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Date: Tue, 12 Jan 2016 15:08:16 +0100
From: Richard Alpe <richard.alpe@...csson.com>
To: <netdev@...r.kernel.org>
CC: <tipc-discussion@...ts.sourceforge.net>,
Richard Alpe <richard.alpe@...csson.com>
Subject: [PATCH net-next v2] tipc: add peer removal functionality
Add TIPC_NL_PEER_REMOVE netlink command. This command can remove
an offline peer node from the internal data structures.
This will be supported by the tipc user space tool in iproute2.
Signed-off-by: Richard Alpe <richard.alpe@...csson.com>
Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
Acked-by: Ying Xue <ying.xue@...driver.com>
---
include/uapi/linux/tipc_netlink.h | 1 +
net/tipc/net.c | 4 +--
net/tipc/net.h | 2 ++
net/tipc/netlink.c | 5 ++++
net/tipc/node.c | 60 +++++++++++++++++++++++++++++++++++----
net/tipc/node.h | 3 +-
6 files changed, 66 insertions(+), 9 deletions(-)
diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h
index d4c8f14..25eb645 100644
--- a/include/uapi/linux/tipc_netlink.h
+++ b/include/uapi/linux/tipc_netlink.h
@@ -56,6 +56,7 @@ enum {
TIPC_NL_NET_GET,
TIPC_NL_NET_SET,
TIPC_NL_NAME_TABLE_GET,
+ TIPC_NL_PEER_REMOVE,
__TIPC_NL_CMD_MAX,
TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 77bf911..042d4ce 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -42,7 +42,7 @@
#include "node.h"
#include "bcast.h"
-static const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
+const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
[TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
[TIPC_NLA_NET_ID] = { .type = NLA_U32 }
};
@@ -139,7 +139,7 @@ void tipc_net_stop(struct net *net)
tn->own_addr);
rtnl_lock();
tipc_bearer_stop(net);
- tipc_node_stop(net);
+ tipc_node_stop_net(net);
rtnl_unlock();
pr_info("Left network mode\n");
diff --git a/net/tipc/net.h b/net/tipc/net.h
index 77a7a11..c7c2549 100644
--- a/net/tipc/net.h
+++ b/net/tipc/net.h
@@ -39,6 +39,8 @@
#include <net/genetlink.h>
+extern const struct nla_policy tipc_nl_net_policy[];
+
int tipc_net_start(struct net *net, u32 addr);
void tipc_net_stop(struct net *net);
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 8975b01..9019df8 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -145,6 +145,11 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
.cmd = TIPC_NL_NAME_TABLE_GET,
.dumpit = tipc_nl_name_table_dump,
.policy = tipc_nl_policy,
+ },
+ {
+ .cmd = TIPC_NL_PEER_REMOVE,
+ .doit = tipc_nl_peer_rm,
+ .policy = tipc_nl_policy,
}
};
diff --git a/net/tipc/node.c b/net/tipc/node.c
index fa97d96..988cdd9 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -399,17 +399,21 @@ static void tipc_node_delete(struct tipc_node *node)
kfree_rcu(node, rcu);
}
-void tipc_node_stop(struct net *net)
+static void tipc_node_stop(struct tipc_node *node)
+{
+ if (del_timer(&node->timer))
+ tipc_node_put(node);
+ tipc_node_put(node);
+}
+
+void tipc_node_stop_net(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_node *node, *t_node;
spin_lock_bh(&tn->node_list_lock);
- list_for_each_entry_safe(node, t_node, &tn->node_list, list) {
- if (del_timer(&node->timer))
- tipc_node_put(node);
- tipc_node_put(node);
- }
+ list_for_each_entry_safe(node, t_node, &tn->node_list, list)
+ tipc_node_stop(node);
spin_unlock_bh(&tn->node_list_lock);
}
@@ -1529,6 +1533,50 @@ discard:
kfree_skb(skb);
}
+int tipc_nl_peer_rm(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ u32 addr;
+ struct net *net = sock_net(skb->sk);
+ struct nlattr *attrs[TIPC_NLA_NET_MAX + 1];
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_node *peer;
+
+ /* We identify the peer by its net */
+ if (!info->attrs[TIPC_NLA_NET])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_NET_MAX,
+ info->attrs[TIPC_NLA_NET],
+ tipc_nl_net_policy);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_NET_ADDR])
+ return -EINVAL;
+
+ addr = nla_get_u32(attrs[TIPC_NLA_NET_ADDR]);
+
+ spin_lock_bh(&tn->node_list_lock);
+ list_for_each_entry_rcu(peer, &tn->node_list, list) {
+ if (peer->addr != addr)
+ continue;
+
+ if (peer->state == SELF_DOWN_PEER_DOWN ||
+ peer->state == SELF_DOWN_PEER_LEAVING) {
+ tipc_node_stop(peer);
+
+ spin_unlock_bh(&tn->node_list_lock);
+ return 0;
+ }
+ spin_unlock_bh(&tn->node_list_lock);
+ return -EBUSY;
+ }
+ spin_unlock_bh(&tn->node_list_lock);
+
+ return -ENXIO;
+}
+
int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
int err;
diff --git a/net/tipc/node.h b/net/tipc/node.h
index f39d9d0..8dfb6ba 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -51,7 +51,7 @@ enum {
#define TIPC_NODE_CAPABILITIES TIPC_BCAST_SYNCH
#define INVALID_BEARER_ID -1
-void tipc_node_stop(struct net *net);
+void tipc_node_stop_net(struct net *net);
void tipc_node_check_dest(struct net *net, u32 onode,
struct tipc_bearer *bearer,
u16 capabilities, u32 signature,
@@ -75,5 +75,6 @@ int tipc_nl_node_dump_link(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_node_reset_link_stats(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_get_link(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_set_link(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_peer_rm(struct sk_buff *skb, struct genl_info *info);
#endif
--
2.1.4
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