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Date: Fri, 9 Jan 2015 15:27:08 +0800
From: Ying Xue <ying.xue@...driver.com>
To: <davem@...emloft.net>
CC: <jon.maloy@...csson.com>, <Tero.Aho@...iant.com>,
<Paul.Gortmaker@...driver.com>, <erik.hugne@...csson.com>,
<richard.alpe@...csson.com>, <netdev@...r.kernel.org>,
<tipc-discussion@...ts.sourceforge.net>
Subject: [PATCH net-next 11/16] tipc: make tipc socket support net namespace
Now tipc socket table is statically allocated as a global variable.
Through it, we can look up one socket instance with port ID, insert
a new socket instance to the table, and delete a socket from the
table. But when tipc supports net namespace, each namespace must own
its specific socket table. So the global variable of socket table
must be redefined in tipc_net structure. As a concequence, a new
socket table will be allocated when a new namespace is created, and
a socket table will be deallocated when namespace is destroyed.
Signed-off-by: Ying Xue <ying.xue@...driver.com>
Tested-by: Tero Aho <Tero.Aho@...iant.com>
Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
---
net/tipc/config.c | 2 +-
net/tipc/core.c | 12 ++++--------
net/tipc/core.h | 4 ++++
net/tipc/net.c | 2 +-
net/tipc/socket.c | 48 +++++++++++++++++++++++++++++-------------------
net/tipc/socket.h | 8 ++++----
6 files changed, 43 insertions(+), 33 deletions(-)
diff --git a/net/tipc/config.c b/net/tipc/config.c
index ac73291..20b1c58 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -257,7 +257,7 @@ struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
rep_tlv_buf = tipc_media_get_names();
break;
case TIPC_CMD_SHOW_PORTS:
- rep_tlv_buf = tipc_sk_socks_show();
+ rep_tlv_buf = tipc_sk_socks_show(net);
break;
case TIPC_CMD_SHOW_STATS:
rep_tlv_buf = tipc_show_stats();
diff --git a/net/tipc/core.c b/net/tipc/core.c
index 7b84439..23ff3ca 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -55,17 +55,20 @@ int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
static int __net_init tipc_init_net(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
+ int err;
tn->net_id = 4711;
INIT_LIST_HEAD(&tn->node_list);
spin_lock_init(&tn->node_list_lock);
- return 0;
+ err = tipc_sk_rht_init(net);
+ return err;
}
static void __net_exit tipc_exit_net(struct net *net)
{
tipc_net_stop(net);
+ tipc_sk_rht_destroy(net);
}
static struct pernet_operations tipc_net_ops = {
@@ -95,10 +98,6 @@ static int __init tipc_init(void)
if (err)
goto out_pernet;
- err = tipc_sk_rht_init();
- if (err)
- goto out_reftbl;
-
err = tipc_nametbl_init();
if (err)
goto out_nametbl;
@@ -136,8 +135,6 @@ out_socket:
out_netlink:
tipc_nametbl_stop();
out_nametbl:
- tipc_sk_rht_destroy();
-out_reftbl:
unregister_pernet_subsys(&tipc_net_ops);
out_pernet:
pr_err("Unable to start in single node mode\n");
@@ -153,7 +150,6 @@ static void __exit tipc_exit(void)
tipc_nametbl_stop();
tipc_socket_stop();
tipc_unregister_sysctl();
- tipc_sk_rht_destroy();
pr_info("Deactivated\n");
}
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 3f6f9e0..1a7f816 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -58,6 +58,7 @@
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <net/netns/generic.h>
+#include <linux/rhashtable.h>
#include "node.h"
#include "bearer.h"
@@ -101,6 +102,9 @@ struct tipc_net {
struct tipc_bcbearer *bcbearer;
struct tipc_bclink *bclink;
struct tipc_link *bcl;
+
+ /* Socket hash table */
+ struct rhashtable sk_rht;
};
#ifdef CONFIG_SYSCTL
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 7548ba8..44ccf47 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -117,7 +117,7 @@ int tipc_net_start(struct net *net, u32 addr)
tipc_own_addr = addr;
tipc_named_reinit();
- tipc_sk_reinit();
+ tipc_sk_reinit(net);
res = tipc_bclink_init(net);
if (res)
return res;
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 6883145..accb02c 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -115,7 +115,7 @@ static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
struct tipc_name_seq const *seq);
static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
struct tipc_name_seq const *seq);
-static struct tipc_sock *tipc_sk_lookup(u32 portid);
+static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
static int tipc_sk_insert(struct tipc_sock *tsk);
static void tipc_sk_remove(struct tipc_sock *tsk);
@@ -179,9 +179,6 @@ static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
* - port reference
*/
-/* Protects tipc socket hash table mutations */
-static struct rhashtable tipc_sk_rht;
-
static u32 tsk_peer_node(struct tipc_sock *tsk)
{
return msg_destnode(&tsk->phdr);
@@ -1766,7 +1763,7 @@ int tipc_sk_rcv(struct net *net, struct sk_buff *skb)
u32 dnode;
/* Validate destination and message */
- tsk = tipc_sk_lookup(dport);
+ tsk = tipc_sk_lookup(net, dport);
if (unlikely(!tsk)) {
rc = tipc_msg_eval(skb, &dnode);
goto exit;
@@ -2245,8 +2242,9 @@ static int tipc_sk_show(struct tipc_sock *tsk, char *buf,
return ret;
}
-struct sk_buff *tipc_sk_socks_show(void)
+struct sk_buff *tipc_sk_socks_show(struct net *net)
{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
const struct bucket_table *tbl;
struct rhash_head *pos;
struct sk_buff *buf;
@@ -2265,7 +2263,7 @@ struct sk_buff *tipc_sk_socks_show(void)
pb_len = ULTRA_STRING_MAX_LEN;
rcu_read_lock();
- tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht);
+ tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
for (i = 0; i < tbl->size; i++) {
rht_for_each_entry_rcu(tsk, pos, tbl, i, node) {
spin_lock_bh(&tsk->sk.sk_lock.slock);
@@ -2286,8 +2284,9 @@ struct sk_buff *tipc_sk_socks_show(void)
/* tipc_sk_reinit: set non-zero address in all existing sockets
* when we go from standalone to network mode.
*/
-void tipc_sk_reinit(void)
+void tipc_sk_reinit(struct net *net)
{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
const struct bucket_table *tbl;
struct rhash_head *pos;
struct tipc_sock *tsk;
@@ -2295,7 +2294,7 @@ void tipc_sk_reinit(void)
int i;
rcu_read_lock();
- tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht);
+ tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
for (i = 0; i < tbl->size; i++) {
rht_for_each_entry_rcu(tsk, pos, tbl, i, node) {
spin_lock_bh(&tsk->sk.sk_lock.slock);
@@ -2308,12 +2307,13 @@ void tipc_sk_reinit(void)
rcu_read_unlock();
}
-static struct tipc_sock *tipc_sk_lookup(u32 portid)
+static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_sock *tsk;
rcu_read_lock();
- tsk = rhashtable_lookup(&tipc_sk_rht, &portid);
+ tsk = rhashtable_lookup(&tn->sk_rht, &portid);
if (tsk)
sock_hold(&tsk->sk);
rcu_read_unlock();
@@ -2323,6 +2323,9 @@ static struct tipc_sock *tipc_sk_lookup(u32 portid)
static int tipc_sk_insert(struct tipc_sock *tsk)
{
+ struct sock *sk = &tsk->sk;
+ struct net *net = sock_net(sk);
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
@@ -2332,7 +2335,7 @@ static int tipc_sk_insert(struct tipc_sock *tsk)
portid = TIPC_MIN_PORT;
tsk->portid = portid;
sock_hold(&tsk->sk);
- if (rhashtable_lookup_insert(&tipc_sk_rht, &tsk->node))
+ if (rhashtable_lookup_insert(&tn->sk_rht, &tsk->node))
return 0;
sock_put(&tsk->sk);
}
@@ -2343,15 +2346,17 @@ static int tipc_sk_insert(struct tipc_sock *tsk)
static void tipc_sk_remove(struct tipc_sock *tsk)
{
struct sock *sk = &tsk->sk;
+ struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
- if (rhashtable_remove(&tipc_sk_rht, &tsk->node)) {
+ if (rhashtable_remove(&tn->sk_rht, &tsk->node)) {
WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
__sock_put(sk);
}
}
-int tipc_sk_rht_init(void)
+int tipc_sk_rht_init(struct net *net)
{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
struct rhashtable_params rht_params = {
.nelem_hint = 192,
.head_offset = offsetof(struct tipc_sock, node),
@@ -2364,15 +2369,17 @@ int tipc_sk_rht_init(void)
.shrink_decision = rht_shrink_below_30,
};
- return rhashtable_init(&tipc_sk_rht, &rht_params);
+ return rhashtable_init(&tn->sk_rht, &rht_params);
}
-void tipc_sk_rht_destroy(void)
+void tipc_sk_rht_destroy(struct net *net)
{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
/* Wait for socket readers to complete */
synchronize_net();
- rhashtable_destroy(&tipc_sk_rht);
+ rhashtable_destroy(&tn->sk_rht);
}
/**
@@ -2730,10 +2737,12 @@ int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
struct rhash_head *pos;
u32 prev_portid = cb->args[0];
u32 portid = prev_portid;
+ struct net *net = sock_net(skb->sk);
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
int i;
rcu_read_lock();
- tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht);
+ tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
for (i = 0; i < tbl->size; i++) {
rht_for_each_entry_rcu(tsk, pos, tbl, i, node) {
spin_lock_bh(&tsk->sk.sk_lock.slock);
@@ -2839,6 +2848,7 @@ int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
u32 tsk_portid = cb->args[0];
u32 last_publ = cb->args[1];
u32 done = cb->args[2];
+ struct net *net = sock_net(skb->sk);
struct tipc_sock *tsk;
if (!tsk_portid) {
@@ -2864,7 +2874,7 @@ int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
if (done)
return 0;
- tsk = tipc_sk_lookup(tsk_portid);
+ tsk = tipc_sk_lookup(net, tsk_portid);
if (!tsk)
return -EINVAL;
diff --git a/net/tipc/socket.h b/net/tipc/socket.h
index eb15c31..c15c4e1 100644
--- a/net/tipc/socket.h
+++ b/net/tipc/socket.h
@@ -50,11 +50,11 @@ void tipc_sock_release_local(struct socket *sock);
int tipc_sock_accept_local(struct socket *sock, struct socket **newsock,
int flags);
int tipc_sk_rcv(struct net *net, struct sk_buff *buf);
-struct sk_buff *tipc_sk_socks_show(void);
+struct sk_buff *tipc_sk_socks_show(struct net *net);
void tipc_sk_mcast_rcv(struct net *net, struct sk_buff *buf);
-void tipc_sk_reinit(void);
-int tipc_sk_rht_init(void);
-void tipc_sk_rht_destroy(void);
+void tipc_sk_reinit(struct net *net);
+int tipc_sk_rht_init(struct net *net);
+void tipc_sk_rht_destroy(struct net *net);
int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb);
--
1.7.9.5
--
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