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Diffstat (limited to 'net')
-rw-r--r--net/dsa/slave.c3
-rw-r--r--net/ipv4/igmp.c4
-rw-r--r--net/ipv4/ip_output.c7
-rw-r--r--net/ipv4/ip_tunnel_core.c2
-rw-r--r--net/ipv4/ipmr.c7
-rw-r--r--net/ipv4/raw.c2
-rw-r--r--net/ipv4/route.c4
-rw-r--r--net/ipv4/tcp_input.c29
-rw-r--r--net/ipv4/tcp_ipv4.c29
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c2
-rw-r--r--net/ipv6/fib6_rules.c9
-rw-r--r--net/ipv6/ip6_output.c6
-rw-r--r--net/ipv6/output_core.c14
-rw-r--r--net/ipv6/udp_offload.c4
-rw-r--r--net/netfilter/ipvs/ip_vs_xmit.c5
-rw-r--r--net/sctp/socket.c5
-rw-r--r--net/sctp/sysctl.c4
-rw-r--r--net/tipc/bcast.c38
-rw-r--r--net/tipc/bcast.h4
-rw-r--r--net/tipc/discover.c1
-rw-r--r--net/tipc/link.c219
-rw-r--r--net/tipc/link.h9
-rw-r--r--net/tipc/msg.h36
-rw-r--r--net/tipc/name_distr.c2
-rw-r--r--net/tipc/node.c90
-rw-r--r--net/tipc/node.h12
26 files changed, 314 insertions, 233 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index f0af7aa331c1..39555f3f263b 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -830,12 +830,13 @@ static bool dsa_slave_dev_check(struct net_device *dev)
static int dsa_slave_master_changed(struct net_device *dev)
{
struct net_device *master = netdev_master_upper_dev_get(dev);
+ struct dsa_slave_priv *p = netdev_priv(dev);
int err = 0;
if (master && master->rtnl_link_ops &&
!strcmp(master->rtnl_link_ops->kind, "bridge"))
err = dsa_slave_bridge_port_join(dev, master);
- else
+ else if (dsa_port_is_bridged(p))
err = dsa_slave_bridge_port_leave(dev);
return err;
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index ad3f866085de..ad09213ac5b2 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -370,7 +370,7 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, unsigned int mtu)
pip->saddr = fl4.saddr;
pip->protocol = IPPROTO_IGMP;
pip->tot_len = 0; /* filled in later */
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
((u8 *)&pip[1])[0] = IPOPT_RA;
((u8 *)&pip[1])[1] = 4;
((u8 *)&pip[1])[2] = 0;
@@ -714,7 +714,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
iph->daddr = dst;
iph->saddr = fl4.saddr;
iph->protocol = IPPROTO_IGMP;
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
((u8 *)&iph[1])[0] = IPOPT_RA;
((u8 *)&iph[1])[1] = 4;
((u8 *)&iph[1])[2] = 0;
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 90b49e88e84a..8259e777b249 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -148,7 +148,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
iph->daddr = (opt && opt->opt.srr ? opt->opt.faddr : daddr);
iph->saddr = saddr;
iph->protocol = sk->sk_protocol;
- ip_select_ident(skb, sk);
+ ip_select_ident(sock_net(sk), skb, sk);
if (opt && opt->opt.optlen) {
iph->ihl += opt->opt.optlen>>2;
@@ -430,7 +430,8 @@ packet_routed:
ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt, 0);
}
- ip_select_ident_segs(skb, sk, skb_shinfo(skb)->gso_segs ?: 1);
+ ip_select_ident_segs(sock_net(sk), skb, sk,
+ skb_shinfo(skb)->gso_segs ?: 1);
/* TODO : should we use skb->sk here instead of sk ? */
skb->priority = sk->sk_priority;
@@ -1379,7 +1380,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
iph->ttl = ttl;
iph->protocol = sk->sk_protocol;
ip_copy_addrs(iph, fl4);
- ip_select_ident(skb, sk);
+ ip_select_ident(net, skb, sk);
if (opt) {
iph->ihl += opt->optlen>>2;
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 88c386cf7d85..8c4dcc46acd2 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -74,7 +74,7 @@ int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
iph->daddr = dst;
iph->saddr = src;
iph->ttl = ttl;
- __ip_select_ident(iph, skb_shinfo(skb)->gso_segs ?: 1);
+ __ip_select_ident(sock_net(sk), iph, skb_shinfo(skb)->gso_segs ?: 1);
err = ip_local_out_sk(sk, skb);
if (unlikely(net_xmit_eval(err)))
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 5b188832800f..c688cd1b2110 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1642,7 +1642,8 @@ static struct notifier_block ip_mr_notifier = {
* important for multicast video.
*/
-static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr)
+static void ip_encap(struct net *net, struct sk_buff *skb,
+ __be32 saddr, __be32 daddr)
{
struct iphdr *iph;
const struct iphdr *old_iph = ip_hdr(skb);
@@ -1661,7 +1662,7 @@ static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr)
iph->protocol = IPPROTO_IPIP;
iph->ihl = 5;
iph->tot_len = htons(skb->len);
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
ip_send_check(iph);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
@@ -1758,7 +1759,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
* What do we do with netfilter? -- RR
*/
if (vif->flags & VIFF_TUNNEL) {
- ip_encap(skb, vif->local, vif->remote);
+ ip_encap(net, skb, vif->local, vif->remote);
/* FIXME: extra output firewall step used to be here. --RR */
vif->dev->stats.tx_packets++;
vif->dev->stats.tx_bytes += skb->len;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 923cf538fce1..56946f47d446 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -404,7 +404,7 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
iph->check = 0;
iph->tot_len = htons(length);
if (!iph->id)
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
}
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 649c8a3f0189..be8703d02ef0 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -482,7 +482,7 @@ u32 ip_idents_reserve(u32 hash, int segs)
}
EXPORT_SYMBOL(ip_idents_reserve);
-void __ip_select_ident(struct iphdr *iph, int segs)
+void __ip_select_ident(struct net *net, struct iphdr *iph, int segs)
{
static u32 ip_idents_hashrnd __read_mostly;
u32 hash, id;
@@ -491,7 +491,7 @@ void __ip_select_ident(struct iphdr *iph, int segs)
hash = jhash_3words((__force u32)iph->daddr,
(__force u32)iph->saddr,
- iph->protocol,
+ iph->protocol ^ net_hash_mix(net),
ip_idents_hashrnd);
id = ip_idents_reserve(hash, segs);
iph->id = htons(id);
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 023196f7ec37..18b80e8bc533 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5987,6 +5987,35 @@ struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops,
}
EXPORT_SYMBOL(inet_reqsk_alloc);
+/*
+ * Return true if a syncookie should be sent
+ */
+static bool tcp_syn_flood_action(struct sock *sk,
+ const struct sk_buff *skb,
+ const char *proto)
+{
+ const char *msg = "Dropping request";
+ bool want_cookie = false;
+ struct listen_sock *lopt;
+
+#ifdef CONFIG_SYN_COOKIES
+ if (sysctl_tcp_syncookies) {
+ msg = "Sending cookies";
+ want_cookie = true;
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES);
+ } else
+#endif
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDROP);
+
+ lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
+ if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
+ lopt->synflood_warned = 1;
+ pr_info("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
+ proto, ntohs(tcp_hdr(skb)->dest), msg);
+ }
+ return want_cookie;
+}
+
int tcp_conn_request(struct request_sock_ops *rsk_ops,
const struct tcp_request_sock_ops *af_ops,
struct sock *sk, struct sk_buff *skb)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index e073517b2cc7..5aababa20a21 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -856,35 +856,6 @@ static void tcp_v4_reqsk_destructor(struct request_sock *req)
kfree(inet_rsk(req)->opt);
}
-/*
- * Return true if a syncookie should be sent
- */
-bool tcp_syn_flood_action(struct sock *sk,
- const struct sk_buff *skb,
- const char *proto)
-{
- const char *msg = "Dropping request";
- bool want_cookie = false;
- struct listen_sock *lopt;
-
-#ifdef CONFIG_SYN_COOKIES
- if (sysctl_tcp_syncookies) {
- msg = "Sending cookies";
- want_cookie = true;
- NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES);
- } else
-#endif
- NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDROP);
-
- lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
- if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
- lopt->synflood_warned = 1;
- pr_info("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
- proto, ntohs(tcp_hdr(skb)->dest), msg);
- }
- return want_cookie;
-}
-EXPORT_SYMBOL(tcp_syn_flood_action);
#ifdef CONFIG_TCP_MD5SIG
/*
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index 91771a7c802f..35feda676464 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -63,7 +63,7 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
top_iph->saddr = x->props.saddr.a4;
top_iph->daddr = x->id.daddr.a4;
- ip_select_ident(skb, NULL);
+ ip_select_ident(dev_net(dst->dev), skb, NULL);
return 0;
}
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 27ca79682efb..273eb26cd6d4 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -299,19 +299,16 @@ static int __net_init fib6_rules_net_init(struct net *net)
ops = fib_rules_register(&fib6_rules_ops_template, net);
if (IS_ERR(ops))
return PTR_ERR(ops);
- net->ipv6.fib6_rules_ops = ops;
-
- err = fib_default_rule_add(net->ipv6.fib6_rules_ops, 0,
- RT6_TABLE_LOCAL, 0);
+ err = fib_default_rule_add(ops, 0, RT6_TABLE_LOCAL, 0);
if (err)
goto out_fib6_rules_ops;
- err = fib_default_rule_add(net->ipv6.fib6_rules_ops,
- 0x7FFE, RT6_TABLE_MAIN, 0);
+ err = fib_default_rule_add(ops, 0x7FFE, RT6_TABLE_MAIN, 0);
if (err)
goto out_fib6_rules_ops;
+ net->ipv6.fib6_rules_ops = ops;
out:
return err;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 7e80b61b51ff..b06ad00048d5 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -628,7 +628,7 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
skb_reset_network_header(skb);
memcpy(skb_network_header(skb), tmp_hdr, hlen);
- ipv6_select_ident(fh, rt);
+ ipv6_select_ident(net, fh, rt);
fh->nexthdr = nexthdr;
fh->reserved = 0;
fh->frag_off = htons(IP6_MF);
@@ -775,7 +775,7 @@ slow_path:
fh->nexthdr = nexthdr;
fh->reserved = 0;
if (!frag_id) {
- ipv6_select_ident(fh, rt);
+ ipv6_select_ident(net, fh, rt);
frag_id = fh->identification;
} else
fh->identification = frag_id;
@@ -1079,7 +1079,7 @@ static inline int ip6_ufo_append_data(struct sock *sk,
skb_shinfo(skb)->gso_size = (mtu - fragheaderlen -
sizeof(struct frag_hdr)) & ~7;
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
- ipv6_select_ident(&fhdr, rt);
+ ipv6_select_ident(sock_net(sk), &fhdr, rt);
skb_shinfo(skb)->ip6_frag_id = fhdr.identification;
append:
diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index 74581f706c4d..4016a6ef9d61 100644
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -9,13 +9,14 @@
#include <net/addrconf.h>
#include <net/secure_seq.h>
-static u32 __ipv6_select_ident(u32 hashrnd, struct in6_addr *dst,
- struct in6_addr *src)
+static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
+ struct in6_addr *dst, struct in6_addr *src)
{
u32 hash, id;
hash = __ipv6_addr_jhash(dst, hashrnd);
hash = __ipv6_addr_jhash(src, hash);
+ hash ^= net_hash_mix(net);
/* Treat id of 0 as unset and if we get 0 back from ip_idents_reserve,
* set the hight order instead thus minimizing possible future
@@ -36,7 +37,7 @@ static u32 __ipv6_select_ident(u32 hashrnd, struct in6_addr *dst,
*
* The network header must be set before calling this.
*/
-void ipv6_proxy_select_ident(struct sk_buff *skb)
+void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
{
static u32 ip6_proxy_idents_hashrnd __read_mostly;
struct in6_addr buf[2];
@@ -53,20 +54,21 @@ void ipv6_proxy_select_ident(struct sk_buff *skb)
net_get_random_once(&ip6_proxy_idents_hashrnd,
sizeof(ip6_proxy_idents_hashrnd));
- id = __ipv6_select_ident(ip6_proxy_idents_hashrnd,
+ id = __ipv6_select_ident(net, ip6_proxy_idents_hashrnd,
&addrs[1], &addrs[0]);
skb_shinfo(skb)->ip6_frag_id = htonl(id);
}
EXPORT_SYMBOL_GPL(ipv6_proxy_select_ident);
-void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt)
+void ipv6_select_ident(struct net *net, struct frag_hdr *fhdr,
+ struct rt6_info *rt)
{
static u32 ip6_idents_hashrnd __read_mostly;
u32 id;
net_get_random_once(&ip6_idents_hashrnd, sizeof(ip6_idents_hashrnd));
- id = __ipv6_select_ident(ip6_idents_hashrnd, &rt->rt6i_dst.addr,
+ id = __ipv6_select_ident(net, ip6_idents_hashrnd, &rt->rt6i_dst.addr,
&rt->rt6i_src.addr);
fhdr->identification = htonl(id);
}
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index be2c0ba82c85..7441e1e63893 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -54,7 +54,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
/* Set the IPv6 fragment id if not set yet */
if (!skb_shinfo(skb)->ip6_frag_id)
- ipv6_proxy_select_ident(skb);
+ ipv6_proxy_select_ident(dev_net(skb->dev), skb);
segs = NULL;
goto out;
@@ -113,7 +113,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
if (!skb_shinfo(skb)->ip6_frag_id)
- ipv6_proxy_select_ident(skb);
+ ipv6_proxy_select_ident(dev_net(skb->dev), skb);
fptr->identification = skb_shinfo(skb)->ip6_frag_id;
/* Fragment the skb. ipv6 header and the remaining fields of the
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index f35c15b0de6b..bf02932b7188 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -924,7 +924,8 @@ int
ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
- struct netns_ipvs *ipvs = net_ipvs(skb_net(skb));
+ struct net *net = skb_net(skb);
+ struct netns_ipvs *ipvs = net_ipvs(net);
struct rtable *rt; /* Route to the other host */
__be32 saddr; /* Source for tunnel */
struct net_device *tdev; /* Device to other host */
@@ -991,7 +992,7 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
iph->daddr = cp->daddr.ip;
iph->saddr = saddr;
iph->ttl = ttl;
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
/* Another hack: avoid icmp_send in ip_fragment */
skb->ignore_df = 1;
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index f1a65398f311..f09de7fac2e6 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -102,11 +102,6 @@ static int sctp_autobind(struct sock *sk);
static void sctp_sock_migrate(struct sock *, struct sock *,
struct sctp_association *, sctp_socket_type_t);
-extern struct kmem_cache *sctp_bucket_cachep;
-extern long sysctl_sctp_mem[3];
-extern int sysctl_sctp_rmem[3];
-extern int sysctl_sctp_wmem[3];
-
static int sctp_memory_pressure;
static atomic_long_t sctp_memory_allocated;
struct percpu_counter sctp_sockets_allocated;
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 2e9ada10fd84..26d50c565f54 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -58,10 +58,6 @@ static unsigned long max_autoclose_max =
(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
-extern long sysctl_sctp_mem[3];
-extern int sysctl_sctp_rmem[3];
-extern int sysctl_sctp_wmem[3];
-
static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos);
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 5aff0844d4d3..ae558dd7f8ee 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -62,21 +62,8 @@ static void tipc_bclink_lock(struct net *net)
static void tipc_bclink_unlock(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_node *node = NULL;
- if (likely(!tn->bclink->flags)) {
- spin_unlock_bh(&tn->bclink->lock);
- return;
- }
-
- if (tn->bclink->flags & TIPC_BCLINK_RESET) {
- tn->bclink->flags &= ~TIPC_BCLINK_RESET;
- node = tipc_bclink_retransmit_to(net);
- }
spin_unlock_bh(&tn->bclink->lock);
-
- if (node)
- tipc_link_reset_all(node);
}
void tipc_bclink_input(struct net *net)
@@ -91,13 +78,6 @@ uint tipc_bclink_get_mtu(void)
return MAX_PKT_DEFAULT_MCAST;
}
-void tipc_bclink_set_flags(struct net *net, unsigned int flags)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- tn->bclink->flags |= flags;
-}
-
static u32 bcbuf_acks(struct sk_buff *buf)
{
return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle;
@@ -156,7 +136,6 @@ static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
seqno : node->bclink.last_sent;
}
-
/**
* tipc_bclink_retransmit_to - get most recent node to request retransmission
*
@@ -350,13 +329,12 @@ static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
return;
tipc_node_lock(n_ptr);
-
if (n_ptr->bclink.recv_permitted &&
(n_ptr->bclink.last_in != n_ptr->bclink.last_sent) &&
(n_ptr->bclink.last_in == msg_bcgap_after(msg)))
n_ptr->bclink.oos_state = 2;
-
tipc_node_unlock(n_ptr);
+ tipc_node_put(n_ptr);
}
/* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster
@@ -476,17 +454,18 @@ void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
goto unlock;
if (msg_destnode(msg) == tn->own_addr) {
tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
- tipc_node_unlock(node);
tipc_bclink_lock(net);
bcl->stats.recv_nacks++;
tn->bclink->retransmit_to = node;
bclink_retransmit_pkt(tn, msg_bcgap_after(msg),
msg_bcgap_to(msg));
tipc_bclink_unlock(net);
+ tipc_node_unlock(node);
} else {
tipc_node_unlock(node);
bclink_peek_nack(net, msg);
}
+ tipc_node_put(node);
goto exit;
}
@@ -523,11 +502,13 @@ receive:
tipc_bclink_unlock(net);
tipc_node_unlock(node);
} else if (msg_user(msg) == MSG_FRAGMENTER) {
- tipc_buf_append(&node->bclink.reasm_buf, &buf);
- if (unlikely(!buf && !node->bclink.reasm_buf))
- goto unlock;
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
+ tipc_buf_append(&node->bclink.reasm_buf, &buf);
+ if (unlikely(!buf && !node->bclink.reasm_buf)) {
+ tipc_bclink_unlock(net);
+ goto unlock;
+ }
bcl->stats.recv_fragments++;
if (buf) {
bcl->stats.recv_fragmented++;
@@ -589,6 +570,7 @@ receive:
unlock:
tipc_node_unlock(node);
+ tipc_node_put(node);
exit:
kfree_skb(buf);
}
@@ -829,7 +811,7 @@ int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg)
prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP);
if (!prop)
goto attr_msg_full;
- if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->queue_limit[0]))
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->window))
goto prop_msg_full;
nla_nest_end(msg->skb, prop);
diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h
index 43f397fbac55..4bdc12277d33 100644
--- a/net/tipc/bcast.h
+++ b/net/tipc/bcast.h
@@ -55,7 +55,6 @@ struct tipc_bcbearer_pair {
struct tipc_bearer *secondary;
};
-#define TIPC_BCLINK_RESET 1
#define BCBEARER MAX_BEARERS
/**
@@ -86,7 +85,6 @@ struct tipc_bcbearer {
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
- * @flags: represent bclink states
* @bcast_nodes: map of broadcast-capable nodes
* @retransmit_to: node that most recently requested a retransmit
*
@@ -96,7 +94,6 @@ struct tipc_bclink {
spinlock_t lock;
struct tipc_link link;
struct tipc_node node;
- unsigned int flags;
struct sk_buff_head arrvq;
struct sk_buff_head inputq;
struct tipc_node_map bcast_nodes;
@@ -117,7 +114,6 @@ static inline int tipc_nmap_equal(struct tipc_node_map *nm_a,
int tipc_bclink_init(struct net *net);
void tipc_bclink_stop(struct net *net);
-void tipc_bclink_set_flags(struct net *tn, unsigned int flags);
void tipc_bclink_add_node(struct net *net, u32 addr);
void tipc_bclink_remove_node(struct net *net, u32 addr);
struct tipc_node *tipc_bclink_retransmit_to(struct net *tn);
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 169f3dd038b9..967e292f53c8 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -260,6 +260,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *buf,
}
}
tipc_node_unlock(node);
+ tipc_node_put(node);
}
/**
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 8c98c4d00ad6..514466efc25c 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -139,6 +139,13 @@ static void tipc_link_put(struct tipc_link *l_ptr)
kref_put(&l_ptr->ref, tipc_link_release);
}
+static struct tipc_link *tipc_parallel_link(struct tipc_link *l)
+{
+ if (l->owner->active_links[0] != l)
+ return l->owner->active_links[0];
+ return l->owner->active_links[1];
+}
+
static void link_init_max_pkt(struct tipc_link *l_ptr)
{
struct tipc_node *node = l_ptr->owner;
@@ -310,7 +317,6 @@ struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
link_init_max_pkt(l_ptr);
l_ptr->priority = b_ptr->priority;
tipc_link_set_queue_limits(l_ptr, b_ptr->window);
-
l_ptr->next_out_no = 1;
__skb_queue_head_init(&l_ptr->transmq);
__skb_queue_head_init(&l_ptr->backlogq);
@@ -368,28 +374,43 @@ void tipc_link_delete_list(struct net *net, unsigned int bearer_id,
}
/**
- * link_schedule_user - schedule user for wakeup after congestion
+ * link_schedule_user - schedule a message sender for wakeup after congestion
* @link: congested link
- * @oport: sending port
- * @chain_sz: size of buffer chain that was attempted sent
- * @imp: importance of message attempted sent
+ * @list: message that was attempted sent
* Create pseudo msg to send back to user when congestion abates
+ * Only consumes message if there is an error
*/
-static bool link_schedule_user(struct tipc_link *link, u32 oport,
- uint chain_sz, uint imp)
+static int link_schedule_user(struct tipc_link *link, struct sk_buff_head *list)
{
- struct sk_buff *buf;
+ struct tipc_msg *msg = buf_msg(skb_peek(list));
+ int imp = msg_importance(msg);
+ u32 oport = msg_origport(msg);
+ u32 addr = link_own_addr(link);
+ struct sk_buff *skb;
- buf = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0,
- link_own_addr(link), link_own_addr(link),
- oport, 0, 0);
- if (!buf)
- return false;
- TIPC_SKB_CB(buf)->chain_sz = chain_sz;
- TIPC_SKB_CB(buf)->chain_imp = imp;
- skb_queue_tail(&link->wakeupq, buf);
+ /* This really cannot happen... */
+ if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) {
+ pr_warn("%s<%s>, send queue full", link_rst_msg, link->name);
+ tipc_link_reset(link);
+ goto err;
+ }
+ /* Non-blocking sender: */
+ if (TIPC_SKB_CB(skb_peek(list))->wakeup_pending)
+ return -ELINKCONG;
+
+ /* Create and schedule wakeup pseudo message */
+ skb = tipc_msg_create(SOCK_WAKEUP, 0, INT_H_SIZE, 0,
+ addr, addr, oport, 0, 0);
+ if (!skb)
+ goto err;
+ TIPC_SKB_CB(skb)->chain_sz = skb_queue_len(list);
+ TIPC_SKB_CB(skb)->chain_imp = imp;
+ skb_queue_tail(&link->wakeupq, skb);
link->stats.link_congs++;
- return true;
+ return -ELINKCONG;
+err:
+ __skb_queue_purge(list);
+ return -ENOBUFS;
}
/**
@@ -398,19 +419,22 @@ static bool link_schedule_user(struct tipc_link *link, u32 oport,
* Move a number of waiting users, as permitted by available space in
* the send queue, from link wait queue to node wait queue for wakeup
*/
-void link_prepare_wakeup(struct tipc_link *link)
+void link_prepare_wakeup(struct tipc_link *l)
{
- uint pend_qsz = skb_queue_len(&link->backlogq);
+ int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,};
+ int imp, lim;
struct sk_buff *skb, *tmp;
- skb_queue_walk_safe(&link->wakeupq, skb, tmp) {
- if (pend_qsz >= link->queue_limit[TIPC_SKB_CB(skb)->chain_imp])
+ skb_queue_walk_safe(&l->wakeupq, skb, tmp) {
+ imp = TIPC_SKB_CB(skb)->chain_imp;
+ lim = l->window + l->backlog[imp].limit;
+ pnd[imp] += TIPC_SKB_CB(skb)->chain_sz;
+ if ((pnd[imp] + l->backlog[imp].len) >= lim)
break;
- pend_qsz += TIPC_SKB_CB(skb)->chain_sz;
- skb_unlink(skb, &link->wakeupq);
- skb_queue_tail(&link->inputq, skb);
- link->owner->inputq = &link->inputq;
- link->owner->action_flags |= TIPC_MSG_EVT;
+ skb_unlink(skb, &l->wakeupq);
+ skb_queue_tail(&l->inputq, skb);
+ l->owner->inputq = &l->inputq;
+ l->owner->action_flags |= TIPC_MSG_EVT;
}
}
@@ -424,6 +448,16 @@ void tipc_link_reset_fragments(struct tipc_link *l_ptr)
l_ptr->reasm_buf = NULL;
}
+static void tipc_link_purge_backlog(struct tipc_link *l)
+{
+ __skb_queue_purge(&l->backlogq);
+ l->backlog[TIPC_LOW_IMPORTANCE].len = 0;
+ l->backlog[TIPC_MEDIUM_IMPORTANCE].len = 0;
+ l->backlog[TIPC_HIGH_IMPORTANCE].len = 0;
+ l->backlog[TIPC_CRITICAL_IMPORTANCE].len = 0;
+ l->backlog[TIPC_SYSTEM_IMPORTANCE].len = 0;
+}
+
/**
* tipc_link_purge_queues - purge all pkt queues associated with link
* @l_ptr: pointer to link
@@ -432,7 +466,7 @@ void tipc_link_purge_queues(struct tipc_link *l_ptr)
{
__skb_queue_purge(&l_ptr->deferdq);
__skb_queue_purge(&l_ptr->transmq);
- __skb_queue_purge(&l_ptr->backlogq);
+ tipc_link_purge_backlog(l_ptr);
tipc_link_reset_fragments(l_ptr);
}
@@ -466,13 +500,13 @@ void tipc_link_reset(struct tipc_link *l_ptr)
/* Clean up all queues, except inputq: */
__skb_queue_purge(&l_ptr->transmq);
- __skb_queue_purge(&l_ptr->backlogq);
__skb_queue_purge(&l_ptr->deferdq);
if (!owner->inputq)
owner->inputq = &l_ptr->inputq;
skb_queue_splice_init(&l_ptr->wakeupq, owner->inputq);
if (!skb_queue_empty(owner->inputq))
owner->action_flags |= TIPC_MSG_EVT;
+ tipc_link_purge_backlog(l_ptr);
l_ptr->rcv_unacked = 0;
l_ptr->checkpoint = 1;
l_ptr->next_out_no = 1;
@@ -696,48 +730,15 @@ static void link_state_event(struct tipc_link *l_ptr, unsigned int event)
}
}
-/* tipc_link_cong: determine return value and how to treat the
- * sent buffer during link congestion.
- * - For plain, errorless user data messages we keep the buffer and
- * return -ELINKONG.
- * - For all other messages we discard the buffer and return -EHOSTUNREACH
- * - For TIPC internal messages we also reset the link
- */
-static int tipc_link_cong(struct tipc_link *link, struct sk_buff_head *list)
-{
- struct sk_buff *skb = skb_peek(list);
- struct tipc_msg *msg = buf_msg(skb);
- int imp = msg_importance(msg);
- u32 oport = msg_tot_origport(msg);
-
- if (unlikely(imp > TIPC_CRITICAL_IMPORTANCE)) {
- pr_warn("%s<%s>, send queue full", link_rst_msg, link->name);
- tipc_link_reset(link);
- goto drop;
- }
- if (unlikely(msg_errcode(msg)))
- goto drop;
- if (unlikely(msg_reroute_cnt(msg)))
- goto drop;
- if (TIPC_SKB_CB(skb)->wakeup_pending)
- return -ELINKCONG;
- if (link_schedule_user(link, oport, skb_queue_len(list), imp))
- return -ELINKCONG;
-drop:
- __skb_queue_purge(list);
- return -EHOSTUNREACH;
-}
-
/**
* __tipc_link_xmit(): same as tipc_link_xmit, but destlink is known & locked
* @link: link to use
* @list: chain of buffers containing message
*
- * Consumes the buffer chain, except when returning -ELINKCONG
- * Returns 0 if success, otherwise errno: -ELINKCONG, -EMSGSIZE (plain socket
- * user data messages) or -EHOSTUNREACH (all other messages/senders)
- * Only the socket functions tipc_send_stream() and tipc_send_packet() need
- * to act on the return value, since they may need to do more send attempts.
+ * Consumes the buffer chain, except when returning -ELINKCONG,
+ * since the caller then may want to make more send attempts.
+ * Returns 0 if success, or errno: -ELINKCONG, -EMSGSIZE or -ENOBUFS
+ * Messages at TIPC_SYSTEM_IMPORTANCE are always accepted
*/
int __tipc_link_xmit(struct net *net, struct tipc_link *link,
struct sk_buff_head *list)
@@ -754,16 +755,14 @@ int __tipc_link_xmit(struct net *net, struct tipc_link *link,
struct sk_buff_head *backlogq = &link->backlogq;
struct sk_buff *skb, *tmp;
- /* Match queue limit against msg importance: */
- if (unlikely(skb_queue_len(backlogq) >= link->queue_limit[imp]))
- return tipc_link_cong(link, list);
+ /* Match backlog limit against msg importance: */
+ if (unlikely(link->backlog[imp].len >= link->backlog[imp].limit))
+ return link_schedule_user(link, list);
- /* Has valid packet limit been used ? */
if (unlikely(msg_size(msg) > mtu)) {
__skb_queue_purge(list);
return -EMSGSIZE;
}
-
/* Prepare each packet for sending, and add to relevant queue: */
skb_queue_walk_safe(list, skb, tmp) {
__skb_unlink(skb, list);
@@ -786,8 +785,10 @@ int __tipc_link_xmit(struct net *net, struct tipc_link *link,
if (tipc_msg_make_bundle(&skb, mtu, link->addr)) {
link->stats.sent_bundled++;
link->stats.sent_bundles++;
+ imp = msg_importance(buf_msg(skb));
}
__skb_queue_tail(backlogq, skb);
+ link->backlog[imp].len++;
seqno++;
}
link->next_out_no = seqno;
@@ -808,13 +809,25 @@ static int __tipc_link_xmit_skb(struct tipc_link *link, struct sk_buff *skb)
return __tipc_link_xmit(link->owner->net, link, &head);
}
+/* tipc_link_xmit_skb(): send single buffer to destination
+ * Buffers sent via this functon are generally TIPC_SYSTEM_IMPORTANCE
+ * messages, which will not be rejected
+ * The only exception is datagram messages rerouted after secondary
+ * lookup, which are rare and safe to dispose of anyway.
+ * TODO: Return real return value, and let callers use
+ * tipc_wait_for_sendpkt() where applicable
+ */
int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode,
u32 selector)
{
struct sk_buff_head head;
+ int rc;
skb2list(skb, &head);
- return tipc_link_xmit(net, &head, dnode, selector);
+ rc = tipc_link_xmit(net, &head, dnode, selector);
+ if (rc == -ELINKCONG)
+ kfree_skb(skb);
+ return 0;
}
/**
@@ -841,6 +854,7 @@ int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dnode,
if (link)
rc = __tipc_link_xmit(net, link, list);
tipc_node_unlock(node);
+ tipc_node_put(node);
}
if (link)
return rc;
@@ -914,6 +928,7 @@ void tipc_link_push_packets(struct tipc_link *link)
if (!skb)
break;
msg = buf_msg(skb);
+ link->backlog[msg_importance(msg)].len--;
msg_set_ack(msg, ack);
msg_set_bcast_ack(msg, link->owner->bclink.last_in);
link->rcv_unacked = 0;
@@ -966,7 +981,6 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
(unsigned long) TIPC_SKB_CB(buf)->handle);
n_ptr = tipc_bclink_retransmit_to(net);
- tipc_node_lock(n_ptr);
tipc_addr_string_fill(addr_string, n_ptr->addr);
pr_info("Broadcast link info for %s\n", addr_string);
@@ -978,9 +992,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
n_ptr->bclink.oos_state,
n_ptr->bclink.last_sent);
- tipc_node_unlock(n_ptr);
-
- tipc_bclink_set_flags(net, TIPC_BCLINK_RESET);
+ n_ptr->action_flags |= TIPC_BCAST_RESET;
l_ptr->stale_count = 0;
}
}
@@ -1019,6 +1031,32 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *skb,
}
}
+/* link_synch(): check if all packets arrived before the synch
+ * point have been consumed
+ * Returns true if the parallel links are synched, otherwise false
+ */
+static bool link_synch(struct tipc_link *l)
+{
+ unsigned int post_synch;
+ struct tipc_link *pl;
+
+ pl = tipc_parallel_link(l);
+ if (pl == l)
+ goto synched;
+
+ /* Was last pre-synch packet added to input queue ? */
+ if (less_eq(pl->next_in_no, l->synch_point))
+ return false;
+
+ /* Is it still in the input queue ? */
+ post_synch = mod(pl->next_in_no - l->synch_point) - 1;
+ if (skb_queue_len(&pl->inputq) > post_synch)
+ return false;
+synched:
+ l->flags &= ~LINK_SYNCHING;
+ return true;
+}
+
static void link_retrieve_defq(struct tipc_link *link,
struct sk_buff_head *list)
{
@@ -1079,8 +1117,8 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
n_ptr = tipc_node_find(net, msg_prevnode(msg));
if (unlikely(!n_ptr))
goto discard;
- tipc_node_lock(n_ptr);
+ tipc_node_lock(n_ptr);
/* Locate unicast link endpoint that should handle message */
l_ptr = n_ptr->links[b_ptr->identity];
if (unlikely(!l_ptr))
@@ -1149,6 +1187,14 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
skb = NULL;
goto unlock;
}
+ /* Synchronize with parallel link if applicable */
+ if (unlikely((l_ptr->flags & LINK_SYNCHING) && !msg_dup(msg))) {
+ link_handle_out_of_seq_msg(l_ptr, skb);
+ if (link_synch(l_ptr))
+ link_retrieve_defq(l_ptr, &head);
+ skb = NULL;
+ goto unlock;
+ }
l_ptr->next_in_no++;
if (unlikely(!skb_queue_empty(&l_ptr->deferdq)))
link_retrieve_defq(l_ptr, &head);
@@ -1160,6 +1206,7 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr)
skb = NULL;
unlock:
tipc_node_unlock(n_ptr);
+ tipc_node_put(n_ptr);
discard:
if (unlikely(skb))
kfree_skb(skb);
@@ -1224,6 +1271,10 @@ static void tipc_link_input(struct tipc_link *link, struct sk_buff *skb)
switch (msg_user(msg)) {
case CHANGEOVER_PROTOCOL:
+ if (msg_dup(msg)) {
+ link->flags |= LINK_SYNCHING;
+ link->synch_point = msg_seqno(msg_get_wrapped(msg));
+ }
if (!tipc_link_tunnel_rcv(node, &skb))
break;
if (msg_user(buf_msg(skb)) != MSG_BUNDLER) {
@@ -1610,6 +1661,7 @@ void tipc_link_failover_send_queue(struct tipc_link *l_ptr)
tipc_msg_init(link_own_addr(l_ptr), &tunnel_hdr, CHANGEOVER_PROTOCOL,
ORIGINAL_MSG, INT_H_SIZE, l_ptr->addr);
skb_queue_splice_tail_init(&l_ptr->backlogq, &l_ptr->transmq);
+ tipc_link_purge_backlog(l_ptr);
msgcount = skb_queue_len(&l_ptr->transmq);
msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id);
msg_set_msgcnt(&tunnel_hdr, msgcount);
@@ -1817,11 +1869,11 @@ void tipc_link_set_queue_limits(struct tipc_link *l, u32 win)
int max_bulk = TIPC_MAX_PUBLICATIONS / (l->max_pkt / ITEM_SIZE);
l->window = win;
- l->queue_limit[TIPC_LOW_IMPORTANCE] = win / 2;
- l->queue_limit[TIPC_MEDIUM_IMPORTANCE] = win;
- l->queue_limit[TIPC_HIGH_IMPORTANCE] = win / 2 * 3;
- l->queue_limit[TIPC_CRITICAL_IMPORTANCE] = win * 2;
- l->queue_limit[TIPC_SYSTEM_IMPORTANCE] = max_bulk;
+ l->backlog[TIPC_LOW_IMPORTANCE].limit = win / 2;
+ l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = win;
+ l->backlog[TIPC_HIGH_IMPORTANCE].limit = win / 2 * 3;
+ l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = win * 2;
+ l->backlog[TIPC_SYSTEM_IMPORTANCE].limit = max_bulk;
}
/* tipc_link_find_owner - locate owner node of link by link's name
@@ -2120,7 +2172,7 @@ static int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg,
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, link->tolerance))
goto prop_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN,
- link->queue_limit[TIPC_LOW_IMPORTANCE]))
+ link->window))
goto prop_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, link->priority))
goto prop_msg_full;
@@ -2186,7 +2238,6 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb)
msg.seq = cb->nlh->nlmsg_seq;
rcu_read_lock();
-
if (prev_node) {
node = tipc_node_find(net, prev_node);
if (!node) {
@@ -2199,6 +2250,7 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb)
cb->prev_seq = 1;
goto out;
}
+ tipc_node_put(node);
list_for_each_entry_continue_rcu(node, &tn->node_list,
list) {
@@ -2206,6 +2258,7 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb)
err = __tipc_nl_add_node_links(net, &msg, node,
&prev_link);
tipc_node_unlock(node);
+ tipc_node_put(node);
if (err)
goto out;
diff --git a/net/tipc/link.h b/net/tipc/link.h
index eec3ecf2d450..d2b5663643da 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -60,6 +60,7 @@
*/
#define LINK_STARTED 0x0001
#define LINK_STOPPED 0x0002
+#define LINK_SYNCHING 0x0004
/* Starting value for maximum packet size negotiation on unicast links
* (unless bearer MTU is less)
@@ -118,7 +119,7 @@ struct tipc_stats {
* @pmsg: convenience pointer to "proto_msg" field
* @priority: current link priority
* @net_plane: current link network plane ('A' through 'H')
- * @queue_limit: outbound message queue congestion thresholds (indexed by user)
+ * @backlog_limit: backlog queue congestion thresholds (indexed by importance)
* @exp_msg_count: # of tunnelled messages expected during link changeover
* @reset_checkpoint: seq # of last acknowledged message at time of link reset
* @max_pkt: current maximum packet size for this link
@@ -166,11 +167,11 @@ struct tipc_link {
struct tipc_msg *pmsg;
u32 priority;
char net_plane;
- u32 queue_limit[15]; /* queue_limit[0]==window limit */
/* Changeover */
u32 exp_msg_count;
u32 reset_checkpoint;
+ u32 synch_point;
/* Max packet negotiation */
u32 max_pkt;
@@ -180,6 +181,10 @@ struct tipc_link {
/* Sending */
struct sk_buff_head transmq;
struct sk_buff_head backlogq;
+ struct {
+ u16 len;
+ u16 limit;
+ } backlog[5];
u32 next_out_no;
u32 window;
u32 last_retransmitted;
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index bd3969a80dd4..d273207ede28 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -240,6 +240,15 @@ static inline void msg_set_size(struct tipc_msg *m, u32 sz)
m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
}
+static inline unchar *msg_data(struct tipc_msg *m)
+{
+ return ((unchar *)m) + msg_hdr_sz(m);
+}
+
+static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
+{
+ return (struct tipc_msg *)msg_data(m);
+}
/*
* Word 1
@@ -372,6 +381,8 @@ static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
static inline u32 msg_origport(struct tipc_msg *m)
{
+ if (msg_user(m) == MSG_FRAGMENTER)
+ m = msg_get_wrapped(m);
return msg_word(m, 4);
}
@@ -467,16 +478,6 @@ static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
msg_set_word(m, 10, n);
}
-static inline unchar *msg_data(struct tipc_msg *m)
-{
- return ((unchar *)m) + msg_hdr_sz(m);
-}
-
-static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
-{
- return (struct tipc_msg *)msg_data(m);
-}
-
/*
* Constants and routines used to read and write TIPC internal message headers
*/
@@ -553,6 +554,14 @@ static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
msg_set_bits(m, 1, 15, 0x1fff, n);
}
+static inline bool msg_dup(struct tipc_msg *m)
+{
+ if (likely(msg_user(m) != CHANGEOVER_PROTOCOL))
+ return false;
+ if (msg_type(m) != DUPLICATE_MSG)
+ return false;
+ return true;
+}
/*
* Word 2
@@ -753,13 +762,6 @@ static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
msg_set_bits(m, 9, 0, 0xffff, n);
}
-static inline u32 msg_tot_origport(struct tipc_msg *m)
-{
- if ((msg_user(m) == MSG_FRAGMENTER) && (msg_type(m) == FIRST_FRAGMENT))
- return msg_origport(msg_get_wrapped(m));
- return msg_origport(m);
-}
-
struct sk_buff *tipc_buf_acquire(u32 size);
bool tipc_msg_validate(struct sk_buff *skb);
bool tipc_msg_reverse(u32 own_addr, struct sk_buff *buf, u32 *dnode,
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 506aaa565da7..41e7b7e4dda0 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -244,6 +244,7 @@ static void tipc_publ_subscribe(struct net *net, struct publication *publ,
tipc_node_lock(node);
list_add_tail(&publ->nodesub_list, &node->publ_list);
tipc_node_unlock(node);
+ tipc_node_put(node);
}
static void tipc_publ_unsubscribe(struct net *net, struct publication *publ,
@@ -258,6 +259,7 @@ static void tipc_publ_unsubscribe(struct net *net, struct publication *publ,
tipc_node_lock(node);
list_del_init(&publ->nodesub_list);
tipc_node_unlock(node);
+ tipc_node_put(node);
}
/**
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 26d1de1bf34d..3e4f04897c03 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -42,6 +42,7 @@
static void node_lost_contact(struct tipc_node *n_ptr);
static void node_established_contact(struct tipc_node *n_ptr);
+static void tipc_node_delete(struct tipc_node *node);
struct tipc_sock_conn {
u32 port;
@@ -67,6 +68,23 @@ static unsigned int tipc_hashfn(u32 addr)
return addr & (NODE_HTABLE_SIZE - 1);
}
+static void tipc_node_kref_release(struct kref *kref)
+{
+ struct tipc_node *node = container_of(kref, struct tipc_node, kref);
+
+ tipc_node_delete(node);
+}
+
+void tipc_node_put(struct tipc_node *node)
+{
+ kref_put(&node->kref, tipc_node_kref_release);
+}
+
+static void tipc_node_get(struct tipc_node *node)
+{
+ kref_get(&node->kref);
+}
+
/*
* tipc_node_find - locate specified node object, if it exists
*/
@@ -82,6 +100,7 @@ struct tipc_node *tipc_node_find(struct net *net, u32 addr)
hlist_for_each_entry_rcu(node, &tn->node_htable[tipc_hashfn(addr)],
hash) {
if (node->addr == addr) {
+ tipc_node_get(node);
rcu_read_unlock();
return node;
}
@@ -106,6 +125,7 @@ struct tipc_node *tipc_node_create(struct net *net, u32 addr)
}
n_ptr->addr = addr;
n_ptr->net = net;
+ kref_init(&n_ptr->kref);
spin_lock_init(&n_ptr->lock);
INIT_HLIST_NODE(&n_ptr->hash);
INIT_LIST_HEAD(&n_ptr->list);
@@ -120,16 +140,17 @@ struct tipc_node *tipc_node_create(struct net *net, u32 addr)
list_add_tail_rcu(&n_ptr->list, &temp_node->list);
n_ptr->action_flags = TIPC_WAIT_PEER_LINKS_DOWN;
n_ptr->signature = INVALID_NODE_SIG;
+ tipc_node_get(n_ptr);
exit:
spin_unlock_bh(&tn->node_list_lock);
return n_ptr;
}
-static void tipc_node_delete(struct tipc_net *tn, struct tipc_node *n_ptr)
+static void tipc_node_delete(struct tipc_node *node)
{
- list_del_rcu(&n_ptr->list);
- hlist_del_rcu(&n_ptr->hash);
- kfree_rcu(n_ptr, rcu);
+ list_del_rcu(&node->list);
+ hlist_del_rcu(&node->hash);
+ kfree_rcu(node, rcu);
}
void tipc_node_stop(struct net *net)
@@ -139,7 +160,7 @@ void tipc_node_stop(struct net *net)
spin_lock_bh(&tn->node_list_lock);
list_for_each_entry_safe(node, t_node, &tn->node_list, list)
- tipc_node_delete(tn, node);
+ tipc_node_put(node);
spin_unlock_bh(&tn->node_list_lock);
}
@@ -147,6 +168,7 @@ int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port)
{
struct tipc_node *node;
struct tipc_sock_conn *conn;
+ int err = 0;
if (in_own_node(net, dnode))
return 0;
@@ -157,8 +179,10 @@ int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port)
return -EHOSTUNREACH;
}
conn = kmalloc(sizeof(*conn), GFP_ATOMIC);
- if (!conn)
- return -EHOSTUNREACH;
+ if (!conn) {
+ err = -EHOSTUNREACH;
+ goto exit;
+ }
conn->peer_node = dnode;
conn->port = port;
conn->peer_port = peer_port;
@@ -166,7 +190,9 @@ int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port)
tipc_node_lock(node);
list_add_tail(&conn->list, &node->conn_sks);
tipc_node_unlock(node);
- return 0;
+exit:
+ tipc_node_put(node);
+ return err;
}
void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port)
@@ -189,6 +215,7 @@ void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port)
kfree(conn);
}
tipc_node_unlock(node);
+ tipc_node_put(node);
}
/**
@@ -417,19 +444,25 @@ int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 addr,
char *linkname, size_t len)
{
struct tipc_link *link;
+ int err = -EINVAL;
struct tipc_node *node = tipc_node_find(net, addr);
- if ((bearer_id >= MAX_BEARERS) || !node)
- return -EINVAL;
+ if (!node)
+ return err;
+
+ if (bearer_id >= MAX_BEARERS)
+ goto exit;
+
tipc_node_lock(node);
link = node->links[bearer_id];
if (link) {
strncpy(linkname, link->name, len);
- tipc_node_unlock(node);
- return 0;
+ err = 0;
}
+exit:
tipc_node_unlock(node);
- return -EINVAL;
+ tipc_node_put(node);
+ return err;
}
void tipc_node_unlock(struct tipc_node *node)
@@ -459,7 +492,7 @@ void tipc_node_unlock(struct tipc_node *node)
TIPC_NOTIFY_NODE_DOWN | TIPC_NOTIFY_NODE_UP |
TIPC_NOTIFY_LINK_DOWN | TIPC_NOTIFY_LINK_UP |
TIPC_WAKEUP_BCAST_USERS | TIPC_BCAST_MSG_EVT |
- TIPC_NAMED_MSG_EVT);
+ TIPC_NAMED_MSG_EVT | TIPC_BCAST_RESET);
spin_unlock_bh(&node->lock);
@@ -488,6 +521,9 @@ void tipc_node_unlock(struct tipc_node *node)
if (flags & TIPC_BCAST_MSG_EVT)
tipc_bclink_input(net);
+
+ if (flags & TIPC_BCAST_RESET)
+ tipc_link_reset_all(node);
}
/* Caller should hold node lock for the passed node */
@@ -542,17 +578,21 @@ int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb)
msg.seq = cb->nlh->nlmsg_seq;
rcu_read_lock();
-
- if (last_addr && !tipc_node_find(net, last_addr)) {
- rcu_read_unlock();
- /* We never set seq or call nl_dump_check_consistent() this
- * means that setting prev_seq here will cause the consistence
- * check to fail in the netlink callback handler. Resulting in
- * the NLMSG_DONE message having the NLM_F_DUMP_INTR flag set if
- * the node state changed while we released the lock.
- */
- cb->prev_seq = 1;
- return -EPIPE;
+ if (last_addr) {
+ node = tipc_node_find(net, last_addr);
+ if (!node) {
+ rcu_read_unlock();
+ /* We never set seq or call nl_dump_check_consistent()
+ * this means that setting prev_seq here will cause the
+ * consistence check to fail in the netlink callback
+ * handler. Resulting in the NLMSG_DONE message having
+ * the NLM_F_DUMP_INTR flag set if the node state
+ * changed while we released the lock.
+ */
+ cb->prev_seq = 1;
+ return -EPIPE;
+ }
+ tipc_node_put(node);
}
list_for_each_entry_rcu(node, &tn->node_list, list) {
diff --git a/net/tipc/node.h b/net/tipc/node.h
index e89ac04ec2c3..02d5c20dc551 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -64,7 +64,8 @@ enum {
TIPC_NOTIFY_LINK_UP = (1 << 6),
TIPC_NOTIFY_LINK_DOWN = (1 << 7),
TIPC_NAMED_MSG_EVT = (1 << 8),
- TIPC_BCAST_MSG_EVT = (1 << 9)
+ TIPC_BCAST_MSG_EVT = (1 << 9),
+ TIPC_BCAST_RESET = (1 << 10)
};
/**
@@ -93,6 +94,7 @@ struct tipc_node_bclink {
/**
* struct tipc_node - TIPC node structure
* @addr: network address of node
+ * @ref: reference counter to node object
* @lock: spinlock governing access to structure
* @net: the applicable net namespace
* @hash: links to adjacent nodes in unsorted hash chain
@@ -114,6 +116,7 @@ struct tipc_node_bclink {
*/
struct tipc_node {
u32 addr;
+ struct kref kref;
spinlock_t lock;
struct net *net;
struct hlist_node hash;
@@ -136,6 +139,7 @@ struct tipc_node {
};
struct tipc_node *tipc_node_find(struct net *net, u32 addr);
+void tipc_node_put(struct tipc_node *node);
struct tipc_node *tipc_node_create(struct net *net, u32 addr);
void tipc_node_stop(struct net *net);
void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
@@ -170,10 +174,12 @@ static inline uint tipc_node_get_mtu(struct net *net, u32 addr, u32 selector)
node = tipc_node_find(net, addr);
- if (likely(node))
+ if (likely(node)) {
mtu = node->act_mtus[selector & 1];
- else
+ tipc_node_put(node);
+ } else {
mtu = MAX_MSG_SIZE;
+ }
return mtu;
}
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-24 11:22:35 +0300