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-rw-r--r--include/net/dst.h2
-rw-r--r--include/net/inet_hashtables.h12
-rw-r--r--include/net/neighbour.h1
-rw-r--r--include/net/sock.h9
-rw-r--r--include/net/tcp.h11
-rw-r--r--include/net/x25.h3
6 files changed, 29 insertions, 9 deletions
diff --git a/include/net/dst.h b/include/net/dst.h
index fe62fe2eb781..8224dad2ae94 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -82,7 +82,7 @@ struct dst_entry {
struct dst_metrics {
u32 metrics[RTAX_MAX];
refcount_t refcnt;
-};
+} __aligned(4); /* Low pointer bits contain DST_METRICS_FLAGS */
extern const struct dst_metrics dst_default_metrics;
u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index af2b4c065a04..d0019d3395cf 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -103,13 +103,19 @@ struct inet_bind_hashbucket {
struct hlist_head chain;
};
-/*
- * Sockets can be hashed in established or listening table
+/* Sockets can be hashed in established or listening table.
+ * We must use different 'nulls' end-of-chain value for all hash buckets :
+ * A socket might transition from ESTABLISH to LISTEN state without
+ * RCU grace period. A lookup in ehash table needs to handle this case.
*/
+#define LISTENING_NULLS_BASE (1U << 29)
struct inet_listen_hashbucket {
spinlock_t lock;
unsigned int count;
- struct hlist_head head;
+ union {
+ struct hlist_head head;
+ struct hlist_nulls_head nulls_head;
+ };
};
/* This is for listening sockets, thus all sockets which possess wildcards. */
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 6ad9ad47a9c5..8ec77bfdc1a4 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -72,7 +72,6 @@ struct neigh_parms {
struct net_device *dev;
struct list_head list;
int (*neigh_setup)(struct neighbour *);
- void (*neigh_cleanup)(struct neighbour *);
struct neigh_table *tbl;
void *sysctl_table;
diff --git a/include/net/sock.h b/include/net/sock.h
index 80f996406bba..8dff68b4c316 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -722,6 +722,11 @@ static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_h
hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
}
+static inline void __sk_nulls_add_node_tail_rcu(struct sock *sk, struct hlist_nulls_head *list)
+{
+ hlist_nulls_add_tail_rcu(&sk->sk_nulls_node, list);
+}
+
static inline void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
{
sock_hold(sk);
@@ -2583,9 +2588,9 @@ static inline int sk_get_rmem0(const struct sock *sk, const struct proto *proto)
*/
static inline void sk_pacing_shift_update(struct sock *sk, int val)
{
- if (!sk || !sk_fullsock(sk) || sk->sk_pacing_shift == val)
+ if (!sk || !sk_fullsock(sk) || READ_ONCE(sk->sk_pacing_shift) == val)
return;
- sk->sk_pacing_shift = val;
+ WRITE_ONCE(sk->sk_pacing_shift, val);
}
/* if a socket is bound to a device, check that the given device
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 86b9a8766648..e460ea7f767b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1766,9 +1766,18 @@ static inline bool tcp_skb_is_last(const struct sock *sk,
return skb_queue_is_last(&sk->sk_write_queue, skb);
}
+/**
+ * tcp_write_queue_empty - test if any payload (or FIN) is available in write queue
+ * @sk: socket
+ *
+ * Since the write queue can have a temporary empty skb in it,
+ * we must not use "return skb_queue_empty(&sk->sk_write_queue)"
+ */
static inline bool tcp_write_queue_empty(const struct sock *sk)
{
- return skb_queue_empty(&sk->sk_write_queue);
+ const struct tcp_sock *tp = tcp_sk(sk);
+
+ return tp->write_seq == tp->snd_nxt;
}
static inline bool tcp_rtx_queue_empty(const struct sock *sk)
diff --git a/include/net/x25.h b/include/net/x25.h
index ed1acc3044ac..d7d6c2b4ffa7 100644
--- a/include/net/x25.h
+++ b/include/net/x25.h
@@ -62,7 +62,8 @@ enum {
X25_STATE_1, /* Awaiting Call Accepted */
X25_STATE_2, /* Awaiting Clear Confirmation */
X25_STATE_3, /* Data Transfer */
- X25_STATE_4 /* Awaiting Reset Confirmation */
+ X25_STATE_4, /* Awaiting Reset Confirmation */
+ X25_STATE_5 /* Call Accepted / Call Connected pending */
};
enum {