14 files changed, 149 insertions, 66 deletions

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index b8eb51a661e5..beede1e1a919 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -336,6 +336,9 @@ enum p9_qid_t {
 #define P9_NOFID	(u32)(~0)
 #define P9_MAXWELEM	16
 
+/* Minimal header size: size[4] type[1] tag[2] */
+#define P9_HDRSZ	7
+
 /* ample room for Twrite/Rread header */
 #define P9_IOHDRSZ	24
 
@@ -558,19 +561,12 @@ struct p9_fcall {
 	size_t offset;
 	size_t capacity;
 
+	struct kmem_cache *cache;
 	u8 *sdata;
 };
 
-struct p9_idpool;
-
 int p9_errstr2errno(char *errstr, int len);
 
-struct p9_idpool *p9_idpool_create(void);
-void p9_idpool_destroy(struct p9_idpool *);
-int p9_idpool_get(struct p9_idpool *p);
-void p9_idpool_put(int id, struct p9_idpool *p);
-int p9_idpool_check(int id, struct p9_idpool *p);
-
 int p9_error_init(void);
 int p9_trans_fd_init(void);
 void p9_trans_fd_exit(void);
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 0fa0fbab33b0..947a570307a6 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -64,22 +64,15 @@ enum p9_trans_status {
 
 /**
  * enum p9_req_status_t - status of a request
- * @REQ_STATUS_IDLE: request slot unused
  * @REQ_STATUS_ALLOC: request has been allocated but not sent
  * @REQ_STATUS_UNSENT: request waiting to be sent
  * @REQ_STATUS_SENT: request sent to server
  * @REQ_STATUS_RCVD: response received from server
  * @REQ_STATUS_FLSHD: request has been flushed
  * @REQ_STATUS_ERROR: request encountered an error on the client side
- *
- * The @REQ_STATUS_IDLE state is used to mark a request slot as unused
- * but use is actually tracked by the idpool structure which handles tag
- * id allocation.
- *
  */
 
 enum p9_req_status_t {
-	REQ_STATUS_IDLE,
 	REQ_STATUS_ALLOC,
 	REQ_STATUS_UNSENT,
 	REQ_STATUS_SENT,
@@ -92,70 +85,46 @@ enum p9_req_status_t {
  * struct p9_req_t - request slots
  * @status: status of this request slot
  * @t_err: transport error
- * @flush_tag: tag of request being flushed (for flush requests)
  * @wq: wait_queue for the client to block on for this request
  * @tc: the request fcall structure
  * @rc: the response fcall structure
  * @aux: transport specific data (provided for trans_fd migration)
  * @req_list: link for higher level objects to chain requests
- *
- * Transport use an array to track outstanding requests
- * instead of a list.  While this may incurr overhead during initial
- * allocation or expansion, it makes request lookup much easier as the
- * tag id is a index into an array.  (We use tag+1 so that we can accommodate
- * the -1 tag for the T_VERSION request).
- * This also has the nice effect of only having to allocate wait_queues
- * once, instead of constantly allocating and freeing them.  Its possible
- * other resources could benefit from this scheme as well.
- *
  */
-
 struct p9_req_t {
 	int status;
 	int t_err;
+	struct kref refcount;
 	wait_queue_head_t wq;
-	struct p9_fcall *tc;
-	struct p9_fcall *rc;
+	struct p9_fcall tc;
+	struct p9_fcall rc;
 	void *aux;
-
 	struct list_head req_list;
 };
 
 /**
  * struct p9_client - per client instance state
- * @lock: protect @fidlist
+ * @lock: protect @fids and @reqs
  * @msize: maximum data size negotiated by protocol
- * @dotu: extension flags negotiated by protocol
  * @proto_version: 9P protocol version to use
  * @trans_mod: module API instantiated with this client
+ * @status: connection state
  * @trans: tranport instance state and API
  * @fids: All active FID handles
- * @tagpool - transaction id accounting for session
- * @reqs - 2D array of requests
- * @max_tag - current maximum tag id allocated
- * @name - node name used as client id
+ * @reqs: All active requests.
+ * @name: node name used as client id
  *
  * The client structure is used to keep track of various per-client
  * state that has been instantiated.
- * In order to minimize per-transaction overhead we use a
- * simple array to lookup requests instead of a hash table
- * or linked list.  In order to support larger number of
- * transactions, we make this a 2D array, allocating new rows
- * when we need to grow the total number of the transactions.
- *
- * Each row is 256 requests and we'll support up to 256 rows for
- * a total of 64k concurrent requests per session.
- *
- * Bugs: duplicated data and potentially unnecessary elements.
  */
-
 struct p9_client {
-	spinlock_t lock; /* protect client structure */
+	spinlock_t lock;
 	unsigned int msize;
 	unsigned char proto_version;
 	struct p9_trans_module *trans_mod;
 	enum p9_trans_status status;
 	void *trans;
+	struct kmem_cache *fcall_cache;
 
 	union {
 		struct {
@@ -170,10 +139,7 @@ struct p9_client {
 	} trans_opts;
 
 	struct idr fids;
-
-	struct p9_idpool *tagpool;
-	struct p9_req_t *reqs[P9_ROW_MAXTAG];
-	int max_tag;
+	struct idr reqs;
 
 	char name[__NEW_UTS_LEN + 1];
 };
@@ -266,7 +232,21 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, const char *name, int mode,
 				kgid_t gid, struct p9_qid *);
 int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status);
 int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl);
+void p9_fcall_fini(struct p9_fcall *fc);
 struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);
+
+static inline void p9_req_get(struct p9_req_t *r)
+{
+	kref_get(&r->refcount);
+}
+
+static inline int p9_req_try_get(struct p9_req_t *r)
+{
+	return kref_get_unless_zero(&r->refcount);
+}
+
+int p9_req_put(struct p9_req_t *r);
+
 void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status);
 
 int p9_parse_header(struct p9_fcall *, int32_t *, int8_t *, int16_t *, int);
@@ -279,4 +259,7 @@ struct p9_fid *p9_client_xattrwalk(struct p9_fid *, const char *, u64 *);
 int p9_client_xattrcreate(struct p9_fid *, const char *, u64, int);
 int p9_client_readlink(struct p9_fid *fid, char **target);
 
+int p9_client_init(void);
+void p9_client_exit(void);
+
 #endif /* NET_9P_CLIENT_H */
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 14b789a123e7..1656c5978498 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -317,6 +317,8 @@ bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
 			 const struct in6_addr *addr);
 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
 			     const struct in6_addr *addr);
+int ipv6_anycast_init(void);
+void ipv6_anycast_cleanup(void);
 
 /* Device notifier */
 int register_inet6addr_notifier(struct notifier_block *nb);
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index de587948042a..1adefe42c0a6 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -77,7 +77,8 @@ int rxrpc_kernel_retry_call(struct socket *, struct rxrpc_call *,
 			    struct sockaddr_rxrpc *, struct key *);
 int rxrpc_kernel_check_call(struct socket *, struct rxrpc_call *,
 			    enum rxrpc_call_completion *, u32 *);
-u32 rxrpc_kernel_check_life(struct socket *, struct rxrpc_call *);
+u32 rxrpc_kernel_check_life(const struct socket *, const struct rxrpc_call *);
+void rxrpc_kernel_probe_life(struct socket *, struct rxrpc_call *);
 u32 rxrpc_kernel_get_epoch(struct socket *, struct rxrpc_call *);
 bool rxrpc_kernel_get_reply_time(struct socket *, struct rxrpc_call *,
 				 ktime_t *);
diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index e2695c4bf358..ddbba838d048 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -13,7 +13,7 @@ void unix_notinflight(struct user_struct *user, struct file *fp);
 void unix_gc(void);
 void wait_for_unix_gc(void);
 struct sock *unix_get_socket(struct file *filp);
-struct sock *unix_peer_get(struct sock *);
+struct sock *unix_peer_get(struct sock *sk);
 
 #define UNIX_HASH_SIZE	256
 #define UNIX_HASH_BITS	8
@@ -40,7 +40,7 @@ struct unix_skb_parms {
 	u32			consumed;
 } __randomize_layout;
 
-#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
+#define UNIXCB(skb)	(*(struct unix_skb_parms *)&((skb)->cb))
 
 #define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
 #define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index d7578cf49c3a..c9c78c15bce0 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -146,10 +146,12 @@ struct ifacaddr6 {
 	struct in6_addr		aca_addr;
 	struct fib6_info	*aca_rt;
 	struct ifacaddr6	*aca_next;
+	struct hlist_node	aca_addr_lst;
 	int			aca_users;
 	refcount_t		aca_refcnt;
 	unsigned long		aca_cstamp;
 	unsigned long		aca_tstamp;
+	struct rcu_head		rcu;
 };
 
 #define	IFA_HOST	IPV6_ADDR_LOOPBACK
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index f58b384aa6c9..665990c7dec8 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -454,6 +454,7 @@ static inline int neigh_hh_bridge(struct hh_cache *hh, struct sk_buff *skb)
 
 static inline int neigh_hh_output(const struct hh_cache *hh, struct sk_buff *skb)
 {
+	unsigned int hh_alen = 0;
 	unsigned int seq;
 	unsigned int hh_len;
 
@@ -461,16 +462,33 @@ static inline int neigh_hh_output(const struct hh_cache *hh, struct sk_buff *skb
 		seq = read_seqbegin(&hh->hh_lock);
 		hh_len = hh->hh_len;
 		if (likely(hh_len <= HH_DATA_MOD)) {
-			/* this is inlined by gcc */
-			memcpy(skb->data - HH_DATA_MOD, hh->hh_data, HH_DATA_MOD);
+			hh_alen = HH_DATA_MOD;
+
+			/* skb_push() would proceed silently if we have room for
+			 * the unaligned size but not for the aligned size:
+			 * check headroom explicitly.
+			 */
+			if (likely(skb_headroom(skb) >= HH_DATA_MOD)) {
+				/* this is inlined by gcc */
+				memcpy(skb->data - HH_DATA_MOD, hh->hh_data,
+				       HH_DATA_MOD);
+			}
 		} else {
-			unsigned int hh_alen = HH_DATA_ALIGN(hh_len);
+			hh_alen = HH_DATA_ALIGN(hh_len);
 
-			memcpy(skb->data - hh_alen, hh->hh_data, hh_alen);
+			if (likely(skb_headroom(skb) >= hh_alen)) {
+				memcpy(skb->data - hh_alen, hh->hh_data,
+				       hh_alen);
+			}
 		}
 	} while (read_seqretry(&hh->hh_lock, seq));
 
-	skb_push(skb, hh_len);
+	if (WARN_ON_ONCE(skb_headroom(skb) < hh_alen)) {
+		kfree_skb(skb);
+		return NET_XMIT_DROP;
+	}
+
+	__skb_push(skb, hh_len);
 	return dev_queue_xmit(skb);
 }
 
diff --git a/include/net/netfilter/ipv4/nf_nat_masquerade.h b/include/net/netfilter/ipv4/nf_nat_masquerade.h
index cd24be4c4a99..13d55206bb9f 100644
--- a/include/net/netfilter/ipv4/nf_nat_masquerade.h
+++ b/include/net/netfilter/ipv4/nf_nat_masquerade.h
@@ -9,7 +9,7 @@ nf_nat_masquerade_ipv4(struct sk_buff *skb, unsigned int hooknum,
 		       const struct nf_nat_range2 *range,
 		       const struct net_device *out);
 
-void nf_nat_masquerade_ipv4_register_notifier(void);
+int nf_nat_masquerade_ipv4_register_notifier(void);
 void nf_nat_masquerade_ipv4_unregister_notifier(void);
 
 #endif /*_NF_NAT_MASQUERADE_IPV4_H_ */
diff --git a/include/net/netfilter/ipv6/nf_nat_masquerade.h b/include/net/netfilter/ipv6/nf_nat_masquerade.h
index 0c3b5ebf0bb8..2917bf95c437 100644
--- a/include/net/netfilter/ipv6/nf_nat_masquerade.h
+++ b/include/net/netfilter/ipv6/nf_nat_masquerade.h
@@ -5,7 +5,7 @@
 unsigned int
 nf_nat_masquerade_ipv6(struct sk_buff *skb, const struct nf_nat_range2 *range,
 		       const struct net_device *out);
-void nf_nat_masquerade_ipv6_register_notifier(void);
+int nf_nat_masquerade_ipv6_register_notifier(void);
 void nf_nat_masquerade_ipv6_unregister_notifier(void);
 
 #endif /* _NF_NAT_MASQUERADE_IPV6_H_ */
diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
index eed04af9b75e..ae7b86f587f2 100644
--- a/include/net/netfilter/nf_conntrack_l4proto.h
+++ b/include/net/netfilter/nf_conntrack_l4proto.h
@@ -153,4 +153,43 @@ void nf_ct_l4proto_log_invalid(const struct sk_buff *skb,
 			       const char *fmt, ...) { }
 #endif /* CONFIG_SYSCTL */
 
+static inline struct nf_generic_net *nf_generic_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.generic;
+}
+
+static inline struct nf_tcp_net *nf_tcp_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.tcp;
+}
+
+static inline struct nf_udp_net *nf_udp_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.udp;
+}
+
+static inline struct nf_icmp_net *nf_icmp_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.icmp;
+}
+
+static inline struct nf_icmp_net *nf_icmpv6_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.icmpv6;
+}
+
+#ifdef CONFIG_NF_CT_PROTO_DCCP
+static inline struct nf_dccp_net *nf_dccp_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.dccp;
+}
+#endif
+
+#ifdef CONFIG_NF_CT_PROTO_SCTP
+static inline struct nf_sctp_net *nf_sctp_pernet(struct net *net)
+{
+       return &net->ct.nf_ct_proto.sctp;
+}
+#endif
+
 #endif /*_NF_CONNTRACK_PROTOCOL_H*/
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 8c2caa370e0f..2abbc15824af 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -608,4 +608,21 @@ static inline __u32 sctp_dst_mtu(const struct dst_entry *dst)
 				 SCTP_DEFAULT_MINSEGMENT));
 }
 
+static inline bool sctp_transport_pmtu_check(struct sctp_transport *t)
+{
+	__u32 pmtu = sctp_dst_mtu(t->dst);
+
+	if (t->pathmtu == pmtu)
+		return true;
+
+	t->pathmtu = pmtu;
+
+	return false;
+}
+
+static inline __u32 sctp_min_frag_point(struct sctp_sock *sp, __u16 datasize)
+{
+	return sctp_mtu_payload(sp, SCTP_DEFAULT_MINSEGMENT, datasize);
+}
+
 #endif /* __net_sctp_h__ */
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index a11f93790476..feada358d872 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -2075,6 +2075,8 @@ struct sctp_association {
 
 	__u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
 	__u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
+
+	struct rcu_head rcu;
 };
 
 
diff --git a/include/net/sock.h b/include/net/sock.h
index f665d74ae509..0e3a09380655 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2340,22 +2340,39 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
 void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags);
 
 /**
- * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
+ * _sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
  * @sk:		socket sending this packet
  * @tsflags:	timestamping flags to use
  * @tx_flags:	completed with instructions for time stamping
+ * @tskey:      filled in with next sk_tskey (not for TCP, which uses seqno)
  *
  * Note: callers should take care of initial ``*tx_flags`` value (usually 0)
  */
-static inline void sock_tx_timestamp(const struct sock *sk, __u16 tsflags,
-				     __u8 *tx_flags)
+static inline void _sock_tx_timestamp(struct sock *sk, __u16 tsflags,
+				      __u8 *tx_flags, __u32 *tskey)
 {
-	if (unlikely(tsflags))
+	if (unlikely(tsflags)) {
 		__sock_tx_timestamp(tsflags, tx_flags);
+		if (tsflags & SOF_TIMESTAMPING_OPT_ID && tskey &&
+		    tsflags & SOF_TIMESTAMPING_TX_RECORD_MASK)
+			*tskey = sk->sk_tskey++;
+	}
 	if (unlikely(sock_flag(sk, SOCK_WIFI_STATUS)))
 		*tx_flags |= SKBTX_WIFI_STATUS;
 }
 
+static inline void sock_tx_timestamp(struct sock *sk, __u16 tsflags,
+				     __u8 *tx_flags)
+{
+	_sock_tx_timestamp(sk, tsflags, tx_flags, NULL);
+}
+
+static inline void skb_setup_tx_timestamp(struct sk_buff *skb, __u16 tsflags)
+{
+	_sock_tx_timestamp(skb->sk, tsflags, &skb_shinfo(skb)->tx_flags,
+			   &skb_shinfo(skb)->tskey);
+}
+
 /**
  * sk_eat_skb - Release a skb if it is no longer needed
  * @sk: socket to eat this skb from
diff --git a/include/net/tls.h b/include/net/tls.h
index bab5627ff5e3..3cbcd12303fd 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -76,6 +76,10 @@
  *
  * void (*unhash)(struct tls_device *device, struct sock *sk);
  *     This function cleans listen state set by Inline TLS driver
+ *
+ * void (*release)(struct kref *kref);
+ *     Release the registered device and allocated resources
+ * @kref: Number of reference to tls_device
  */
 struct tls_device {
 	char name[TLS_DEVICE_NAME_MAX];
@@ -83,6 +87,8 @@ struct tls_device {
 	int  (*feature)(struct tls_device *device);
 	int  (*hash)(struct tls_device *device, struct sock *sk);
 	void (*unhash)(struct tls_device *device, struct sock *sk);
+	void (*release)(struct kref *kref);
+	struct kref kref;
 };
 
 enum {