1 files changed, 137 insertions, 145 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index 1d37a8086bed..e3a18ff0c38b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -156,7 +156,7 @@ typedef __u64 __bitwise __addrpair;
  */
 struct sock_common {
         /* skc_daddr and skc_rcv_saddr must be grouped on a 8 bytes aligned
-         * address on 64bit arches : cf INET_MATCH() and INET_TW_MATCH()
+         * address on 64bit arches : cf INET_MATCH()
          */
         union {
                 __addrpair      skc_addrpair;
@@ -191,6 +191,12 @@ struct sock_common {
 #ifdef CONFIG_NET_NS
         struct net              *skc_net;
 #endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+        struct in6_addr         skc_v6_daddr;
+        struct in6_addr         skc_v6_rcv_saddr;
+#endif
+
         /*
          * fields between dontcopy_begin/dontcopy_end
          * are not copied in sock_copy()
@@ -218,7 +224,7 @@ struct cg_proto;
   *     @sk_lock:       synchronizer
   *     @sk_rcvbuf: size of receive buffer in bytes
   *     @sk_wq: sock wait queue and async head
-  *     @sk_rx_dst: receive input route used by early tcp demux
+  *     @sk_rx_dst: receive input route used by early demux
   *     @sk_dst_cache: destination cache
   *     @sk_dst_lock: destination cache lock
   *     @sk_policy: flow policy
@@ -233,6 +239,7 @@ struct cg_proto;
   *     @sk_ll_usec: usecs to busypoll when there is no data
   *     @sk_allocation: allocation mode
   *     @sk_pacing_rate: Pacing rate (if supported by transport/packet scheduler)
+  *     @sk_max_pacing_rate: Maximum pacing rate (%SO_MAX_PACING_RATE)
   *     @sk_sndbuf: size of send buffer in bytes
   *     @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
   *                %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
@@ -299,6 +306,12 @@ struct sock {
 #define sk_dontcopy_begin       __sk_common.skc_dontcopy_begin
 #define sk_dontcopy_end         __sk_common.skc_dontcopy_end
 #define sk_hash                 __sk_common.skc_hash
+#define sk_portpair             __sk_common.skc_portpair
+#define sk_num                  __sk_common.skc_num
+#define sk_dport                __sk_common.skc_dport
+#define sk_addrpair             __sk_common.skc_addrpair
+#define sk_daddr                __sk_common.skc_daddr
+#define sk_rcv_saddr            __sk_common.skc_rcv_saddr
 #define sk_family               __sk_common.skc_family
 #define sk_state                __sk_common.skc_state
 #define sk_reuse                __sk_common.skc_reuse
@@ -307,6 +320,9 @@ struct sock {
 #define sk_bind_node            __sk_common.skc_bind_node
 #define sk_prot                 __sk_common.skc_prot
 #define sk_net                  __sk_common.skc_net
+#define sk_v6_daddr             __sk_common.skc_v6_daddr
+#define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr
+
         socket_lock_t           sk_lock;
         struct sk_buff_head     sk_receive_queue;
         /*
@@ -363,6 +379,7 @@ struct sock {
         int                     sk_wmem_queued;
         gfp_t                   sk_allocation;
         u32                     sk_pacing_rate; /* bytes per second */
+        u32                     sk_max_pacing_rate;
         netdev_features_t       sk_route_caps;
         netdev_features_t       sk_route_nocaps;
         int                     sk_gso_type;
@@ -751,7 +768,7 @@ static inline int sk_stream_wspace(const struct sock *sk)
         return sk->sk_sndbuf - sk->sk_wmem_queued;
 }
 
-extern void sk_stream_write_space(struct sock *sk);
+void sk_stream_write_space(struct sock *sk);
 
 /* OOB backlog add */
 static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
@@ -793,7 +810,7 @@ static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *s
         return 0;
 }
 
-extern int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
 
 static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
 {
@@ -858,15 +875,15 @@ static inline void sock_rps_reset_rxhash(struct sock *sk)
                 __rc;                                                   \
         })
 
-extern int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
-extern int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
-extern void sk_stream_wait_close(struct sock *sk, long timeo_p);
-extern int sk_stream_error(struct sock *sk, int flags, int err);
-extern void sk_stream_kill_queues(struct sock *sk);
-extern void sk_set_memalloc(struct sock *sk);
-extern void sk_clear_memalloc(struct sock *sk);
+int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
+int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
+void sk_stream_wait_close(struct sock *sk, long timeo_p);
+int sk_stream_error(struct sock *sk, int flags, int err);
+void sk_stream_kill_queues(struct sock *sk);
+void sk_set_memalloc(struct sock *sk);
+void sk_clear_memalloc(struct sock *sk);
 
-extern int sk_wait_data(struct sock *sk, long *timeo);
+int sk_wait_data(struct sock *sk, long *timeo);
 
 struct request_sock_ops;
 struct timewait_sock_ops;
@@ -1019,10 +1036,10 @@ enum cg_proto_flags {
 
 struct cg_proto {
         void                    (*enter_memory_pressure)(struct sock *sk);
-        struct res_counter      *memory_allocated;      /* Current allocated memory. */
-        struct percpu_counter   *sockets_allocated;     /* Current number of sockets. */
-        int                     *memory_pressure;
-        long                    *sysctl_mem;
+        struct res_counter      memory_allocated;       /* Current allocated memory. */
+        struct percpu_counter   sockets_allocated;      /* Current number of sockets. */
+        int                     memory_pressure;
+        long                    sysctl_mem[3];
         unsigned long           flags;
         /*
          * memcg field is used to find which memcg we belong directly
@@ -1036,8 +1053,8 @@ struct cg_proto {
         struct mem_cgroup       *memcg;
 };
 
-extern int proto_register(struct proto *prot, int alloc_slab);
-extern void proto_unregister(struct proto *prot);
+int proto_register(struct proto *prot, int alloc_slab);
+void proto_unregister(struct proto *prot);
 
 static inline bool memcg_proto_active(struct cg_proto *cg_proto)
 {
@@ -1118,7 +1135,7 @@ static inline bool sk_under_memory_pressure(const struct sock *sk)
                 return false;
 
         if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-                return !!*sk->sk_cgrp->memory_pressure;
+                return !!sk->sk_cgrp->memory_pressure;
 
         return !!*sk->sk_prot->memory_pressure;
 }
@@ -1138,8 +1155,8 @@ static inline void sk_leave_memory_pressure(struct sock *sk)
                 struct proto *prot = sk->sk_prot;
 
                 for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
-                        if (*cg_proto->memory_pressure)
-                                *cg_proto->memory_pressure = 0;
+                        if (cg_proto->memory_pressure)
+                                cg_proto->memory_pressure = 0;
         }
 
 }
@@ -1175,7 +1192,7 @@ static inline void memcg_memory_allocated_add(struct cg_proto *prot,
         struct res_counter *fail;
         int ret;
 
-        ret = res_counter_charge_nofail(prot->memory_allocated,
+        ret = res_counter_charge_nofail(&prot->memory_allocated,
                                         amt << PAGE_SHIFT, &fail);
         if (ret < 0)
                 *parent_status = OVER_LIMIT;
@@ -1184,13 +1201,13 @@ static inline void memcg_memory_allocated_add(struct cg_proto *prot,
 static inline void memcg_memory_allocated_sub(struct cg_proto *prot,
                                               unsigned long amt)
 {
-        res_counter_uncharge(prot->memory_allocated, amt << PAGE_SHIFT);
+        res_counter_uncharge(&prot->memory_allocated, amt << PAGE_SHIFT);
 }
 
 static inline u64 memcg_memory_allocated_read(struct cg_proto *prot)
 {
         u64 ret;
-        ret = res_counter_read_u64(prot->memory_allocated, RES_USAGE);
+        ret = res_counter_read_u64(&prot->memory_allocated, RES_USAGE);
         return ret >> PAGE_SHIFT;
 }
 
@@ -1238,7 +1255,7 @@ static inline void sk_sockets_allocated_dec(struct sock *sk)
                 struct cg_proto *cg_proto = sk->sk_cgrp;
 
                 for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
-                        percpu_counter_dec(cg_proto->sockets_allocated);
+                        percpu_counter_dec(&cg_proto->sockets_allocated);
         }
 
         percpu_counter_dec(prot->sockets_allocated);
@@ -1252,7 +1269,7 @@ static inline void sk_sockets_allocated_inc(struct sock *sk)
                 struct cg_proto *cg_proto = sk->sk_cgrp;
 
                 for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
-                        percpu_counter_inc(cg_proto->sockets_allocated);
+                        percpu_counter_inc(&cg_proto->sockets_allocated);
         }
 
         percpu_counter_inc(prot->sockets_allocated);
@@ -1264,7 +1281,7 @@ sk_sockets_allocated_read_positive(struct sock *sk)
         struct proto *prot = sk->sk_prot;
 
         if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-                return percpu_counter_read_positive(sk->sk_cgrp->sockets_allocated);
+                return percpu_counter_read_positive(&sk->sk_cgrp->sockets_allocated);
 
         return percpu_counter_read_positive(prot->sockets_allocated);
 }
@@ -1292,8 +1309,8 @@ proto_memory_pressure(struct proto *prot)
 
 #ifdef CONFIG_PROC_FS
 /* Called with local bh disabled */
-extern void sock_prot_inuse_add(struct net *net, struct proto *prot, int inc);
-extern int sock_prot_inuse_get(struct net *net, struct proto *proto);
+void sock_prot_inuse_add(struct net *net, struct proto *prot, int inc);
+int sock_prot_inuse_get(struct net *net, struct proto *proto);
 #else
 static inline void sock_prot_inuse_add(struct net *net, struct proto *prot,
                 int inc)
@@ -1369,8 +1386,8 @@ static inline struct inode *SOCK_INODE(struct socket *socket)
 /*
  * Functions for memory accounting
  */
-extern int __sk_mem_schedule(struct sock *sk, int size, int kind);
-extern void __sk_mem_reclaim(struct sock *sk);
+int __sk_mem_schedule(struct sock *sk, int size, int kind);
+void __sk_mem_reclaim(struct sock *sk);
 
 #define SK_MEM_QUANTUM ((int)PAGE_SIZE)
 #define SK_MEM_QUANTUM_SHIFT ilog2(SK_MEM_QUANTUM)
@@ -1478,14 +1495,14 @@ do {									\
         lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0);     \
 } while (0)
 
-extern void lock_sock_nested(struct sock *sk, int subclass);
+void lock_sock_nested(struct sock *sk, int subclass);
 
 static inline void lock_sock(struct sock *sk)
 {
         lock_sock_nested(sk, 0);
 }
 
-extern void release_sock(struct sock *sk);
+void release_sock(struct sock *sk);
 
 /* BH context may only use the following locking interface. */
 #define bh_lock_sock(__sk)      spin_lock(&((__sk)->sk_lock.slock))
@@ -1494,7 +1511,7 @@ extern void release_sock(struct sock *sk);
                                 SINGLE_DEPTH_NESTING)
 #define bh_unlock_sock(__sk)    spin_unlock(&((__sk)->sk_lock.slock))
 
-extern bool lock_sock_fast(struct sock *sk);
+bool lock_sock_fast(struct sock *sk);
 /**
  * unlock_sock_fast - complement of lock_sock_fast
  * @sk: socket
@@ -1512,108 +1529,84 @@ static inline void unlock_sock_fast(struct sock *sk, bool slow)
 }
 
 
-extern struct sock              *sk_alloc(struct net *net, int family,
-                                          gfp_t priority,
-                                          struct proto *prot);
-extern void                     sk_free(struct sock *sk);
-extern void                     sk_release_kernel(struct sock *sk);
-extern struct sock              *sk_clone_lock(const struct sock *sk,
-                                               const gfp_t priority);
-
-extern struct sk_buff           *sock_wmalloc(struct sock *sk,
-                                              unsigned long size, int force,
-                                              gfp_t priority);
-extern struct sk_buff           *sock_rmalloc(struct sock *sk,
-                                              unsigned long size, int force,
-                                              gfp_t priority);
-extern void                     sock_wfree(struct sk_buff *skb);
-extern void                     skb_orphan_partial(struct sk_buff *skb);
-extern void                     sock_rfree(struct sk_buff *skb);
-extern void                     sock_edemux(struct sk_buff *skb);
-
-extern int                      sock_setsockopt(struct socket *sock, int level,
-                                                int op, char __user *optval,
-                                                unsigned int optlen);
-
-extern int                      sock_getsockopt(struct socket *sock, int level,
-                                                int op, char __user *optval,
-                                                int __user *optlen);
-extern struct sk_buff           *sock_alloc_send_skb(struct sock *sk,
-                                                     unsigned long size,
-                                                     int noblock,
-                                                     int *errcode);
-extern struct sk_buff           *sock_alloc_send_pskb(struct sock *sk,
-                                                      unsigned long header_len,
-                                                      unsigned long data_len,
-                                                      int noblock,
-                                                      int *errcode,
-                                                      int max_page_order);
-extern void *sock_kmalloc(struct sock *sk, int size,
-                          gfp_t priority);
-extern void sock_kfree_s(struct sock *sk, void *mem, int size);
-extern void sk_send_sigurg(struct sock *sk);
+struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
+                      struct proto *prot);
+void sk_free(struct sock *sk);
+void sk_release_kernel(struct sock *sk);
+struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
+
+struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
+                             gfp_t priority);
+struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force,
+                             gfp_t priority);
+void sock_wfree(struct sk_buff *skb);
+void skb_orphan_partial(struct sk_buff *skb);
+void sock_rfree(struct sk_buff *skb);
+void sock_edemux(struct sk_buff *skb);
+
+int sock_setsockopt(struct socket *sock, int level, int op,
+                    char __user *optval, unsigned int optlen);
+
+int sock_getsockopt(struct socket *sock, int level, int op,
+                    char __user *optval, int __user *optlen);
+struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
+                                    int noblock, int *errcode);
+struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
+                                     unsigned long data_len, int noblock,
+                                     int *errcode, int max_page_order);
+void *sock_kmalloc(struct sock *sk, int size, gfp_t priority);
+void sock_kfree_s(struct sock *sk, void *mem, int size);
+void sk_send_sigurg(struct sock *sk);
 
 /*
  * Functions to fill in entries in struct proto_ops when a protocol
  * does not implement a particular function.
  */
-extern int                      sock_no_bind(struct socket *,
-                                             struct sockaddr *, int);
-extern int                      sock_no_connect(struct socket *,
-                                                struct sockaddr *, int, int);
-extern int                      sock_no_socketpair(struct socket *,
-                                                   struct socket *);
-extern int                      sock_no_accept(struct socket *,
-                                               struct socket *, int);
-extern int                      sock_no_getname(struct socket *,
-                                                struct sockaddr *, int *, int);
-extern unsigned int             sock_no_poll(struct file *, struct socket *,
-                                             struct poll_table_struct *);
-extern int                      sock_no_ioctl(struct socket *, unsigned int,
-                                              unsigned long);
-extern int                      sock_no_listen(struct socket *, int);
-extern int                      sock_no_shutdown(struct socket *, int);
-extern int                      sock_no_getsockopt(struct socket *, int , int,
-                                                   char __user *, int __user *);
-extern int                      sock_no_setsockopt(struct socket *, int, int,
-                                                   char __user *, unsigned int);
-extern int                      sock_no_sendmsg(struct kiocb *, struct socket *,
-                                                struct msghdr *, size_t);
-extern int                      sock_no_recvmsg(struct kiocb *, struct socket *,
-                                                struct msghdr *, size_t, int);
-extern int                      sock_no_mmap(struct file *file,
-                                             struct socket *sock,
-                                             struct vm_area_struct *vma);
-extern ssize_t                  sock_no_sendpage(struct socket *sock,
-                                                struct page *page,
-                                                int offset, size_t size,
-                                                int flags);
+int sock_no_bind(struct socket *, struct sockaddr *, int);
+int sock_no_connect(struct socket *, struct sockaddr *, int, int);
+int sock_no_socketpair(struct socket *, struct socket *);
+int sock_no_accept(struct socket *, struct socket *, int);
+int sock_no_getname(struct socket *, struct sockaddr *, int *, int);
+unsigned int sock_no_poll(struct file *, struct socket *,
+                          struct poll_table_struct *);
+int sock_no_ioctl(struct socket *, unsigned int, unsigned long);
+int sock_no_listen(struct socket *, int);
+int sock_no_shutdown(struct socket *, int);
+int sock_no_getsockopt(struct socket *, int , int, char __user *, int __user *);
+int sock_no_setsockopt(struct socket *, int, int, char __user *, unsigned int);
+int sock_no_sendmsg(struct kiocb *, struct socket *, struct msghdr *, size_t);
+int sock_no_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t,
+                    int);
+int sock_no_mmap(struct file *file, struct socket *sock,
+                 struct vm_area_struct *vma);
+ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
+                         size_t size, int flags);
 
 /*
  * Functions to fill in entries in struct proto_ops when a protocol
  * uses the inet style.
  */
-extern int sock_common_getsockopt(struct socket *sock, int level, int optname,
+int sock_common_getsockopt(struct socket *sock, int level, int optname,
                                   char __user *optval, int __user *optlen);
-extern int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
+int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
                                struct msghdr *msg, size_t size, int flags);
-extern int sock_common_setsockopt(struct socket *sock, int level, int optname,
+int sock_common_setsockopt(struct socket *sock, int level, int optname,
                                   char __user *optval, unsigned int optlen);
-extern int compat_sock_common_getsockopt(struct socket *sock, int level,
+int compat_sock_common_getsockopt(struct socket *sock, int level,
                 int optname, char __user *optval, int __user *optlen);
-extern int compat_sock_common_setsockopt(struct socket *sock, int level,
+int compat_sock_common_setsockopt(struct socket *sock, int level,
                 int optname, char __user *optval, unsigned int optlen);
 
-extern void sk_common_release(struct sock *sk);
+void sk_common_release(struct sock *sk);
 
 /*
  *      Default socket callbacks and setup code
  */
 
 /* Initialise core socket variables */
-extern void sock_init_data(struct socket *sock, struct sock *sk);
+void sock_init_data(struct socket *sock, struct sock *sk);
 
-extern void sk_filter_release_rcu(struct rcu_head *rcu);
+void sk_filter_release_rcu(struct rcu_head *rcu);
 
 /**
  *      sk_filter_release - release a socket filter
@@ -1630,16 +1623,14 @@ static inline void sk_filter_release(struct sk_filter *fp)
 
 static inline void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp)
 {
-        unsigned int size = sk_filter_len(fp);
-
-        atomic_sub(size, &sk->sk_omem_alloc);
+        atomic_sub(sk_filter_size(fp->len), &sk->sk_omem_alloc);
         sk_filter_release(fp);
 }
 
 static inline void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
 {
         atomic_inc(&fp->refcnt);
-        atomic_add(sk_filter_len(fp), &sk->sk_omem_alloc);
+        atomic_add(sk_filter_size(fp->len), &sk->sk_omem_alloc);
 }
 
 /*
@@ -1673,9 +1664,12 @@ static inline void sock_put(struct sock *sk)
         if (atomic_dec_and_test(&sk->sk_refcnt))
                 sk_free(sk);
 }
+/* Generic version of sock_put(), dealing with all sockets
+ * (TCP_TIMEWAIT, ESTABLISHED...)
+ */
+void sock_gen_put(struct sock *sk);
 
-extern int sk_receive_skb(struct sock *sk, struct sk_buff *skb,
-                          const int nested);
+int sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested);
 
 static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)
 {
@@ -1729,8 +1723,8 @@ static inline void sock_graft(struct sock *sk, struct socket *parent)
         write_unlock_bh(&sk->sk_callback_lock);
 }
 
-extern kuid_t sock_i_uid(struct sock *sk);
-extern unsigned long sock_i_ino(struct sock *sk);
+kuid_t sock_i_uid(struct sock *sk);
+unsigned long sock_i_ino(struct sock *sk);
 
 static inline struct dst_entry *
 __sk_dst_get(struct sock *sk)
@@ -1752,8 +1746,6 @@ sk_dst_get(struct sock *sk)
         return dst;
 }
 
-extern void sk_reset_txq(struct sock *sk);
-
 static inline void dst_negative_advice(struct sock *sk)
 {
         struct dst_entry *ndst, *dst = __sk_dst_get(sk);
@@ -1763,7 +1755,7 @@ static inline void dst_negative_advice(struct sock *sk)
 
                 if (ndst != dst) {
                         rcu_assign_pointer(sk->sk_dst_cache, ndst);
-                        sk_reset_txq(sk);
+                        sk_tx_queue_clear(sk);
                 }
         }
 }
@@ -1805,16 +1797,16 @@ sk_dst_reset(struct sock *sk)
         spin_unlock(&sk->sk_dst_lock);
 }
 
-extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
+struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
 
-extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
+struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
 
 static inline bool sk_can_gso(const struct sock *sk)
 {
         return net_gso_ok(sk->sk_route_caps, sk->sk_gso_type);
 }
 
-extern void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
+void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
 
 static inline void sk_nocaps_add(struct sock *sk, netdev_features_t flags)
 {
@@ -2027,14 +2019,14 @@ static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
         sk_mem_charge(sk, skb->truesize);
 }
 
-extern void sk_reset_timer(struct sock *sk, struct timer_list *timer,
-                           unsigned long expires);
+void sk_reset_timer(struct sock *sk, struct timer_list *timer,
+                    unsigned long expires);
 
-extern void sk_stop_timer(struct sock *sk, struct timer_list *timer);
+void sk_stop_timer(struct sock *sk, struct timer_list *timer);
 
-extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 
-extern int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
+int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
 
 /*
  *      Recover an error report and clear atomically
@@ -2102,7 +2094,7 @@ static inline struct page_frag *sk_page_frag(struct sock *sk)
         return &sk->sk_frag;
 }
 
-extern bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
+bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
 
 /*
  *      Default write policy as shown to user space via poll/select/SIGIO
@@ -2140,10 +2132,10 @@ static inline int sock_intr_errno(long timeo)
         return timeo == MAX_SCHEDULE_TIMEOUT ? -ERESTARTSYS : -EINTR;
 }
 
-extern void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
-        struct sk_buff *skb);
-extern void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
-        struct sk_buff *skb);
+void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
+                           struct sk_buff *skb);
+void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
+                             struct sk_buff *skb);
 
 static inline void
 sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
@@ -2176,8 +2168,8 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
                 __sock_recv_wifi_status(msg, sk, skb);
 }
 
-extern void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
-                                     struct sk_buff *skb);
+void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
+                              struct sk_buff *skb);
 
 static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
                                           struct sk_buff *skb)
@@ -2202,7 +2194,7 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
  *
  * Currently only depends on SOCK_TIMESTAMPING* flags.
  */
-extern void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
+void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
 
 /**
  * sk_eat_skb - Release a skb if it is no longer needed
@@ -2266,11 +2258,11 @@ static inline struct sock *skb_steal_sock(struct sk_buff *skb)
         return NULL;
 }
 
-extern void sock_enable_timestamp(struct sock *sk, int flag);
-extern int sock_get_timestamp(struct sock *, struct timeval __user *);
-extern int sock_get_timestampns(struct sock *, struct timespec __user *);
-extern int sock_recv_errqueue(struct sock *sk, struct msghdr *msg, int len,
-                              int level, int type);
+void sock_enable_timestamp(struct sock *sk, int flag);
+int sock_get_timestamp(struct sock *, struct timeval __user *);
+int sock_get_timestampns(struct sock *, struct timespec __user *);
+int sock_recv_errqueue(struct sock *sk, struct msghdr *msg, int len, int level,
+                       int type);
 
 /*
  *      Enable debug/info messages