86 void SOCK_DEBUG(const struct sock *sk, const char *msg, ...)  in SOCK_DEBUG()
110 struct sock;
199 		struct sock	*skc_listener; /* request_sock */
324 struct sock {  struct
497 	void			(*sk_state_change)(struct sock *sk);  argument
498 	void			(*sk_data_ready)(struct sock *sk);  argument
499 	void			(*sk_write_space)(struct sock *sk);  argument
500 	void			(*sk_error_report)(struct sock *sk);  argument
501 	int			(*sk_backlog_rcv)(struct sock *sk,  argument
504 	struct sk_buff*		(*sk_validate_xmit_skb)(struct sock *sk,  argument
508 	void                    (*sk_destruct)(struct sock *sk);  argument
538 int sk_set_peek_off(struct sock *sk, int val);
540 static inline int sk_peek_offset(struct sock *sk, int flags)  in sk_peek_offset()
549 static inline void sk_peek_offset_bwd(struct sock *sk, int val)  in sk_peek_offset_bwd()
559 static inline void sk_peek_offset_fwd(struct sock *sk, int val)  in sk_peek_offset_fwd()
567 static inline struct sock *sk_entry(const struct hlist_node *node)  in sk_entry()
569 	return hlist_entry(node, struct sock, sk_node);  in sk_entry()
572 static inline struct sock *__sk_head(const struct hlist_head *head)  in __sk_head()
574 	return hlist_entry(head->first, struct sock, sk_node);  in __sk_head()
577 static inline struct sock *sk_head(const struct hlist_head *head)  in sk_head()
582 static inline struct sock *__sk_nulls_head(const struct hlist_nulls_head *head)  in __sk_nulls_head()
584 	return hlist_nulls_entry(head->first, struct sock, sk_nulls_node);  in __sk_nulls_head()
587 static inline struct sock *sk_nulls_head(const struct hlist_nulls_head *head)  in sk_nulls_head()
592 static inline struct sock *sk_next(const struct sock *sk)  in sk_next()
594 	return hlist_entry_safe(sk->sk_node.next, struct sock, sk_node);  in sk_next()
597 static inline struct sock *sk_nulls_next(const struct sock *sk)  in sk_nulls_next()
601 				  struct sock, sk_nulls_node) :  in sk_nulls_next()
605 static inline bool sk_unhashed(const struct sock *sk)  in sk_unhashed()
610 static inline bool sk_hashed(const struct sock *sk)  in sk_hashed()
625 static inline void __sk_del_node(struct sock *sk)  in __sk_del_node()
631 static inline bool __sk_del_node_init(struct sock *sk)  in __sk_del_node_init()
647 static __always_inline void sock_hold(struct sock *sk)  in sock_hold()
655 static __always_inline void __sock_put(struct sock *sk)  in __sock_put()
660 static inline bool sk_del_node_init(struct sock *sk)  in sk_del_node_init()
673 static inline bool __sk_nulls_del_node_init_rcu(struct sock *sk)  in __sk_nulls_del_node_init_rcu()
682 static inline bool sk_nulls_del_node_init_rcu(struct sock *sk)  in sk_nulls_del_node_init_rcu()
694 static inline void __sk_add_node(struct sock *sk, struct hlist_head *list)  in __sk_add_node()
699 static inline void sk_add_node(struct sock *sk, struct hlist_head *list)  in sk_add_node()
705 static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)  in sk_add_node_rcu()
715 static inline void sk_add_node_tail_rcu(struct sock *sk, struct hlist_head *list)  in sk_add_node_tail_rcu()
721 static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)  in __sk_nulls_add_node_rcu()
726 static inline void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)  in sk_nulls_add_node_rcu()
732 static inline void __sk_del_bind_node(struct sock *sk)  in __sk_del_bind_node()
737 static inline void sk_add_bind_node(struct sock *sk,  in sk_add_bind_node()
775 static inline struct user_namespace *sk_user_ns(struct sock *sk)  in sk_user_ns()
821 static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)  in sock_copy_flags()
826 static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)  in sock_set_flag()
831 static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)  in sock_reset_flag()
836 static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)  in sock_flag()
856 static inline gfp_t sk_gfp_mask(const struct sock *sk, gfp_t gfp_mask)  in sk_gfp_mask()
861 static inline void sk_acceptq_removed(struct sock *sk)  in sk_acceptq_removed()
866 static inline void sk_acceptq_added(struct sock *sk)  in sk_acceptq_added()
871 static inline bool sk_acceptq_is_full(const struct sock *sk)  in sk_acceptq_is_full()
879 static inline int sk_stream_min_wspace(const struct sock *sk)  in sk_stream_min_wspace()
884 static inline int sk_stream_wspace(const struct sock *sk)  in sk_stream_wspace()
889 static inline void sk_wmem_queued_add(struct sock *sk, int val)  in sk_wmem_queued_add()
894 void sk_stream_write_space(struct sock *sk);
897 static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)  in __sk_add_backlog()
916 static inline bool sk_rcvqueues_full(const struct sock *sk, unsigned int limit)  in sk_rcvqueues_full()
924 static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb,  in sk_add_backlog()
943 int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
945 static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)  in sk_backlog_rcv()
953 static inline void sk_incoming_cpu_update(struct sock *sk)  in sk_incoming_cpu_update()
973 static inline void sock_rps_record_flow(const struct sock *sk)  in sock_rps_record_flow()
993 static inline void sock_rps_save_rxhash(struct sock *sk,  in sock_rps_save_rxhash()
1002 static inline void sock_rps_reset_rxhash(struct sock *sk)  in sock_rps_reset_rxhash()
1024 int sk_stream_wait_connect(struct sock *sk, long *timeo_p);
1025 int sk_stream_wait_memory(struct sock *sk, long *timeo_p);
1026 void sk_stream_wait_close(struct sock *sk, long timeo_p);
1027 int sk_stream_error(struct sock *sk, int flags, int err);
1028 void sk_stream_kill_queues(struct sock *sk);
1029 void sk_set_memalloc(struct sock *sk);
1030 void sk_clear_memalloc(struct sock *sk);
1032 void __sk_flush_backlog(struct sock *sk);
1034 static inline bool sk_flush_backlog(struct sock *sk)  in sk_flush_backlog()
1043 int sk_wait_data(struct sock *sk, long *timeo, const struct sk_buff *skb);
1056 static inline void sk_prot_clear_nulls(struct sock *sk, int size)  in sk_prot_clear_nulls()
1058 	if (offsetof(struct sock, sk_node.next) != 0)  in sk_prot_clear_nulls()
1059 		memset(sk, 0, offsetof(struct sock, sk_node.next));  in sk_prot_clear_nulls()
1061 	       size - offsetof(struct sock, sk_node.pprev));  in sk_prot_clear_nulls()
1068 	void			(*close)(struct sock *sk,
1070 	int			(*pre_connect)(struct sock *sk,
1073 	int			(*connect)(struct sock *sk,
1076 	int			(*disconnect)(struct sock *sk, int flags);
1078 	struct sock *		(*accept)(struct sock *sk, int flags, int *err,
1081 	int			(*ioctl)(struct sock *sk, int cmd,
1083 	int			(*init)(struct sock *sk);
1084 	void			(*destroy)(struct sock *sk);
1085 	void			(*shutdown)(struct sock *sk, int how);
1086 	int			(*setsockopt)(struct sock *sk, int level,
1089 	int			(*getsockopt)(struct sock *sk, int level,
1092 	void			(*keepalive)(struct sock *sk, int valbool);
1094 	int			(*compat_setsockopt)(struct sock *sk,
1098 	int			(*compat_getsockopt)(struct sock *sk,
1102 	int			(*compat_ioctl)(struct sock *sk,
1105 	int			(*sendmsg)(struct sock *sk, struct msghdr *msg,
1107 	int			(*recvmsg)(struct sock *sk, struct msghdr *msg,
1110 	int			(*sendpage)(struct sock *sk, struct page *page,
1112 	int			(*bind)(struct sock *sk,
1115 	int			(*backlog_rcv) (struct sock *sk,
1118 	void		(*release_cb)(struct sock *sk);
1121 	int			(*hash)(struct sock *sk);
1122 	void			(*unhash)(struct sock *sk);
1123 	void			(*rehash)(struct sock *sk);
1124 	int			(*get_port)(struct sock *sk, unsigned short snum);
1131 	bool			(*stream_memory_free)(const struct sock *sk, int wake);
1132 	bool			(*stream_memory_read)(const struct sock *sk);
1134 	void			(*enter_memory_pressure)(struct sock *sk);
1135 	void			(*leave_memory_pressure)(struct sock *sk);
1181 	int			(*diag_destroy)(struct sock *sk, int err);
1189 static inline void sk_refcnt_debug_inc(struct sock *sk)  in sk_refcnt_debug_inc()
1194 static inline void sk_refcnt_debug_dec(struct sock *sk)  in sk_refcnt_debug_dec()
1201 static inline void sk_refcnt_debug_release(const struct sock *sk)  in sk_refcnt_debug_release()
1213 static inline bool __sk_stream_memory_free(const struct sock *sk, int wake)  in __sk_stream_memory_free()
1222 static inline bool sk_stream_memory_free(const struct sock *sk)  in sk_stream_memory_free()
1227 static inline bool __sk_stream_is_writeable(const struct sock *sk, int wake)  in __sk_stream_is_writeable()
1233 static inline bool sk_stream_is_writeable(const struct sock *sk)  in sk_stream_is_writeable()
1238 static inline int sk_under_cgroup_hierarchy(struct sock *sk,  in sk_under_cgroup_hierarchy()
1249 static inline bool sk_has_memory_pressure(const struct sock *sk)  in sk_has_memory_pressure()
1254 static inline bool sk_under_memory_pressure(const struct sock *sk)  in sk_under_memory_pressure()
1267 sk_memory_allocated(const struct sock *sk)  in sk_memory_allocated()
1273 sk_memory_allocated_add(struct sock *sk, int amt)  in sk_memory_allocated_add()
1279 sk_memory_allocated_sub(struct sock *sk, int amt)  in sk_memory_allocated_sub()
1284 static inline void sk_sockets_allocated_dec(struct sock *sk)  in sk_sockets_allocated_dec()
1289 static inline void sk_sockets_allocated_inc(struct sock *sk)  in sk_sockets_allocated_inc()
1295 sk_sockets_allocated_read_positive(struct sock *sk)  in sk_sockets_allocated_read_positive()
1337 static inline int __sk_prot_rehash(struct sock *sk)  in __sk_prot_rehash()
1376 int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind);
1377 int __sk_mem_schedule(struct sock *sk, int size, int kind);
1378 void __sk_mem_reduce_allocated(struct sock *sk, int amount);
1379 void __sk_mem_reclaim(struct sock *sk, int amount);
1390 static inline long sk_prot_mem_limits(const struct sock *sk, int index)  in sk_prot_mem_limits()
1407 static inline bool sk_has_account(struct sock *sk)  in sk_has_account()
1413 static inline bool sk_wmem_schedule(struct sock *sk, int size)  in sk_wmem_schedule()
1422 sk_rmem_schedule(struct sock *sk, struct sk_buff *skb, int size)  in sk_rmem_schedule()
1431 static inline void sk_mem_reclaim(struct sock *sk)  in sk_mem_reclaim()
1439 static inline void sk_mem_reclaim_partial(struct sock *sk)  in sk_mem_reclaim_partial()
1447 static inline void sk_mem_charge(struct sock *sk, int size)  in sk_mem_charge()
1454 static inline void sk_mem_uncharge(struct sock *sk, int size)  in sk_mem_uncharge()
1472 static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)  in sk_wmem_free_skb()
1486 static inline void sock_release_ownership(struct sock *sk)  in sock_release_ownership()
1516 static inline bool lockdep_sock_is_held(const struct sock *sk)  in lockdep_sock_is_held()
1523 void lock_sock_nested(struct sock *sk, int subclass);
1525 static inline void lock_sock(struct sock *sk)  in lock_sock()
1530 void __release_sock(struct sock *sk);
1531 void release_sock(struct sock *sk);
1540 bool lock_sock_fast(struct sock *sk);
1549 static inline void unlock_sock_fast(struct sock *sk, bool slow)  in unlock_sock_fast()
1571 static inline void sock_owned_by_me(const struct sock *sk)  in sock_owned_by_me()
1578 static inline bool sock_owned_by_user(const struct sock *sk)  in sock_owned_by_user()
1584 static inline bool sock_owned_by_user_nocheck(const struct sock *sk)  in sock_owned_by_user_nocheck()
1590 static inline bool sock_allow_reclassification(const struct sock *csk)  in sock_allow_reclassification()
1592 	struct sock *sk = (struct sock *)csk;  in sock_allow_reclassification()
1597 struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
1599 void sk_free(struct sock *sk);
1600 void sk_destruct(struct sock *sk);
1601 struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
1602 void sk_free_unlock_clone(struct sock *sk);
1604 struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
1608 struct sk_buff *sock_omalloc(struct sock *sk, unsigned long size,
1619 int sock_setsockopt(struct socket *sock, int level, int op,
1622 int sock_getsockopt(struct socket *sock, int level, int op,
1624 int sock_gettstamp(struct socket *sock, void __user *userstamp,
1626 struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
1628 struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
1631 void *sock_kmalloc(struct sock *sk, int size, gfp_t priority);
1632 void sock_kfree_s(struct sock *sk, void *mem, int size);
1633 void sock_kzfree_s(struct sock *sk, void *mem, int size);
1634 void sk_send_sigurg(struct sock *sk);
1643 			       const struct sock *sk)  in sockcm_init()
1648 int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
1650 int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
1668 int sock_no_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t len);
1670 int sock_no_mmap(struct file *file, struct socket *sock,
1672 ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset,
1674 ssize_t sock_no_sendpage_locked(struct sock *sk, struct page *page,
1681 int sock_common_getsockopt(struct socket *sock, int level, int optname,
1683 int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1685 int sock_common_setsockopt(struct socket *sock, int level, int optname,
1687 int compat_sock_common_getsockopt(struct socket *sock, int level,
1689 int compat_sock_common_setsockopt(struct socket *sock, int level,
1692 void sk_common_release(struct sock *sk);
1699 void sock_init_data(struct socket *sock, struct sock *sk);
1727 static inline void sock_put(struct sock *sk)  in sock_put()
1735 void sock_gen_put(struct sock *sk);
1737 int __sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested,
1739 static inline int sk_receive_skb(struct sock *sk, struct sk_buff *skb,  in sk_receive_skb()
1745 static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)  in sk_tx_queue_set()
1755 static inline void sk_tx_queue_clear(struct sock *sk)  in sk_tx_queue_clear()
1760 static inline int sk_tx_queue_get(const struct sock *sk)  in sk_tx_queue_get()
1768 static inline void sk_rx_queue_set(struct sock *sk, const struct sk_buff *skb)  in sk_rx_queue_set()
1782 static inline void sk_rx_queue_clear(struct sock *sk)  in sk_rx_queue_clear()
1790 static inline int sk_rx_queue_get(const struct sock *sk)  in sk_rx_queue_get()
1799 static inline void sk_set_socket(struct sock *sk, struct socket *sock)  in sk_set_socket()  argument
1802 	sk->sk_socket = sock;  in sk_set_socket()
1805 static inline wait_queue_head_t *sk_sleep(struct sock *sk)  in sk_sleep()
1817 static inline void sock_orphan(struct sock *sk)  in sock_orphan()
1826 static inline void sock_graft(struct sock *sk, struct socket *parent)  in sock_graft()
1838 kuid_t sock_i_uid(struct sock *sk);
1839 unsigned long sock_i_ino(struct sock *sk);
1841 static inline kuid_t sock_net_uid(const struct net *net, const struct sock *sk)  in sock_net_uid()
1853 static inline void sk_set_txhash(struct sock *sk)  in sk_set_txhash()
1858 static inline void sk_rethink_txhash(struct sock *sk)  in sk_rethink_txhash()
1865 __sk_dst_get(struct sock *sk)  in __sk_dst_get()
1872 sk_dst_get(struct sock *sk)  in sk_dst_get()
1884 static inline void dst_negative_advice(struct sock *sk)  in dst_negative_advice()
1902 __sk_dst_set(struct sock *sk, struct dst_entry *dst)  in __sk_dst_set()
1915 sk_dst_set(struct sock *sk, struct dst_entry *dst)  in sk_dst_set()
1926 __sk_dst_reset(struct sock *sk)  in __sk_dst_reset()
1932 sk_dst_reset(struct sock *sk)  in sk_dst_reset()
1937 struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
1939 struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
1941 static inline void sk_dst_confirm(struct sock *sk)  in sk_dst_confirm()
1950 		struct sock *sk = skb->sk;  in sock_confirm_neigh()
1961 bool sk_mc_loop(struct sock *sk);
1963 static inline bool sk_can_gso(const struct sock *sk)  in sk_can_gso()
1968 void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
1970 static inline void sk_nocaps_add(struct sock *sk, netdev_features_t flags)  in sk_nocaps_add()
1976 static inline int skb_do_copy_data_nocache(struct sock *sk, struct sk_buff *skb,  in skb_do_copy_data_nocache()
1994 static inline int skb_add_data_nocache(struct sock *sk, struct sk_buff *skb,  in skb_add_data_nocache()
2007 static inline int skb_copy_to_page_nocache(struct sock *sk, struct iov_iter *from,  in skb_copy_to_page_nocache()
2033 static inline int sk_wmem_alloc_get(const struct sock *sk)  in sk_wmem_alloc_get()
2044 static inline int sk_rmem_alloc_get(const struct sock *sk)  in sk_rmem_alloc_get()
2055 static inline bool sk_has_allocations(const struct sock *sk)  in sk_has_allocations()
2104 static inline void sock_poll_wait(struct file *filp, struct socket *sock,  in sock_poll_wait()  argument
2108 		poll_wait(filp, &sock->wq.wait, p);  in sock_poll_wait()
2118 static inline void skb_set_hash_from_sk(struct sk_buff *skb, struct sock *sk)  in skb_set_hash_from_sk()
2126 void skb_set_owner_w(struct sk_buff *skb, struct sock *sk);
2136 static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)  in skb_set_owner_r()
2145 void sk_reset_timer(struct sock *sk, struct timer_list *timer,
2148 void sk_stop_timer(struct sock *sk, struct timer_list *timer);
2150 int __sk_queue_drop_skb(struct sock *sk, struct sk_buff_head *sk_queue,
2152 			void (*destructor)(struct sock *sk,
2154 int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
2155 int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
2157 int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
2158 struct sk_buff *sock_dequeue_err_skb(struct sock *sk);
2164 static inline int sock_error(struct sock *sk)  in sock_error()
2173 static inline unsigned long sock_wspace(struct sock *sk)  in sock_wspace()
2189 static inline void sk_set_bit(int nr, struct sock *sk)  in sk_set_bit()
2198 static inline void sk_clear_bit(int nr, struct sock *sk)  in sk_clear_bit()
2207 static inline void sk_wake_async(const struct sock *sk, int how, int band)  in sk_wake_async()
2226 static inline void sk_stream_moderate_sndbuf(struct sock *sk)  in sk_stream_moderate_sndbuf()
2238 struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp,
2253 static inline struct page_frag *sk_page_frag(struct sock *sk)  in sk_page_frag()
2261 bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
2266 static inline bool sock_writeable(const struct sock *sk)  in sock_writeable()
2276 static inline long sock_rcvtimeo(const struct sock *sk, bool noblock)  in sock_rcvtimeo()
2281 static inline long sock_sndtimeo(const struct sock *sk, bool noblock)  in sock_sndtimeo()
2286 static inline int sock_rcvlowat(const struct sock *sk, int waitall, int len)  in sock_rcvlowat()
2319 sock_skb_set_dropcount(const struct sock *sk, struct sk_buff *skb)  in sock_skb_set_dropcount()
2325 static inline void sk_drops_add(struct sock *sk, const struct sk_buff *skb)  in sk_drops_add()
2332 static inline ktime_t sock_read_timestamp(struct sock *sk)  in sock_read_timestamp()
2349 static inline void sock_write_timestamp(struct sock *sk, ktime_t kt)  in sock_write_timestamp()
2360 void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
2362 void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
2366 sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)  in sock_recv_timestamp()
2390 void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
2394 static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,  in sock_recv_ts_and_drops()
2421 static inline void _sock_tx_timestamp(struct sock *sk, __u16 tsflags,  in _sock_tx_timestamp()
2434 static inline void sock_tx_timestamp(struct sock *sk, __u16 tsflags,  in sock_tx_timestamp()
2455 static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb)  in sk_eat_skb()
2468 struct net *sock_net(const struct sock *sk)  in sock_net()
2474 void sock_net_set(struct sock *sk, struct net *net)  in sock_net_set()
2479 static inline struct sock *skb_steal_sock(struct sk_buff *skb)  in skb_steal_sock()
2482 		struct sock *sk = skb->sk;  in skb_steal_sock()
2494 static inline bool sk_fullsock(const struct sock *sk)  in sk_fullsock()
2507 	struct sock *sk = skb->sk;  in sk_validate_xmit_skb()
2526 static inline bool sk_listener(const struct sock *sk)  in sk_listener()
2531 void sock_enable_timestamp(struct sock *sk, int flag);
2532 int sock_recv_errqueue(struct sock *sk, struct msghdr *msg, int len, int level,
2535 bool sk_ns_capable(const struct sock *sk,
2537 bool sk_capable(const struct sock *sk, int cap);
2538 bool sk_net_capable(const struct sock *sk, int cap);
2540 void sk_get_meminfo(const struct sock *sk, u32 *meminfo);
2563 static inline int sk_get_wmem0(const struct sock *sk, const struct proto *proto)  in sk_get_wmem0()
2572 static inline int sk_get_rmem0(const struct sock *sk, const struct proto *proto)  in sk_get_rmem0()
2585 static inline void sk_pacing_shift_update(struct sock *sk, int val)  in sk_pacing_shift_update()
2597 static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif)  in sk_dev_equal_l3scope()