Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 2157 deletions

diff --git a/ANDROID_3.4.5/include/net/sock.h b/ANDROID_3.4.5/include/net/sock.h
deleted file mode 100644
index 5a0a58ac..00000000
--- a/ANDROID_3.4.5/include/net/sock.h
+++ /dev/null
@@ -1,2157 +0,0 @@
-/*
- * INET		An implementation of the TCP/IP protocol suite for the LINUX
- *		operating system.  INET is implemented using the  BSD Socket
- *		interface as the means of communication with the user level.
- *
- *		Definitions for the AF_INET socket handler.
- *
- * Version:	@(#)sock.h	1.0.4	05/13/93
- *
- * Authors:	Ross Biro
- *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *		Corey Minyard <wf-rch!minyard@relay.EU.net>
- *		Florian La Roche <flla@stud.uni-sb.de>
- *
- * Fixes:
- *		Alan Cox	:	Volatiles in skbuff pointers. See
- *					skbuff comments. May be overdone,
- *					better to prove they can be removed
- *					than the reverse.
- *		Alan Cox	:	Added a zapped field for tcp to note
- *					a socket is reset and must stay shut up
- *		Alan Cox	:	New fields for options
- *	Pauline Middelink	:	identd support
- *		Alan Cox	:	Eliminate low level recv/recvfrom
- *		David S. Miller	:	New socket lookup architecture.
- *              Steve Whitehouse:       Default routines for sock_ops
- *              Arnaldo C. Melo :	removed net_pinfo, tp_pinfo and made
- *              			protinfo be just a void pointer, as the
- *              			protocol specific parts were moved to
- *              			respective headers and ipv4/v6, etc now
- *              			use private slabcaches for its socks
- *              Pedro Hortas	:	New flags field for socket options
- *
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
- */
-#ifndef _SOCK_H
-#define _SOCK_H
-
-#include <linux/hardirq.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/list_nulls.h>
-#include <linux/timer.h>
-#include <linux/cache.h>
-#include <linux/lockdep.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>	/* struct sk_buff */
-#include <linux/mm.h>
-#include <linux/security.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/memcontrol.h>
-#include <linux/res_counter.h>
-#include <linux/static_key.h>
-#include <linux/aio.h>
-#include <linux/sched.h>
-
-#include <linux/filter.h>
-#include <linux/rculist_nulls.h>
-#include <linux/poll.h>
-
-#include <linux/atomic.h>
-#include <net/dst.h>
-#include <net/checksum.h>
-
-struct cgroup;
-struct cgroup_subsys;
-#ifdef CONFIG_NET
-int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss);
-void mem_cgroup_sockets_destroy(struct cgroup *cgrp);
-#else
-static inline
-int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss)
-{
-	return 0;
-}
-static inline
-void mem_cgroup_sockets_destroy(struct cgroup *cgrp)
-{
-}
-#endif
-/*
- * This structure really needs to be cleaned up.
- * Most of it is for TCP, and not used by any of
- * the other protocols.
- */
-
-/* Define this to get the SOCK_DBG debugging facility. */
-#define SOCK_DEBUGGING
-#ifdef SOCK_DEBUGGING
-#define SOCK_DEBUG(sk, msg...) do { if ((sk) && sock_flag((sk), SOCK_DBG)) \
-					printk(KERN_DEBUG msg); } while (0)
-#else
-/* Validate arguments and do nothing */
-static inline __printf(2, 3)
-void SOCK_DEBUG(struct sock *sk, const char *msg, ...)
-{
-}
-#endif
-
-/* This is the per-socket lock.  The spinlock provides a synchronization
- * between user contexts and software interrupt processing, whereas the
- * mini-semaphore synchronizes multiple users amongst themselves.
- */
-typedef struct {
-	spinlock_t		slock;
-	int			owned;
-	wait_queue_head_t	wq;
-	/*
-	 * We express the mutex-alike socket_lock semantics
-	 * to the lock validator by explicitly managing
-	 * the slock as a lock variant (in addition to
-	 * the slock itself):
-	 */
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-	struct lockdep_map dep_map;
-#endif
-} socket_lock_t;
-
-struct sock;
-struct proto;
-struct net;
-
-/**
- *	struct sock_common - minimal network layer representation of sockets
- *	@skc_daddr: Foreign IPv4 addr
- *	@skc_rcv_saddr: Bound local IPv4 addr
- *	@skc_hash: hash value used with various protocol lookup tables
- *	@skc_u16hashes: two u16 hash values used by UDP lookup tables
- *	@skc_family: network address family
- *	@skc_state: Connection state
- *	@skc_reuse: %SO_REUSEADDR setting
- *	@skc_bound_dev_if: bound device index if != 0
- *	@skc_bind_node: bind hash linkage for various protocol lookup tables
- *	@skc_portaddr_node: second hash linkage for UDP/UDP-Lite protocol
- *	@skc_prot: protocol handlers inside a network family
- *	@skc_net: reference to the network namespace of this socket
- *	@skc_node: main hash linkage for various protocol lookup tables
- *	@skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
- *	@skc_tx_queue_mapping: tx queue number for this connection
- *	@skc_refcnt: reference count
- *
- *	This is the minimal network layer representation of sockets, the header
- *	for struct sock and struct inet_timewait_sock.
- */
-struct sock_common {
-	/* skc_daddr and skc_rcv_saddr must be grouped :
-	 * cf INET_MATCH() and INET_TW_MATCH()
-	 */
-	__be32			skc_daddr;
-	__be32			skc_rcv_saddr;
-
-	union  {
-		unsigned int	skc_hash;
-		__u16		skc_u16hashes[2];
-	};
-	unsigned short		skc_family;
-	volatile unsigned char	skc_state;
-	unsigned char		skc_reuse;
-	int			skc_bound_dev_if;
-	union {
-		struct hlist_node	skc_bind_node;
-		struct hlist_nulls_node skc_portaddr_node;
-	};
-	struct proto		*skc_prot;
-#ifdef CONFIG_NET_NS
-	struct net	 	*skc_net;
-#endif
-	/*
-	 * fields between dontcopy_begin/dontcopy_end
-	 * are not copied in sock_copy()
-	 */
-	/* private: */
-	int			skc_dontcopy_begin[0];
-	/* public: */
-	union {
-		struct hlist_node	skc_node;
-		struct hlist_nulls_node skc_nulls_node;
-	};
-	int			skc_tx_queue_mapping;
-	atomic_t		skc_refcnt;
-	/* private: */
-	int                     skc_dontcopy_end[0];
-	/* public: */
-};
-
-struct cg_proto;
-/**
-  *	struct sock - network layer representation of sockets
-  *	@__sk_common: shared layout with inet_timewait_sock
-  *	@sk_shutdown: mask of %SEND_SHUTDOWN and/or %RCV_SHUTDOWN
-  *	@sk_userlocks: %SO_SNDBUF and %SO_RCVBUF settings
-  *	@sk_lock:	synchronizer
-  *	@sk_rcvbuf: size of receive buffer in bytes
-  *	@sk_wq: sock wait queue and async head
-  *	@sk_dst_cache: destination cache
-  *	@sk_dst_lock: destination cache lock
-  *	@sk_policy: flow policy
-  *	@sk_receive_queue: incoming packets
-  *	@sk_wmem_alloc: transmit queue bytes committed
-  *	@sk_write_queue: Packet sending queue
-  *	@sk_async_wait_queue: DMA copied packets
-  *	@sk_omem_alloc: "o" is "option" or "other"
-  *	@sk_wmem_queued: persistent queue size
-  *	@sk_forward_alloc: space allocated forward
-  *	@sk_allocation: allocation mode
-  *	@sk_sndbuf: size of send buffer in bytes
-  *	@sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
-  *		   %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
-  *	@sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
-  *	@sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
-  *	@sk_route_nocaps: forbidden route capabilities (e.g NETIF_F_GSO_MASK)
-  *	@sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
-  *	@sk_gso_max_size: Maximum GSO segment size to build
-  *	@sk_lingertime: %SO_LINGER l_linger setting
-  *	@sk_backlog: always used with the per-socket spinlock held
-  *	@sk_callback_lock: used with the callbacks in the end of this struct
-  *	@sk_error_queue: rarely used
-  *	@sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt,
-  *			  IPV6_ADDRFORM for instance)
-  *	@sk_err: last error
-  *	@sk_err_soft: errors that don't cause failure but are the cause of a
-  *		      persistent failure not just 'timed out'
-  *	@sk_drops: raw/udp drops counter
-  *	@sk_ack_backlog: current listen backlog
-  *	@sk_max_ack_backlog: listen backlog set in listen()
-  *	@sk_priority: %SO_PRIORITY setting
-  *	@sk_cgrp_prioidx: socket group's priority map index
-  *	@sk_type: socket type (%SOCK_STREAM, etc)
-  *	@sk_protocol: which protocol this socket belongs in this network family
-  *	@sk_peer_pid: &struct pid for this socket's peer
-  *	@sk_peer_cred: %SO_PEERCRED setting
-  *	@sk_rcvlowat: %SO_RCVLOWAT setting
-  *	@sk_rcvtimeo: %SO_RCVTIMEO setting
-  *	@sk_sndtimeo: %SO_SNDTIMEO setting
-  *	@sk_rxhash: flow hash received from netif layer
-  *	@sk_filter: socket filtering instructions
-  *	@sk_protinfo: private area, net family specific, when not using slab
-  *	@sk_timer: sock cleanup timer
-  *	@sk_stamp: time stamp of last packet received
-  *	@sk_socket: Identd and reporting IO signals
-  *	@sk_user_data: RPC layer private data
-  *	@sk_sndmsg_page: cached page for sendmsg
-  *	@sk_sndmsg_off: cached offset for sendmsg
-  *	@sk_peek_off: current peek_offset value
-  *	@sk_send_head: front of stuff to transmit
-  *	@sk_security: used by security modules
-  *	@sk_mark: generic packet mark
-  *	@sk_classid: this socket's cgroup classid
-  *	@sk_cgrp: this socket's cgroup-specific proto data
-  *	@sk_write_pending: a write to stream socket waits to start
-  *	@sk_state_change: callback to indicate change in the state of the sock
-  *	@sk_data_ready: callback to indicate there is data to be processed
-  *	@sk_write_space: callback to indicate there is bf sending space available
-  *	@sk_error_report: callback to indicate errors (e.g. %MSG_ERRQUEUE)
-  *	@sk_backlog_rcv: callback to process the backlog
-  *	@sk_destruct: called at sock freeing time, i.e. when all refcnt == 0
- */
-struct sock {
-	/*
-	 * Now struct inet_timewait_sock also uses sock_common, so please just
-	 * don't add nothing before this first member (__sk_common) --acme
-	 */
-	struct sock_common	__sk_common;
-#define sk_node			__sk_common.skc_node
-#define sk_nulls_node		__sk_common.skc_nulls_node
-#define sk_refcnt		__sk_common.skc_refcnt
-#define sk_tx_queue_mapping	__sk_common.skc_tx_queue_mapping
-
-#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_family		__sk_common.skc_family
-#define sk_state		__sk_common.skc_state
-#define sk_reuse		__sk_common.skc_reuse
-#define sk_bound_dev_if		__sk_common.skc_bound_dev_if
-#define sk_bind_node		__sk_common.skc_bind_node
-#define sk_prot			__sk_common.skc_prot
-#define sk_net			__sk_common.skc_net
-	socket_lock_t		sk_lock;
-	struct sk_buff_head	sk_receive_queue;
-	/*
-	 * The backlog queue is special, it is always used with
-	 * the per-socket spinlock held and requires low latency
-	 * access. Therefore we special case it's implementation.
-	 * Note : rmem_alloc is in this structure to fill a hole
-	 * on 64bit arches, not because its logically part of
-	 * backlog.
-	 */
-	struct {
-		atomic_t	rmem_alloc;
-		int		len;
-		struct sk_buff	*head;
-		struct sk_buff	*tail;
-	} sk_backlog;
-#define sk_rmem_alloc sk_backlog.rmem_alloc
-	int			sk_forward_alloc;
-#ifdef CONFIG_RPS
-	__u32			sk_rxhash;
-#endif
-	atomic_t		sk_drops;
-	int			sk_rcvbuf;
-
-	struct sk_filter __rcu	*sk_filter;
-	struct socket_wq __rcu	*sk_wq;
-
-#ifdef CONFIG_NET_DMA
-	struct sk_buff_head	sk_async_wait_queue;
-#endif
-
-#ifdef CONFIG_XFRM
-	struct xfrm_policy	*sk_policy[2];
-#endif
-	unsigned long 		sk_flags;
-	struct dst_entry	*sk_dst_cache;
-	spinlock_t		sk_dst_lock;
-	atomic_t		sk_wmem_alloc;
-	atomic_t		sk_omem_alloc;
-	int			sk_sndbuf;
-	struct sk_buff_head	sk_write_queue;
-	kmemcheck_bitfield_begin(flags);
-	unsigned int		sk_shutdown  : 2,
-				sk_no_check  : 2,
-				sk_userlocks : 4,
-				sk_protocol  : 8,
-				sk_type      : 16;
-	kmemcheck_bitfield_end(flags);
-	int			sk_wmem_queued;
-	gfp_t			sk_allocation;
-	netdev_features_t	sk_route_caps;
-	netdev_features_t	sk_route_nocaps;
-	int			sk_gso_type;
-	unsigned int		sk_gso_max_size;
-	int			sk_rcvlowat;
-	unsigned long	        sk_lingertime;
-	struct sk_buff_head	sk_error_queue;
-	struct proto		*sk_prot_creator;
-	rwlock_t		sk_callback_lock;
-	int			sk_err,
-				sk_err_soft;
-	unsigned short		sk_ack_backlog;
-	unsigned short		sk_max_ack_backlog;
-	__u32			sk_priority;
-#ifdef CONFIG_CGROUPS
-	__u32			sk_cgrp_prioidx;
-#endif
-	struct pid		*sk_peer_pid;
-	const struct cred	*sk_peer_cred;
-	long			sk_rcvtimeo;
-	long			sk_sndtimeo;
-	void			*sk_protinfo;
-	struct timer_list	sk_timer;
-	ktime_t			sk_stamp;
-	struct socket		*sk_socket;
-	void			*sk_user_data;
-	struct page		*sk_sndmsg_page;
-	struct sk_buff		*sk_send_head;
-	__u32			sk_sndmsg_off;
-	__s32			sk_peek_off;
-	int			sk_write_pending;
-#ifdef CONFIG_SECURITY
-	void			*sk_security;
-#endif
-	__u32			sk_mark;
-	u32			sk_classid;
-	struct cg_proto		*sk_cgrp;
-	void			(*sk_state_change)(struct sock *sk);
-	void			(*sk_data_ready)(struct sock *sk, int bytes);
-	void			(*sk_write_space)(struct sock *sk);
-	void			(*sk_error_report)(struct sock *sk);
-  	int			(*sk_backlog_rcv)(struct sock *sk,
-						  struct sk_buff *skb);  
-	void                    (*sk_destruct)(struct sock *sk);
-};
-
-static inline int sk_peek_offset(struct sock *sk, int flags)
-{
-	if ((flags & MSG_PEEK) && (sk->sk_peek_off >= 0))
-		return sk->sk_peek_off;
-	else
-		return 0;
-}
-
-static inline void sk_peek_offset_bwd(struct sock *sk, int val)
-{
-	if (sk->sk_peek_off >= 0) {
-		if (sk->sk_peek_off >= val)
-			sk->sk_peek_off -= val;
-		else
-			sk->sk_peek_off = 0;
-	}
-}
-
-static inline void sk_peek_offset_fwd(struct sock *sk, int val)
-{
-	if (sk->sk_peek_off >= 0)
-		sk->sk_peek_off += val;
-}
-
-/*
- * Hashed lists helper routines
- */
-static inline struct sock *sk_entry(const struct hlist_node *node)
-{
-	return hlist_entry(node, struct sock, sk_node);
-}
-
-static inline struct sock *__sk_head(const struct hlist_head *head)
-{
-	return hlist_entry(head->first, struct sock, sk_node);
-}
-
-static inline struct sock *sk_head(const struct hlist_head *head)
-{
-	return hlist_empty(head) ? NULL : __sk_head(head);
-}
-
-static inline struct sock *__sk_nulls_head(const struct hlist_nulls_head *head)
-{
-	return hlist_nulls_entry(head->first, struct sock, sk_nulls_node);
-}
-
-static inline struct sock *sk_nulls_head(const struct hlist_nulls_head *head)
-{
-	return hlist_nulls_empty(head) ? NULL : __sk_nulls_head(head);
-}
-
-static inline struct sock *sk_next(const struct sock *sk)
-{
-	return sk->sk_node.next ?
-		hlist_entry(sk->sk_node.next, struct sock, sk_node) : NULL;
-}
-
-static inline struct sock *sk_nulls_next(const struct sock *sk)
-{
-	return (!is_a_nulls(sk->sk_nulls_node.next)) ?
-		hlist_nulls_entry(sk->sk_nulls_node.next,
-				  struct sock, sk_nulls_node) :
-		NULL;
-}
-
-static inline int sk_unhashed(const struct sock *sk)
-{
-	return hlist_unhashed(&sk->sk_node);
-}
-
-static inline int sk_hashed(const struct sock *sk)
-{
-	return !sk_unhashed(sk);
-}
-
-static __inline__ void sk_node_init(struct hlist_node *node)
-{
-	node->pprev = NULL;
-}
-
-static __inline__ void sk_nulls_node_init(struct hlist_nulls_node *node)
-{
-	node->pprev = NULL;
-}
-
-static __inline__ void __sk_del_node(struct sock *sk)
-{
-	__hlist_del(&sk->sk_node);
-}
-
-/* NB: equivalent to hlist_del_init_rcu */
-static __inline__ int __sk_del_node_init(struct sock *sk)
-{
-	if (sk_hashed(sk)) {
-		__sk_del_node(sk);
-		sk_node_init(&sk->sk_node);
-		return 1;
-	}
-	return 0;
-}
-
-/* Grab socket reference count. This operation is valid only
-   when sk is ALREADY grabbed f.e. it is found in hash table
-   or a list and the lookup is made under lock preventing hash table
-   modifications.
- */
-
-static inline void sock_hold(struct sock *sk)
-{
-	atomic_inc(&sk->sk_refcnt);
-}
-
-/* Ungrab socket in the context, which assumes that socket refcnt
-   cannot hit zero, f.e. it is true in context of any socketcall.
- */
-static inline void __sock_put(struct sock *sk)
-{
-	atomic_dec(&sk->sk_refcnt);
-}
-
-static __inline__ int sk_del_node_init(struct sock *sk)
-{
-	int rc = __sk_del_node_init(sk);
-
-	if (rc) {
-		/* paranoid for a while -acme */
-		WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
-		__sock_put(sk);
-	}
-	return rc;
-}
-#define sk_del_node_init_rcu(sk)	sk_del_node_init(sk)
-
-static __inline__ int __sk_nulls_del_node_init_rcu(struct sock *sk)
-{
-	if (sk_hashed(sk)) {
-		hlist_nulls_del_init_rcu(&sk->sk_nulls_node);
-		return 1;
-	}
-	return 0;
-}
-
-static __inline__ int sk_nulls_del_node_init_rcu(struct sock *sk)
-{
-	int rc = __sk_nulls_del_node_init_rcu(sk);
-
-	if (rc) {
-		/* paranoid for a while -acme */
-		WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
-		__sock_put(sk);
-	}
-	return rc;
-}
-
-static __inline__ void __sk_add_node(struct sock *sk, struct hlist_head *list)
-{
-	hlist_add_head(&sk->sk_node, list);
-}
-
-static __inline__ void sk_add_node(struct sock *sk, struct hlist_head *list)
-{
-	sock_hold(sk);
-	__sk_add_node(sk, list);
-}
-
-static __inline__ void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
-{
-	sock_hold(sk);
-	hlist_add_head_rcu(&sk->sk_node, list);
-}
-
-static __inline__ void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
-{
-	hlist_nulls_add_head_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);
-	__sk_nulls_add_node_rcu(sk, list);
-}
-
-static __inline__ void __sk_del_bind_node(struct sock *sk)
-{
-	__hlist_del(&sk->sk_bind_node);
-}
-
-static __inline__ void sk_add_bind_node(struct sock *sk,
-					struct hlist_head *list)
-{
-	hlist_add_head(&sk->sk_bind_node, list);
-}
-
-#define sk_for_each(__sk, node, list) \
-	hlist_for_each_entry(__sk, node, list, sk_node)
-#define sk_for_each_rcu(__sk, node, list) \
-	hlist_for_each_entry_rcu(__sk, node, list, sk_node)
-#define sk_nulls_for_each(__sk, node, list) \
-	hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
-#define sk_nulls_for_each_rcu(__sk, node, list) \
-	hlist_nulls_for_each_entry_rcu(__sk, node, list, sk_nulls_node)
-#define sk_for_each_from(__sk, node) \
-	if (__sk && ({ node = &(__sk)->sk_node; 1; })) \
-		hlist_for_each_entry_from(__sk, node, sk_node)
-#define sk_nulls_for_each_from(__sk, node) \
-	if (__sk && ({ node = &(__sk)->sk_nulls_node; 1; })) \
-		hlist_nulls_for_each_entry_from(__sk, node, sk_nulls_node)
-#define sk_for_each_safe(__sk, node, tmp, list) \
-	hlist_for_each_entry_safe(__sk, node, tmp, list, sk_node)
-#define sk_for_each_bound(__sk, node, list) \
-	hlist_for_each_entry(__sk, node, list, sk_bind_node)
-
-/* Sock flags */
-enum sock_flags {
-	SOCK_DEAD,
-	SOCK_DONE,
-	SOCK_URGINLINE,
-	SOCK_KEEPOPEN,
-	SOCK_LINGER,
-	SOCK_DESTROY,
-	SOCK_BROADCAST,
-	SOCK_TIMESTAMP,
-	SOCK_ZAPPED,
-	SOCK_USE_WRITE_QUEUE, /* whether to call sk->sk_write_space in sock_wfree */
-	SOCK_DBG, /* %SO_DEBUG setting */
-	SOCK_RCVTSTAMP, /* %SO_TIMESTAMP setting */
-	SOCK_RCVTSTAMPNS, /* %SO_TIMESTAMPNS setting */
-	SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
-	SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
-	SOCK_TIMESTAMPING_TX_HARDWARE,  /* %SOF_TIMESTAMPING_TX_HARDWARE */
-	SOCK_TIMESTAMPING_TX_SOFTWARE,  /* %SOF_TIMESTAMPING_TX_SOFTWARE */
-	SOCK_TIMESTAMPING_RX_HARDWARE,  /* %SOF_TIMESTAMPING_RX_HARDWARE */
-	SOCK_TIMESTAMPING_RX_SOFTWARE,  /* %SOF_TIMESTAMPING_RX_SOFTWARE */
-	SOCK_TIMESTAMPING_SOFTWARE,     /* %SOF_TIMESTAMPING_SOFTWARE */
-	SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */
-	SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */
-	SOCK_FASYNC, /* fasync() active */
-	SOCK_RXQ_OVFL,
-	SOCK_ZEROCOPY, /* buffers from userspace */
-	SOCK_WIFI_STATUS, /* push wifi status to userspace */
-	SOCK_NOFCS, /* Tell NIC not to do the Ethernet FCS.
-		     * Will use last 4 bytes of packet sent from
-		     * user-space instead.
-		     */
-};
-
-static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
-{
-	nsk->sk_flags = osk->sk_flags;
-}
-
-static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)
-{
-	__set_bit(flag, &sk->sk_flags);
-}
-
-static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)
-{
-	__clear_bit(flag, &sk->sk_flags);
-}
-
-static inline int sock_flag(struct sock *sk, enum sock_flags flag)
-{
-	return test_bit(flag, &sk->sk_flags);
-}
-
-static inline void sk_acceptq_removed(struct sock *sk)
-{
-	sk->sk_ack_backlog--;
-}
-
-static inline void sk_acceptq_added(struct sock *sk)
-{
-	sk->sk_ack_backlog++;
-}
-
-static inline int sk_acceptq_is_full(struct sock *sk)
-{
-	return sk->sk_ack_backlog > sk->sk_max_ack_backlog;
-}
-
-/*
- * Compute minimal free write space needed to queue new packets.
- */
-static inline int sk_stream_min_wspace(struct sock *sk)
-{
-	return sk->sk_wmem_queued >> 1;
-}
-
-static inline int sk_stream_wspace(struct sock *sk)
-{
-	return sk->sk_sndbuf - sk->sk_wmem_queued;
-}
-
-extern void sk_stream_write_space(struct sock *sk);
-
-static inline int sk_stream_memory_free(struct sock *sk)
-{
-	return sk->sk_wmem_queued < sk->sk_sndbuf;
-}
-
-/* OOB backlog add */
-static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
-{
-	/* dont let skb dst not refcounted, we are going to leave rcu lock */
-	skb_dst_force(skb);
-
-	if (!sk->sk_backlog.tail)
-		sk->sk_backlog.head = skb;
-	else
-		sk->sk_backlog.tail->next = skb;
-
-	sk->sk_backlog.tail = skb;
-	skb->next = NULL;
-}
-
-/*
- * Take into account size of receive queue and backlog queue
- * Do not take into account this skb truesize,
- * to allow even a single big packet to come.
- */
-static inline bool sk_rcvqueues_full(const struct sock *sk, const struct sk_buff *skb)
-{
-	unsigned int qsize = sk->sk_backlog.len + atomic_read(&sk->sk_rmem_alloc);
-
-	return qsize > sk->sk_rcvbuf;
-}
-
-/* The per-socket spinlock must be held here. */
-static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb)
-{
-	if (sk_rcvqueues_full(sk, skb))
-		return -ENOBUFS;
-
-	__sk_add_backlog(sk, skb);
-	sk->sk_backlog.len += skb->truesize;
-	return 0;
-}
-
-static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
-{
-	return sk->sk_backlog_rcv(sk, skb);
-}
-
-static inline void sock_rps_record_flow(const struct sock *sk)
-{
-#ifdef CONFIG_RPS
-	struct rps_sock_flow_table *sock_flow_table;
-
-	rcu_read_lock();
-	sock_flow_table = rcu_dereference(rps_sock_flow_table);
-	rps_record_sock_flow(sock_flow_table, sk->sk_rxhash);
-	rcu_read_unlock();
-#endif
-}
-
-static inline void sock_rps_reset_flow(const struct sock *sk)
-{
-#ifdef CONFIG_RPS
-	struct rps_sock_flow_table *sock_flow_table;
-
-	rcu_read_lock();
-	sock_flow_table = rcu_dereference(rps_sock_flow_table);
-	rps_reset_sock_flow(sock_flow_table, sk->sk_rxhash);
-	rcu_read_unlock();
-#endif
-}
-
-static inline void sock_rps_save_rxhash(struct sock *sk,
-					const struct sk_buff *skb)
-{
-#ifdef CONFIG_RPS
-	if (unlikely(sk->sk_rxhash != skb->rxhash)) {
-		sock_rps_reset_flow(sk);
-		sk->sk_rxhash = skb->rxhash;
-	}
-#endif
-}
-
-static inline void sock_rps_reset_rxhash(struct sock *sk)
-{
-#ifdef CONFIG_RPS
-	sock_rps_reset_flow(sk);
-	sk->sk_rxhash = 0;
-#endif
-}
-
-#define sk_wait_event(__sk, __timeo, __condition)			\
-	({	int __rc;						\
-		release_sock(__sk);					\
-		__rc = __condition;					\
-		if (!__rc) {						\
-			*(__timeo) = schedule_timeout(*(__timeo));	\
-		}							\
-		lock_sock(__sk);					\
-		__rc = __condition;					\
-		__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 int sk_wait_data(struct sock *sk, long *timeo);
-
-struct request_sock_ops;
-struct timewait_sock_ops;
-struct inet_hashinfo;
-struct raw_hashinfo;
-struct module;
-
-/* Networking protocol blocks we attach to sockets.
- * socket layer -> transport layer interface
- * transport -> network interface is defined by struct inet_proto
- */
-struct proto {
-	void			(*close)(struct sock *sk, 
-					long timeout);
-	int			(*connect)(struct sock *sk,
-				        struct sockaddr *uaddr, 
-					int addr_len);
-	int			(*disconnect)(struct sock *sk, int flags);
-
-	struct sock *		(*accept) (struct sock *sk, int flags, int *err);
-
-	int			(*ioctl)(struct sock *sk, int cmd,
-					 unsigned long arg);
-	int			(*init)(struct sock *sk);
-	void			(*destroy)(struct sock *sk);
-	void			(*shutdown)(struct sock *sk, int how);
-	int			(*setsockopt)(struct sock *sk, int level, 
-					int optname, char __user *optval,
-					unsigned int optlen);
-	int			(*getsockopt)(struct sock *sk, int level, 
-					int optname, char __user *optval, 
-					int __user *option);  	 
-#ifdef CONFIG_COMPAT
-	int			(*compat_setsockopt)(struct sock *sk,
-					int level,
-					int optname, char __user *optval,
-					unsigned int optlen);
-	int			(*compat_getsockopt)(struct sock *sk,
-					int level,
-					int optname, char __user *optval,
-					int __user *option);
-	int			(*compat_ioctl)(struct sock *sk,
-					unsigned int cmd, unsigned long arg);
-#endif
-	int			(*sendmsg)(struct kiocb *iocb, struct sock *sk,
-					   struct msghdr *msg, size_t len);
-	int			(*recvmsg)(struct kiocb *iocb, struct sock *sk,
-					   struct msghdr *msg,
-					size_t len, int noblock, int flags, 
-					int *addr_len);
-	int			(*sendpage)(struct sock *sk, struct page *page,
-					int offset, size_t size, int flags);
-	int			(*bind)(struct sock *sk, 
-					struct sockaddr *uaddr, int addr_len);
-
-	int			(*backlog_rcv) (struct sock *sk, 
-						struct sk_buff *skb);
-
-	/* Keeping track of sk's, looking them up, and port selection methods. */
-	void			(*hash)(struct sock *sk);
-	void			(*unhash)(struct sock *sk);
-	void			(*rehash)(struct sock *sk);
-	int			(*get_port)(struct sock *sk, unsigned short snum);
-	void			(*clear_sk)(struct sock *sk, int size);
-
-	/* Keeping track of sockets in use */
-#ifdef CONFIG_PROC_FS
-	unsigned int		inuse_idx;
-#endif
-
-	/* Memory pressure */
-	void			(*enter_memory_pressure)(struct sock *sk);
-	atomic_long_t		*memory_allocated;	/* Current allocated memory. */
-	struct percpu_counter	*sockets_allocated;	/* Current number of sockets. */
-	/*
-	 * Pressure flag: try to collapse.
-	 * Technical note: it is used by multiple contexts non atomically.
-	 * All the __sk_mem_schedule() is of this nature: accounting
-	 * is strict, actions are advisory and have some latency.
-	 */
-	int			*memory_pressure;
-	long			*sysctl_mem;
-	int			*sysctl_wmem;
-	int			*sysctl_rmem;
-	int			max_header;
-	bool			no_autobind;
-
-	struct kmem_cache	*slab;
-	unsigned int		obj_size;
-	int			slab_flags;
-
-	struct percpu_counter	*orphan_count;
-
-	struct request_sock_ops	*rsk_prot;
-	struct timewait_sock_ops *twsk_prot;
-
-	union {
-		struct inet_hashinfo	*hashinfo;
-		struct udp_table	*udp_table;
-		struct raw_hashinfo	*raw_hash;
-	} h;
-
-	struct module		*owner;
-
-	char			name[32];
-
-	struct list_head	node;
-#ifdef SOCK_REFCNT_DEBUG
-	atomic_t		socks;
-#endif
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
-	/*
-	 * cgroup specific init/deinit functions. Called once for all
-	 * protocols that implement it, from cgroups populate function.
-	 * This function has to setup any files the protocol want to
-	 * appear in the kmem cgroup filesystem.
-	 */
-	int			(*init_cgroup)(struct cgroup *cgrp,
-					       struct cgroup_subsys *ss);
-	void			(*destroy_cgroup)(struct cgroup *cgrp);
-	struct cg_proto		*(*proto_cgroup)(struct mem_cgroup *memcg);
-#endif
-};
-
-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;
-	/*
-	 * memcg field is used to find which memcg we belong directly
-	 * Each memcg struct can hold more than one cg_proto, so container_of
-	 * won't really cut.
-	 *
-	 * The elegant solution would be having an inverse function to
-	 * proto_cgroup in struct proto, but that means polluting the structure
-	 * for everybody, instead of just for memcg users.
-	 */
-	struct mem_cgroup	*memcg;
-};
-
-extern int proto_register(struct proto *prot, int alloc_slab);
-extern void proto_unregister(struct proto *prot);
-
-#ifdef SOCK_REFCNT_DEBUG
-static inline void sk_refcnt_debug_inc(struct sock *sk)
-{
-	atomic_inc(&sk->sk_prot->socks);
-}
-
-static inline void sk_refcnt_debug_dec(struct sock *sk)
-{
-	atomic_dec(&sk->sk_prot->socks);
-	printk(KERN_DEBUG "%s socket %p released, %d are still alive\n",
-	       sk->sk_prot->name, sk, atomic_read(&sk->sk_prot->socks));
-}
-
-inline void sk_refcnt_debug_release(const struct sock *sk)
-{
-	if (atomic_read(&sk->sk_refcnt) != 1)
-		printk(KERN_DEBUG "Destruction of the %s socket %p delayed, refcnt=%d\n",
-		       sk->sk_prot->name, sk, atomic_read(&sk->sk_refcnt));
-}
-#else /* SOCK_REFCNT_DEBUG */
-#define sk_refcnt_debug_inc(sk) do { } while (0)
-#define sk_refcnt_debug_dec(sk) do { } while (0)
-#define sk_refcnt_debug_release(sk) do { } while (0)
-#endif /* SOCK_REFCNT_DEBUG */
-
-#if defined(CONFIG_CGROUP_MEM_RES_CTLR_KMEM) && defined(CONFIG_NET)
-extern struct static_key memcg_socket_limit_enabled;
-static inline struct cg_proto *parent_cg_proto(struct proto *proto,
-					       struct cg_proto *cg_proto)
-{
-	return proto->proto_cgroup(parent_mem_cgroup(cg_proto->memcg));
-}
-#define mem_cgroup_sockets_enabled static_key_false(&memcg_socket_limit_enabled)
-#else
-#define mem_cgroup_sockets_enabled 0
-static inline struct cg_proto *parent_cg_proto(struct proto *proto,
-					       struct cg_proto *cg_proto)
-{
-	return NULL;
-}
-#endif
-
-
-static inline bool sk_has_memory_pressure(const struct sock *sk)
-{
-	return sk->sk_prot->memory_pressure != NULL;
-}
-
-static inline bool sk_under_memory_pressure(const struct sock *sk)
-{
-	if (!sk->sk_prot->memory_pressure)
-		return false;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		return !!*sk->sk_cgrp->memory_pressure;
-
-	return !!*sk->sk_prot->memory_pressure;
-}
-
-static inline void sk_leave_memory_pressure(struct sock *sk)
-{
-	int *memory_pressure = sk->sk_prot->memory_pressure;
-
-	if (!memory_pressure)
-		return;
-
-	if (*memory_pressure)
-		*memory_pressure = 0;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
-		struct cg_proto *cg_proto = sk->sk_cgrp;
-		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;
-	}
-
-}
-
-static inline void sk_enter_memory_pressure(struct sock *sk)
-{
-	if (!sk->sk_prot->enter_memory_pressure)
-		return;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
-		struct cg_proto *cg_proto = sk->sk_cgrp;
-		struct proto *prot = sk->sk_prot;
-
-		for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
-			cg_proto->enter_memory_pressure(sk);
-	}
-
-	sk->sk_prot->enter_memory_pressure(sk);
-}
-
-static inline long sk_prot_mem_limits(const struct sock *sk, int index)
-{
-	long *prot = sk->sk_prot->sysctl_mem;
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		prot = sk->sk_cgrp->sysctl_mem;
-	return prot[index];
-}
-
-static inline void memcg_memory_allocated_add(struct cg_proto *prot,
-					      unsigned long amt,
-					      int *parent_status)
-{
-	struct res_counter *fail;
-	int ret;
-
-	ret = res_counter_charge_nofail(prot->memory_allocated,
-					amt << PAGE_SHIFT, &fail);
-	if (ret < 0)
-		*parent_status = OVER_LIMIT;
-}
-
-static inline void memcg_memory_allocated_sub(struct cg_proto *prot,
-					      unsigned long amt)
-{
-	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);
-	return ret >> PAGE_SHIFT;
-}
-
-static inline long
-sk_memory_allocated(const struct sock *sk)
-{
-	struct proto *prot = sk->sk_prot;
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		return memcg_memory_allocated_read(sk->sk_cgrp);
-
-	return atomic_long_read(prot->memory_allocated);
-}
-
-static inline long
-sk_memory_allocated_add(struct sock *sk, int amt, int *parent_status)
-{
-	struct proto *prot = sk->sk_prot;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
-		memcg_memory_allocated_add(sk->sk_cgrp, amt, parent_status);
-		/* update the root cgroup regardless */
-		atomic_long_add_return(amt, prot->memory_allocated);
-		return memcg_memory_allocated_read(sk->sk_cgrp);
-	}
-
-	return atomic_long_add_return(amt, prot->memory_allocated);
-}
-
-static inline void
-sk_memory_allocated_sub(struct sock *sk, int amt)
-{
-	struct proto *prot = sk->sk_prot;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		memcg_memory_allocated_sub(sk->sk_cgrp, amt);
-
-	atomic_long_sub(amt, prot->memory_allocated);
-}
-
-static inline void sk_sockets_allocated_dec(struct sock *sk)
-{
-	struct proto *prot = sk->sk_prot;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
-		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(prot->sockets_allocated);
-}
-
-static inline void sk_sockets_allocated_inc(struct sock *sk)
-{
-	struct proto *prot = sk->sk_prot;
-
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp) {
-		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(prot->sockets_allocated);
-}
-
-static inline int
-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(prot->sockets_allocated);
-}
-
-static inline int
-proto_sockets_allocated_sum_positive(struct proto *prot)
-{
-	return percpu_counter_sum_positive(prot->sockets_allocated);
-}
-
-static inline long
-proto_memory_allocated(struct proto *prot)
-{
-	return atomic_long_read(prot->memory_allocated);
-}
-
-static inline bool
-proto_memory_pressure(struct proto *prot)
-{
-	if (!prot->memory_pressure)
-		return false;
-	return !!*prot->memory_pressure;
-}
-
-
-#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);
-#else
-static void inline sock_prot_inuse_add(struct net *net, struct proto *prot,
-		int inc)
-{
-}
-#endif
-
-
-/* With per-bucket locks this operation is not-atomic, so that
- * this version is not worse.
- */
-static inline void __sk_prot_rehash(struct sock *sk)
-{
-	sk->sk_prot->unhash(sk);
-	sk->sk_prot->hash(sk);
-}
-
-void sk_prot_clear_portaddr_nulls(struct sock *sk, int size);
-
-/* About 10 seconds */
-#define SOCK_DESTROY_TIME (10*HZ)
-
-/* Sockets 0-1023 can't be bound to unless you are superuser */
-#define PROT_SOCK	1024
-
-#define SHUTDOWN_MASK	3
-#define RCV_SHUTDOWN	1
-#define SEND_SHUTDOWN	2
-
-#define SOCK_SNDBUF_LOCK	1
-#define SOCK_RCVBUF_LOCK	2
-#define SOCK_BINDADDR_LOCK	4
-#define SOCK_BINDPORT_LOCK	8
-
-/* sock_iocb: used to kick off async processing of socket ios */
-struct sock_iocb {
-	struct list_head	list;
-
-	int			flags;
-	int			size;
-	struct socket		*sock;
-	struct sock		*sk;
-	struct scm_cookie	*scm;
-	struct msghdr		*msg, async_msg;
-	struct kiocb		*kiocb;
-};
-
-static inline struct sock_iocb *kiocb_to_siocb(struct kiocb *iocb)
-{
-	return (struct sock_iocb *)iocb->private;
-}
-
-static inline struct kiocb *siocb_to_kiocb(struct sock_iocb *si)
-{
-	return si->kiocb;
-}
-
-struct socket_alloc {
-	struct socket socket;
-	struct inode vfs_inode;
-};
-
-static inline struct socket *SOCKET_I(struct inode *inode)
-{
-	return &container_of(inode, struct socket_alloc, vfs_inode)->socket;
-}
-
-static inline struct inode *SOCK_INODE(struct socket *socket)
-{
-	return &container_of(socket, struct socket_alloc, socket)->vfs_inode;
-}
-
-/*
- * Functions for memory accounting
- */
-extern int __sk_mem_schedule(struct sock *sk, int size, int kind);
-extern void __sk_mem_reclaim(struct sock *sk);
-
-#define SK_MEM_QUANTUM ((int)PAGE_SIZE)
-#define SK_MEM_QUANTUM_SHIFT ilog2(SK_MEM_QUANTUM)
-#define SK_MEM_SEND	0
-#define SK_MEM_RECV	1
-
-static inline int sk_mem_pages(int amt)
-{
-	return (amt + SK_MEM_QUANTUM - 1) >> SK_MEM_QUANTUM_SHIFT;
-}
-
-static inline int sk_has_account(struct sock *sk)
-{
-	/* return true if protocol supports memory accounting */
-	return !!sk->sk_prot->memory_allocated;
-}
-
-static inline int sk_wmem_schedule(struct sock *sk, int size)
-{
-	if (!sk_has_account(sk))
-		return 1;
-	return size <= sk->sk_forward_alloc ||
-		__sk_mem_schedule(sk, size, SK_MEM_SEND);
-}
-
-static inline int sk_rmem_schedule(struct sock *sk, int size)
-{
-	if (!sk_has_account(sk))
-		return 1;
-	return size <= sk->sk_forward_alloc ||
-		__sk_mem_schedule(sk, size, SK_MEM_RECV);
-}
-
-static inline void sk_mem_reclaim(struct sock *sk)
-{
-	if (!sk_has_account(sk))
-		return;
-	if (sk->sk_forward_alloc >= SK_MEM_QUANTUM)
-		__sk_mem_reclaim(sk);
-}
-
-static inline void sk_mem_reclaim_partial(struct sock *sk)
-{
-	if (!sk_has_account(sk))
-		return;
-	if (sk->sk_forward_alloc > SK_MEM_QUANTUM)
-		__sk_mem_reclaim(sk);
-}
-
-static inline void sk_mem_charge(struct sock *sk, int size)
-{
-	if (!sk_has_account(sk))
-		return;
-	sk->sk_forward_alloc -= size;
-}
-
-static inline void sk_mem_uncharge(struct sock *sk, int size)
-{
-	if (!sk_has_account(sk))
-		return;
-	sk->sk_forward_alloc += size;
-}
-
-static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
-{
-	sock_set_flag(sk, SOCK_QUEUE_SHRUNK);
-	sk->sk_wmem_queued -= skb->truesize;
-	sk_mem_uncharge(sk, skb->truesize);
-	__kfree_skb(skb);
-}
-
-/* Used by processes to "lock" a socket state, so that
- * interrupts and bottom half handlers won't change it
- * from under us. It essentially blocks any incoming
- * packets, so that we won't get any new data or any
- * packets that change the state of the socket.
- *
- * While locked, BH processing will add new packets to
- * the backlog queue.  This queue is processed by the
- * owner of the socket lock right before it is released.
- *
- * Since ~2.3.5 it is also exclusive sleep lock serializing
- * accesses from user process context.
- */
-#define sock_owned_by_user(sk)	((sk)->sk_lock.owned)
-
-/*
- * Macro so as to not evaluate some arguments when
- * lockdep is not enabled.
- *
- * Mark both the sk_lock and the sk_lock.slock as a
- * per-address-family lock class.
- */
-#define sock_lock_init_class_and_name(sk, sname, skey, name, key) 	\
-do {									\
-	sk->sk_lock.owned = 0;						\
-	init_waitqueue_head(&sk->sk_lock.wq);				\
-	spin_lock_init(&(sk)->sk_lock.slock);				\
-	debug_check_no_locks_freed((void *)&(sk)->sk_lock,		\
-			sizeof((sk)->sk_lock));				\
-	lockdep_set_class_and_name(&(sk)->sk_lock.slock,		\
-		       	(skey), (sname));				\
-	lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0);	\
-} while (0)
-
-extern 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);
-
-/* BH context may only use the following locking interface. */
-#define bh_lock_sock(__sk)	spin_lock(&((__sk)->sk_lock.slock))
-#define bh_lock_sock_nested(__sk) \
-				spin_lock_nested(&((__sk)->sk_lock.slock), \
-				SINGLE_DEPTH_NESTING)
-#define bh_unlock_sock(__sk)	spin_unlock(&((__sk)->sk_lock.slock))
-
-extern bool lock_sock_fast(struct sock *sk);
-/**
- * unlock_sock_fast - complement of lock_sock_fast
- * @sk: socket
- * @slow: slow mode
- *
- * fast unlock socket for user context.
- * If slow mode is on, we call regular release_sock()
- */
-static inline void unlock_sock_fast(struct sock *sk, bool slow)
-{
-	if (slow)
-		release_sock(sk);
-	else
-		spin_unlock_bh(&sk->sk_lock.slock);
-}
-
-
-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			sock_rfree(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);
-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);
-
-#ifdef CONFIG_CGROUPS
-extern void sock_update_classid(struct sock *sk);
-#else
-static inline void sock_update_classid(struct sock *sk)
-{
-}
-#endif
-
-/*
- * 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);
-
-/*
- * 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,
-				  char __user *optval, int __user *optlen);
-extern 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,
-				  char __user *optval, unsigned int optlen);
-extern 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 optname, char __user *optval, unsigned int optlen);
-
-extern 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);
-
-extern void sk_filter_release_rcu(struct rcu_head *rcu);
-
-/**
- *	sk_filter_release - release a socket filter
- *	@fp: filter to remove
- *
- *	Remove a filter from a socket and release its resources.
- */
-
-static inline void sk_filter_release(struct sk_filter *fp)
-{
-	if (atomic_dec_and_test(&fp->refcnt))
-		call_rcu(&fp->rcu, sk_filter_release_rcu);
-}
-
-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);
-	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);
-}
-
-/*
- * Socket reference counting postulates.
- *
- * * Each user of socket SHOULD hold a reference count.
- * * Each access point to socket (an hash table bucket, reference from a list,
- *   running timer, skb in flight MUST hold a reference count.
- * * When reference count hits 0, it means it will never increase back.
- * * When reference count hits 0, it means that no references from
- *   outside exist to this socket and current process on current CPU
- *   is last user and may/should destroy this socket.
- * * sk_free is called from any context: process, BH, IRQ. When
- *   it is called, socket has no references from outside -> sk_free
- *   may release descendant resources allocated by the socket, but
- *   to the time when it is called, socket is NOT referenced by any
- *   hash tables, lists etc.
- * * Packets, delivered from outside (from network or from another process)
- *   and enqueued on receive/error queues SHOULD NOT grab reference count,
- *   when they sit in queue. Otherwise, packets will leak to hole, when
- *   socket is looked up by one cpu and unhasing is made by another CPU.
- *   It is true for udp/raw, netlink (leak to receive and error queues), tcp
- *   (leak to backlog). Packet socket does all the processing inside
- *   BR_NETPROTO_LOCK, so that it has not this race condition. UNIX sockets
- *   use separate SMP lock, so that they are prone too.
- */
-
-/* Ungrab socket and destroy it, if it was the last reference. */
-static inline void sock_put(struct sock *sk)
-{
-	if (atomic_dec_and_test(&sk->sk_refcnt))
-		sk_free(sk);
-}
-
-extern 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)
-{
-	sk->sk_tx_queue_mapping = tx_queue;
-}
-
-static inline void sk_tx_queue_clear(struct sock *sk)
-{
-	sk->sk_tx_queue_mapping = -1;
-}
-
-static inline int sk_tx_queue_get(const struct sock *sk)
-{
-	return sk ? sk->sk_tx_queue_mapping : -1;
-}
-
-static inline void sk_set_socket(struct sock *sk, struct socket *sock)
-{
-	sk_tx_queue_clear(sk);
-	sk->sk_socket = sock;
-}
-
-static inline wait_queue_head_t *sk_sleep(struct sock *sk)
-{
-	BUILD_BUG_ON(offsetof(struct socket_wq, wait) != 0);
-	return &rcu_dereference_raw(sk->sk_wq)->wait;
-}
-/* Detach socket from process context.
- * Announce socket dead, detach it from wait queue and inode.
- * Note that parent inode held reference count on this struct sock,
- * we do not release it in this function, because protocol
- * probably wants some additional cleanups or even continuing
- * to work with this socket (TCP).
- */
-static inline void sock_orphan(struct sock *sk)
-{
-	write_lock_bh(&sk->sk_callback_lock);
-	sock_set_flag(sk, SOCK_DEAD);
-	sk_set_socket(sk, NULL);
-	sk->sk_wq  = NULL;
-	write_unlock_bh(&sk->sk_callback_lock);
-}
-
-static inline void sock_graft(struct sock *sk, struct socket *parent)
-{
-	write_lock_bh(&sk->sk_callback_lock);
-	sk->sk_wq = parent->wq;
-	parent->sk = sk;
-	sk_set_socket(sk, parent);
-	security_sock_graft(sk, parent);
-	write_unlock_bh(&sk->sk_callback_lock);
-}
-
-extern int sock_i_uid(struct sock *sk);
-extern unsigned long sock_i_ino(struct sock *sk);
-
-static inline struct dst_entry *
-__sk_dst_get(struct sock *sk)
-{
-	return rcu_dereference_check(sk->sk_dst_cache, sock_owned_by_user(sk) ||
-						       lockdep_is_held(&sk->sk_lock.slock));
-}
-
-static inline struct dst_entry *
-sk_dst_get(struct sock *sk)
-{
-	struct dst_entry *dst;
-
-	rcu_read_lock();
-	dst = rcu_dereference(sk->sk_dst_cache);
-	if (dst)
-		dst_hold(dst);
-	rcu_read_unlock();
-	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);
-
-	if (dst && dst->ops->negative_advice) {
-		ndst = dst->ops->negative_advice(dst);
-
-		if (ndst != dst) {
-			rcu_assign_pointer(sk->sk_dst_cache, ndst);
-			sk_reset_txq(sk);
-		}
-	}
-}
-
-static inline void
-__sk_dst_set(struct sock *sk, struct dst_entry *dst)
-{
-	struct dst_entry *old_dst;
-
-	sk_tx_queue_clear(sk);
-	/*
-	 * This can be called while sk is owned by the caller only,
-	 * with no state that can be checked in a rcu_dereference_check() cond
-	 */
-	old_dst = rcu_dereference_raw(sk->sk_dst_cache);
-	rcu_assign_pointer(sk->sk_dst_cache, dst);
-	dst_release(old_dst);
-}
-
-static inline void
-sk_dst_set(struct sock *sk, struct dst_entry *dst)
-{
-	spin_lock(&sk->sk_dst_lock);
-	__sk_dst_set(sk, dst);
-	spin_unlock(&sk->sk_dst_lock);
-}
-
-static inline void
-__sk_dst_reset(struct sock *sk)
-{
-	__sk_dst_set(sk, NULL);
-}
-
-static inline void
-sk_dst_reset(struct sock *sk)
-{
-	spin_lock(&sk->sk_dst_lock);
-	__sk_dst_reset(sk);
-	spin_unlock(&sk->sk_dst_lock);
-}
-
-extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
-
-extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
-
-static inline int 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);
-
-static inline void sk_nocaps_add(struct sock *sk, netdev_features_t flags)
-{
-	sk->sk_route_nocaps |= flags;
-	sk->sk_route_caps &= ~flags;
-}
-
-static inline int skb_do_copy_data_nocache(struct sock *sk, struct sk_buff *skb,
-					   char __user *from, char *to,
-					   int copy, int offset)
-{
-	if (skb->ip_summed == CHECKSUM_NONE) {
-		int err = 0;
-		__wsum csum = csum_and_copy_from_user(from, to, copy, 0, &err);
-		if (err)
-			return err;
-		skb->csum = csum_block_add(skb->csum, csum, offset);
-	} else if (sk->sk_route_caps & NETIF_F_NOCACHE_COPY) {
-		if (!access_ok(VERIFY_READ, from, copy) ||
-		    __copy_from_user_nocache(to, from, copy))
-			return -EFAULT;
-	} else if (copy_from_user(to, from, copy))
-		return -EFAULT;
-
-	return 0;
-}
-
-static inline int skb_add_data_nocache(struct sock *sk, struct sk_buff *skb,
-				       char __user *from, int copy)
-{
-	int err, offset = skb->len;
-
-	err = skb_do_copy_data_nocache(sk, skb, from, skb_put(skb, copy),
-				       copy, offset);
-	if (err)
-		__skb_trim(skb, offset);
-
-	return err;
-}
-
-static inline int skb_copy_to_page_nocache(struct sock *sk, char __user *from,
-					   struct sk_buff *skb,
-					   struct page *page,
-					   int off, int copy)
-{
-	int err;
-
-	err = skb_do_copy_data_nocache(sk, skb, from, page_address(page) + off,
-				       copy, skb->len);
-	if (err)
-		return err;
-
-	skb->len	     += copy;
-	skb->data_len	     += copy;
-	skb->truesize	     += copy;
-	sk->sk_wmem_queued   += copy;
-	sk_mem_charge(sk, copy);
-	return 0;
-}
-
-static inline int skb_copy_to_page(struct sock *sk, char __user *from,
-				   struct sk_buff *skb, struct page *page,
-				   int off, int copy)
-{
-	if (skb->ip_summed == CHECKSUM_NONE) {
-		int err = 0;
-		__wsum csum = csum_and_copy_from_user(from,
-						     page_address(page) + off,
-							    copy, 0, &err);
-		if (err)
-			return err;
-		skb->csum = csum_block_add(skb->csum, csum, skb->len);
-	} else if (copy_from_user(page_address(page) + off, from, copy))
-		return -EFAULT;
-
-	skb->len	     += copy;
-	skb->data_len	     += copy;
-	skb->truesize	     += copy;
-	sk->sk_wmem_queued   += copy;
-	sk_mem_charge(sk, copy);
-	return 0;
-}
-
-/**
- * sk_wmem_alloc_get - returns write allocations
- * @sk: socket
- *
- * Returns sk_wmem_alloc minus initial offset of one
- */
-static inline int sk_wmem_alloc_get(const struct sock *sk)
-{
-	return atomic_read(&sk->sk_wmem_alloc) - 1;
-}
-
-/**
- * sk_rmem_alloc_get - returns read allocations
- * @sk: socket
- *
- * Returns sk_rmem_alloc
- */
-static inline int sk_rmem_alloc_get(const struct sock *sk)
-{
-	return atomic_read(&sk->sk_rmem_alloc);
-}
-
-/**
- * sk_has_allocations - check if allocations are outstanding
- * @sk: socket
- *
- * Returns true if socket has write or read allocations
- */
-static inline int sk_has_allocations(const struct sock *sk)
-{
-	return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
-}
-
-/**
- * wq_has_sleeper - check if there are any waiting processes
- * @wq: struct socket_wq
- *
- * Returns true if socket_wq has waiting processes
- *
- * The purpose of the wq_has_sleeper and sock_poll_wait is to wrap the memory
- * barrier call. They were added due to the race found within the tcp code.
- *
- * Consider following tcp code paths:
- *
- * CPU1                  CPU2
- *
- * sys_select            receive packet
- *   ...                 ...
- *   __add_wait_queue    update tp->rcv_nxt
- *   ...                 ...
- *   tp->rcv_nxt check   sock_def_readable
- *   ...                 {
- *   schedule               rcu_read_lock();
- *                          wq = rcu_dereference(sk->sk_wq);
- *                          if (wq && waitqueue_active(&wq->wait))
- *                              wake_up_interruptible(&wq->wait)
- *                          ...
- *                       }
- *
- * The race for tcp fires when the __add_wait_queue changes done by CPU1 stay
- * in its cache, and so does the tp->rcv_nxt update on CPU2 side.  The CPU1
- * could then endup calling schedule and sleep forever if there are no more
- * data on the socket.
- *
- */
-static inline bool wq_has_sleeper(struct socket_wq *wq)
-{
-
-	/*
-	 * We need to be sure we are in sync with the
-	 * add_wait_queue modifications to the wait queue.
-	 *
-	 * This memory barrier is paired in the sock_poll_wait.
-	 */
-	smp_mb();
-	return wq && waitqueue_active(&wq->wait);
-}
-
-/**
- * sock_poll_wait - place memory barrier behind the poll_wait call.
- * @filp:           file
- * @wait_address:   socket wait queue
- * @p:              poll_table
- *
- * See the comments in the wq_has_sleeper function.
- */
-static inline void sock_poll_wait(struct file *filp,
-		wait_queue_head_t *wait_address, poll_table *p)
-{
-	if (!poll_does_not_wait(p) && wait_address) {
-		poll_wait(filp, wait_address, p);
-		/*
-		 * We need to be sure we are in sync with the
-		 * socket flags modification.
-		 *
-		 * This memory barrier is paired in the wq_has_sleeper.
-		*/
-		smp_mb();
-	}
-}
-
-/*
- * 	Queue a received datagram if it will fit. Stream and sequenced
- *	protocols can't normally use this as they need to fit buffers in
- *	and play with them.
- *
- * 	Inlined as it's very short and called for pretty much every
- *	packet ever received.
- */
-
-static inline void skb_set_owner_w(struct sk_buff *skb, struct sock *sk)
-{
-	skb_orphan(skb);
-	skb->sk = sk;
-	skb->destructor = sock_wfree;
-	/*
-	 * We used to take a refcount on sk, but following operation
-	 * is enough to guarantee sk_free() wont free this sock until
-	 * all in-flight packets are completed
-	 */
-	atomic_add(skb->truesize, &sk->sk_wmem_alloc);
-}
-
-static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
-{
-	skb_orphan(skb);
-	skb->sk = sk;
-	skb->destructor = sock_rfree;
-	atomic_add(skb->truesize, &sk->sk_rmem_alloc);
-	sk_mem_charge(sk, skb->truesize);
-}
-
-extern 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);
-
-extern 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);
-
-/*
- *	Recover an error report and clear atomically
- */
- 
-static inline int sock_error(struct sock *sk)
-{
-	int err;
-	if (likely(!sk->sk_err))
-		return 0;
-	err = xchg(&sk->sk_err, 0);
-	return -err;
-}
-
-static inline unsigned long sock_wspace(struct sock *sk)
-{
-	int amt = 0;
-
-	if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
-		amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
-		if (amt < 0) 
-			amt = 0;
-	}
-	return amt;
-}
-
-static inline void sk_wake_async(struct sock *sk, int how, int band)
-{
-	if (sock_flag(sk, SOCK_FASYNC))
-		sock_wake_async(sk->sk_socket, how, band);
-}
-
-#define SOCK_MIN_SNDBUF 2048
-/*
- * Since sk_rmem_alloc sums skb->truesize, even a small frame might need
- * sizeof(sk_buff) + MTU + padding, unless net driver perform copybreak
- */
-#define SOCK_MIN_RCVBUF (2048 + sizeof(struct sk_buff))
-
-static inline void sk_stream_moderate_sndbuf(struct sock *sk)
-{
-	if (!(sk->sk_userlocks & SOCK_SNDBUF_LOCK)) {
-		sk->sk_sndbuf = min(sk->sk_sndbuf, sk->sk_wmem_queued >> 1);
-		sk->sk_sndbuf = max(sk->sk_sndbuf, SOCK_MIN_SNDBUF);
-	}
-}
-
-struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp);
-
-static inline struct page *sk_stream_alloc_page(struct sock *sk)
-{
-	struct page *page = NULL;
-
-	page = alloc_pages(sk->sk_allocation, 0);
-	if (!page) {
-		sk_enter_memory_pressure(sk);
-		sk_stream_moderate_sndbuf(sk);
-	}
-	return page;
-}
-
-/*
- *	Default write policy as shown to user space via poll/select/SIGIO
- */
-static inline int sock_writeable(const struct sock *sk) 
-{
-	return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
-}
-
-static inline gfp_t gfp_any(void)
-{
-	return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
-}
-
-static inline long sock_rcvtimeo(const struct sock *sk, int noblock)
-{
-	return noblock ? 0 : sk->sk_rcvtimeo;
-}
-
-static inline long sock_sndtimeo(const struct sock *sk, int noblock)
-{
-	return noblock ? 0 : sk->sk_sndtimeo;
-}
-
-static inline int sock_rcvlowat(const struct sock *sk, int waitall, int len)
-{
-	return (waitall ? len : min_t(int, sk->sk_rcvlowat, len)) ? : 1;
-}
-
-/* Alas, with timeout socket operations are not restartable.
- * Compare this to poll().
- */
-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);
-
-static __inline__ void
-sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
-{
-	ktime_t kt = skb->tstamp;
-	struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
-
-	/*
-	 * generate control messages if
-	 * - receive time stamping in software requested (SOCK_RCVTSTAMP
-	 *   or SOCK_TIMESTAMPING_RX_SOFTWARE)
-	 * - software time stamp available and wanted
-	 *   (SOCK_TIMESTAMPING_SOFTWARE)
-	 * - hardware time stamps available and wanted
-	 *   (SOCK_TIMESTAMPING_SYS_HARDWARE or
-	 *   SOCK_TIMESTAMPING_RAW_HARDWARE)
-	 */
-	if (sock_flag(sk, SOCK_RCVTSTAMP) ||
-	    sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
-	    (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) ||
-	    (hwtstamps->hwtstamp.tv64 &&
-	     sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) ||
-	    (hwtstamps->syststamp.tv64 &&
-	     sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)))
-		__sock_recv_timestamp(msg, sk, skb);
-	else
-		sk->sk_stamp = kt;
-
-	if (sock_flag(sk, SOCK_WIFI_STATUS) && skb->wifi_acked_valid)
-		__sock_recv_wifi_status(msg, sk, skb);
-}
-
-extern 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)
-{
-#define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL)			| \
-			   (1UL << SOCK_RCVTSTAMP)			| \
-			   (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)	| \
-			   (1UL << SOCK_TIMESTAMPING_SOFTWARE)		| \
-			   (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE) 	| \
-			   (1UL << SOCK_TIMESTAMPING_SYS_HARDWARE))
-
-	if (sk->sk_flags & FLAGS_TS_OR_DROPS)
-		__sock_recv_ts_and_drops(msg, sk, skb);
-	else
-		sk->sk_stamp = skb->tstamp;
-}
-
-/**
- * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
- * @sk:		socket sending this packet
- * @tx_flags:	filled with instructions for time stamping
- *
- * Currently only depends on SOCK_TIMESTAMPING* flags. Returns error code if
- * parameters are invalid.
- */
-extern int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
-
-/**
- * sk_eat_skb - Release a skb if it is no longer needed
- * @sk: socket to eat this skb from
- * @skb: socket buffer to eat
- * @copied_early: flag indicating whether DMA operations copied this data early
- *
- * This routine must be called with interrupts disabled or with the socket
- * locked so that the sk_buff queue operation is ok.
-*/
-#ifdef CONFIG_NET_DMA
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
-{
-	__skb_unlink(skb, &sk->sk_receive_queue);
-	if (!copied_early)
-		__kfree_skb(skb);
-	else
-		__skb_queue_tail(&sk->sk_async_wait_queue, skb);
-}
-#else
-static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_early)
-{
-	__skb_unlink(skb, &sk->sk_receive_queue);
-	__kfree_skb(skb);
-}
-#endif
-
-static inline
-struct net *sock_net(const struct sock *sk)
-{
-	return read_pnet(&sk->sk_net);
-}
-
-static inline
-void sock_net_set(struct sock *sk, struct net *net)
-{
-	write_pnet(&sk->sk_net, net);
-}
-
-/*
- * Kernel sockets, f.e. rtnl or icmp_socket, are a part of a namespace.
- * They should not hold a reference to a namespace in order to allow
- * to stop it.
- * Sockets after sk_change_net should be released using sk_release_kernel
- */
-static inline void sk_change_net(struct sock *sk, struct net *net)
-{
-	put_net(sock_net(sk));
-	sock_net_set(sk, hold_net(net));
-}
-
-static inline struct sock *skb_steal_sock(struct sk_buff *skb)
-{
-	if (unlikely(skb->sk)) {
-		struct sock *sk = skb->sk;
-
-		skb->destructor = NULL;
-		skb->sk = NULL;
-		return sk;
-	}
-	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 *);
-
-/* 
- *	Enable debug/info messages 
- */
-extern int net_msg_warn;
-#define NETDEBUG(fmt, args...) \
-	do { if (net_msg_warn) printk(fmt,##args); } while (0)
-
-#define LIMIT_NETDEBUG(fmt, args...) \
-	do { if (net_msg_warn && net_ratelimit()) printk(fmt,##args); } while(0)
-
-extern __u32 sysctl_wmem_max;
-extern __u32 sysctl_rmem_max;
-
-extern void sk_init(void);
-
-extern int sysctl_optmem_max;
-
-extern __u32 sysctl_wmem_default;
-extern __u32 sysctl_rmem_default;
-
-#endif	/* _SOCK_H */