Release 4.7 include/net/sock.h

/*
 * 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/bitops.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/page_counter.h>
#include <linux/memcontrol.h>
#include <linux/static_key.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/cgroup-defs.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>
#include <net/tcp_states.h>
#include <linux/net_tstamp.h>

/*
 * 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(const 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;


typedef __u32 __bitwise __portpair;

typedef __u64 __bitwise __addrpair;

/**
 *      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_dport: placeholder for inet_dport/tw_dport
 *      @skc_num: placeholder for inet_num/tw_num
 *      @skc_family: network address family
 *      @skc_state: Connection state
 *      @skc_reuse: %SO_REUSEADDR setting
 *      @skc_reuseport: %SO_REUSEPORT 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_flags: place holder for sk_flags
 *              %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
 *              %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
 *      @skc_incoming_cpu: record/match cpu processing incoming packets
 *      @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 on a 8 bytes aligned
         * address on 64bit arches : cf INET_MATCH()
         */
	union {
		
__addrpair	skc_addrpair;
		struct {
			
__be32	skc_daddr;
			
__be32	skc_rcv_saddr;
		};
	};
	union  {
		
unsigned int	skc_hash;
		
__u16		skc_u16hashes[2];
	};
	/* skc_dport && skc_num must be grouped as well */
	union {
		
__portpair	skc_portpair;
		struct {
			
__be16	skc_dport;
			
__u16	skc_num;
		};
	};

	
unsigned short		skc_family;
	
volatile unsigned char	skc_state;
	
unsigned char		skc_reuse:4;
	
unsigned char		skc_reuseport:1;
	
unsigned char		skc_ipv6only:1;
	
unsigned char		skc_net_refcnt:1;
	
int			skc_bound_dev_if;
	union {
		
struct hlist_node	skc_bind_node;
		
struct hlist_node	skc_portaddr_node;
	};
	
struct proto		*skc_prot;
	
possible_net_t		skc_net;

#if IS_ENABLED(CONFIG_IPV6)
	
struct in6_addr		skc_v6_daddr;
	
struct in6_addr		skc_v6_rcv_saddr;
#endif

	
atomic64_t		skc_cookie;

	/* following fields are padding to force
         * offset(struct sock, sk_refcnt) == 128 on 64bit arches
         * assuming IPV6 is enabled. We use this padding differently
         * for different kind of 'sockets'
         */
	union {
		
unsigned long	skc_flags;
		
struct sock	*skc_listener; /* request_sock */
		
struct inet_timewait_death_row *skc_tw_dr; /* inet_timewait_sock */
	};
	/*
         * 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;
	union {
		
int		skc_incoming_cpu;
		
u32		skc_rcv_wnd;
		
u32		skc_tw_rcv_nxt; /* struct tcp_timewait_sock  */
	};

	
atomic_t		skc_refcnt;
	/* private: */
	
int                     skc_dontcopy_end[0];
	union {
		
u32		skc_rxhash;
		
u32		skc_window_clamp;
		
u32		skc_tw_snd_nxt; /* struct tcp_timewait_sock */
	};
	/* public: */
};

/**
  *     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_rx_dst: receive input route used by early demux
  *     @sk_dst_cache: destination cache
  *     @sk_policy: flow policy
  *     @sk_receive_queue: incoming packets
  *     @sk_wmem_alloc: transmit queue bytes committed
  *     @sk_write_queue: Packet sending queue
  *     @sk_omem_alloc: "o" is "option" or "other"
  *     @sk_wmem_queued: persistent queue size
  *     @sk_forward_alloc: space allocated forward
  *     @sk_napi_id: id of the last napi context to receive data for sk
  *     @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_no_check_tx: %SO_NO_CHECK setting, set checksum in TX packets
  *     @sk_no_check_rx: allow zero checksum in RX 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_gso_max_segs: Maximum number of GSO segments
  *     @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_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_txhash: computed flow hash for use on transmit
  *     @sk_filter: socket filtering instructions
  *     @sk_timer: sock cleanup timer
  *     @sk_stamp: time stamp of last packet received
  *     @sk_tsflags: SO_TIMESTAMPING socket options
  *     @sk_tskey: counter to disambiguate concurrent tstamp requests
  *     @sk_socket: Identd and reporting IO signals
  *     @sk_user_data: RPC layer private data
  *     @sk_frag: cached page frag
  *     @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_cgrp_data: cgroup data for this cgroup
  *     @sk_memcg: this socket's memory cgroup association
  *     @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
  *     @sk_reuseport_cb: reuseport group container
 */

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_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

#define sk_reuseport		__sk_common.skc_reuseport

#define sk_ipv6only		__sk_common.skc_ipv6only

#define sk_net_refcnt		__sk_common.skc_net_refcnt

#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

#define sk_v6_daddr		__sk_common.skc_v6_daddr

#define sk_v6_rcv_saddr	__sk_common.skc_v6_rcv_saddr

#define sk_cookie		__sk_common.skc_cookie

#define sk_incoming_cpu		__sk_common.skc_incoming_cpu

#define sk_flags		__sk_common.skc_flags

#define sk_rxhash		__sk_common.skc_rxhash

	
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;

	
__u32			sk_txhash;
#ifdef CONFIG_NET_RX_BUSY_POLL
	
unsigned int		sk_napi_id;
	
unsigned int		sk_ll_usec;
#endif
	
atomic_t		sk_drops;
	
int			sk_rcvbuf;

	
struct sk_filter __rcu	*sk_filter;
	union {
		
struct socket_wq __rcu	*sk_wq;
		
struct socket_wq	*sk_wq_raw;
	};
#ifdef CONFIG_XFRM
	
struct xfrm_policy __rcu *sk_policy[2];
#endif
	
struct dst_entry	*sk_rx_dst;
	
struct dst_entry __rcu	*sk_dst_cache;
	/* Note: 32bit hole on 64bit arches */
	
atomic_t		sk_wmem_alloc;
	
atomic_t		sk_omem_alloc;
	
int			sk_sndbuf;
	
struct sk_buff_head	sk_write_queue;

	/*
         * Because of non atomicity rules, all
         * changes are protected by socket lock.
         */
	kmemcheck_bitfield_begin(flags);
	
unsigned int		sk_padding : 2,
				
sk_no_check_tx : 1,
				
sk_no_check_rx : 1,
				
sk_userlocks : 4,
				
sk_protocol  : 8,
				
sk_type      : 16;

#define SK_PROTOCOL_MAX U8_MAX
	kmemcheck_bitfield_end(flags);

	
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;
	
unsigned int		sk_gso_max_size;
	
u16			sk_gso_max_segs;
	
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;
	
u32			sk_ack_backlog;
	
u32			sk_max_ack_backlog;
	
__u32			sk_priority;
	
__u32			sk_mark;
	
struct pid		*sk_peer_pid;
	
const struct cred	*sk_peer_cred;
	
long			sk_rcvtimeo;
	
long			sk_sndtimeo;
	
struct timer_list	sk_timer;
	
ktime_t			sk_stamp;
	
u16			sk_tsflags;
	
u8			sk_shutdown;
	
u32			sk_tskey;
	
struct socket		*sk_socket;
	
void			*sk_user_data;
	
struct page_frag	sk_frag;
	
struct sk_buff		*sk_send_head;
	
__s32			sk_peek_off;
	
int			sk_write_pending;
#ifdef CONFIG_SECURITY
	
void			*sk_security;
#endif
	
struct sock_cgroup_data	sk_cgrp_data;
	
struct mem_cgroup	*sk_memcg;
	
void			(*sk_state_change)(struct sock *sk);
	
void			(*sk_data_ready)(struct sock *sk);
	
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);
	
struct sock_reuseport __rcu	*sk_reuseport_cb;
	
struct rcu_head		sk_rcu;
};


#define __sk_user_data(sk) ((*((void __rcu **)&(sk)->sk_user_data)))


#define rcu_dereference_sk_user_data(sk)	rcu_dereference(__sk_user_data((sk)))

#define rcu_assign_sk_user_data(sk, ptr)	rcu_assign_pointer(__sk_user_data((sk)), ptr)

/*
 * SK_CAN_REUSE and SK_NO_REUSE on a socket mean that the socket is OK
 * or not whether his port will be reused by someone else. SK_FORCE_REUSE
 * on a socket means that the socket will reuse everybody else's port
 * without looking at the other's sk_reuse value.
 */


#define SK_NO_REUSE	0

#define SK_CAN_REUSE	1

#define SK_FORCE_REUSE	2

int sk_set_peek_off(struct sock *sk, int val);



static inline int sk_peek_offset(struct sock *sk, int flags)
{
	if (unlikely(flags & MSG_PEEK)) {
		s32 off = READ_ONCE(sk->sk_peek_off);
		if (off >= 0)
			return off;
	}

	return 0;
}

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static inline void sk_peek_offset_bwd(struct sock *sk, int val)
{
	s32 off = READ_ONCE(sk->sk_peek_off);

	if (unlikely(off >= 0)) {
		off = max_t(s32, off - val, 0);
		WRITE_ONCE(sk->sk_peek_off, off);
	}
}

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static inline void sk_peek_offset_fwd(struct sock *sk, int val)
{
	sk_peek_offset_bwd(sk, -val);
}

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/*
 * Hashed lists helper routines
 */


static inline struct sock *sk_entry(const struct hlist_node *node)
{
	return hlist_entry(node, struct sock, sk_node);
}

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static inline struct sock *__sk_head(const struct hlist_head *head)
{
	return hlist_entry(head->first, struct sock, sk_node);
}

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static inline struct sock *sk_head(const struct hlist_head *head)
{
	return hlist_empty(head) ? NULL : __sk_head(head);
}

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static inline struct sock *__sk_nulls_head(const struct hlist_nulls_head *head)
{
	return hlist_nulls_entry(head->first, struct sock, sk_nulls_node);
}

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static inline struct sock *sk_nulls_head(const struct hlist_nulls_head *head)
{
	return hlist_nulls_empty(head) ? NULL : __sk_nulls_head(head);
}

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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;
}

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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;
}

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static inline bool sk_unhashed(const struct sock *sk)
{
	return hlist_unhashed(&sk->sk_node);
}

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static inline bool sk_hashed(const struct sock *sk)
{
	return !sk_unhashed(sk);
}

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eric dumazet
eric dumazet
1
5.00%
1
25.00%
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20
100.00%
4
100.00%



static inline void sk_node_init(struct hlist_node *node)
{
	node->pprev = NULL;
}

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17
94.44%
1
50.00%
eric dumazet
eric dumazet
1
5.56%
1
50.00%
Total
18
100.00%
2
100.00%



static inline void sk_nulls_node_init(struct hlist_nulls_node *node)
{
	node->pprev = NULL;
}

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eric dumazet
18
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2
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18
100.00%
2
100.00%



static inline void __sk_del_node(struct sock *sk)
{
	__hlist_del(&sk->sk_node);
}

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19
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1
50.00%
eric dumazet
eric dumazet
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%

/* NB: equivalent to hlist_del_init_rcu */


static inline bool __sk_del_node_init(struct sock *sk)
{
	if (sk_hashed(sk)) {
		__sk_del_node(sk);
		sk_node_init(&sk->sk_node);
		return true;
	}
	return false;
}

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36
90.00%
2
66.67%
eric dumazet
eric dumazet
4
10.00%
1
33.33%
Total
40
100.00%
3
100.00%

/* 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 __always_inline void sock_hold(struct sock *sk)
{
	atomic_inc(&sk->sk_refcnt);
}

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andrew morton
andrew morton
19
95.00%
1
50.00%
denys vlasenko
denys vlasenko
1
5.00%
1
50.00%
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20
100.00%
2
100.00%

/* Ungrab socket in the context, which assumes that socket refcnt
   cannot hit zero, f.e. it is true in context of any socketcall.
 */


static __always_inline void __sock_put(struct sock *sk)
{
	atomic_dec(&sk->sk_refcnt);
}

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andrew morton
andrew morton
10
50.00%
1
33.33%
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arnaldo carvalho de melo
9
45.00%
1
33.33%
denys vlasenko
denys vlasenko
1
5.00%
1
33.33%
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20
100.00%
3
100.00%



static inline bool sk_del_node_init(struct sock *sk)
{
	bool 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;
}
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45
93.75%
1
50.00%
eric dumazet
eric dumazet
3
6.25%
1
50.00%
Total
48
100.00%
2
100.00%


#define sk_del_node_init_rcu(sk)	sk_del_node_init(sk)



static inline bool __sk_nulls_del_node_init_rcu(struct sock *sk)
{
	if (sk_hashed(sk)) {
		hlist_nulls_del_init_rcu(&sk->sk_nulls_node);
		return true;
	}
	return false;
}

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eric dumazet
35
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3
100.00%
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35
100.00%
3
100.00%



static inline bool sk_nulls_del_node_init_rcu(struct sock *sk)
{
	bool 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;
}

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eric dumazet
48
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3
100.00%
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48
100.00%
3
100.00%



static inline void __sk_add_node(struct sock *sk, struct hlist_head *list)
{
	hlist_add_head(&sk->sk_node, list);
}

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26
96.30%
2
66.67%
eric dumazet
eric dumazet
1
3.70%
1
33.33%
Total
27
100.00%
3
100.00%



static inline void sk_add_node(struct sock *sk, struct hlist_head *list)
{
	sock_hold(sk);
	__sk_add_node(sk, list);
}

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arnaldo carvalho de melo
arnaldo carvalho de melo
28
96.55%
1
50.00%
eric dumazet
eric dumazet
1
3.45%
1
50.00%
Total
29
100.00%
2
100.00%



static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
{
	sock_hold(sk);
	if (IS_ENABLED(CONFIG_IPV6) && sk->sk_reuseport &&
	    sk->sk_family == AF_INET6)
		hlist_add_tail_rcu(&sk->sk_node, list);
	else
		hlist_add_head_rcu(&sk->sk_node, list);
}

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stephen hemminger
stephen hemminger
31
51.67%
1
33.33%
craig gallek
craig gallek
28
46.67%
1
33.33%
eric dumazet
eric dumazet
1
1.67%
1
33.33%
Total
60
100.00%
3
100.00%



static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
{
	if (IS_ENABLED(CONFIG_IPV6) && sk->sk_reuseport &&
	    sk->sk_family == AF_INET6)
		hlist_nulls_add_tail_rcu(&sk->sk_nulls_node, list);
	else
		hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
}

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craig gallek
craig gallek
28
50.91%
1
25.00%
eric dumazet
eric dumazet
27
49.09%
3
75.00%
Total
55
100.00%
4
100.00%



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);
}

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eric dumazet
29
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3
100.00%
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29
100.00%
3
100.00%



static inline void __sk_del_bind_node(struct sock *sk)
{
	__hlist_del(&sk->sk_bind_node);
}

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eric dumazet
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%



static inline void sk_add_bind_node(struct sock *sk,
					struct hlist_head *list)
{
	hlist_add_head(&sk->sk_bind_node, list);
}

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1
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eric dumazet
eric dumazet
1
3.70%
1
50.00%
Total
27
100.00%
2
100.00%


#define sk_for_each(__sk, list) \
	hlist_for_each_entry(__sk, list, sk_node)

#define sk_for_each_rcu(__sk, list) \
	hlist_for_each_entry_rcu(__sk, 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) \
	hlist_for_each_entry_from(__sk, 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, tmp, list) \
	hlist_for_each_entry_safe(__sk, tmp, list, sk_node)

#define sk_for_each_bound(__sk, list) \
	hlist_for_each_entry(__sk, list, sk_bind_node)

/**
 * sk_for_each_entry_offset_rcu - iterate over a list at a given struct offset
 * @tpos:       the type * to use as a loop cursor.
 * @pos:        the &struct hlist_node to use as a loop cursor.
 * @head:       the head for your list.
 * @offset:     offset of hlist_node within the struct.
 *
 */

#define sk_for_each_entry_offset_rcu(tpos, pos, head, offset)		       \
	for (pos = rcu_dereference((head)->first);                             \
             pos != NULL &&                                                    \
                ({ tpos = (typeof(*tpos) *)((void *)pos - offset); 1;});       \
             pos = rcu_dereference(pos->next))



static inline struct user_namespace *sk_user_ns(struct sock *sk)
{
	/* Careful only use this in a context where these parameters
         * can not change and must all be valid, such as recvmsg from
         * userspace.
         */
	return sk->sk_socket->file->f_cred->user_ns;
}

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eric w. biederman
eric w. biederman
26
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1
100.00%
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26
100.00%
1
100.00%

/* 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_MEMALLOC, /* VM depends on this socket for swapping */
	
SOCK_TIMESTAMPING_RX_SOFTWARE,  /* %SOF_TIMESTAMPING_RX_SOFTWARE */
	
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.
                     */
	
SOCK_FILTER_LOCKED, /* Filter cannot be changed anymore */
	
SOCK_SELECT_ERR_QUEUE, /* Wake select on error queue */
	
SOCK_RCU_FREE, /* wait rcu grace period in sk_destruct() */
};


#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))



static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
{
	nsk->sk_flags = osk->sk_flags;
}

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ralf baechle
ralf baechle
25
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1
100.00%
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25
100.00%
1
100.00%



static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)
{
	__set_bit(flag, &sk->sk_flags);
}

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26
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2
100.00%



static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)
{
	__clear_bit(flag, &sk->sk_flags);
}

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static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
{
	return test_bit(flag, &sk->sk_flags);
}

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2
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eric dumazet
eric dumazet
2
7.14%
1
33.33%
Total
28
100.00%
3
100.00%

#ifdef CONFIG_NET
extern struct static_key memalloc_socks;


static inline int sk_memalloc_socks(void)
{
	return static_key_false(&memalloc_socks);
}
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mel gorman
16
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1
100.00%
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16
100.00%
1
100.00%

#else



static inline int sk_memalloc_socks(void)
{
	return 0;
}

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mel gorman
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12
100.00%
1
100.00%

#endif



static inline gfp_t sk_gfp_mask(const struct sock *sk, gfp_t gfp_mask)
{
	return gfp_mask | (sk->sk_allocation & __GFP_MEMALLOC);
}

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mel gorman
mel gorman
24
88.89%
2
50.00%
eric dumazet
eric dumazet
3
11.11%
2
50.00%
Total
27
100.00%
4
100.00%



static inline void sk_acceptq_removed(struct sock *sk)
{
	sk->sk_ack_backlog--;
}

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1
100.00%
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17
100.00%
1
100.00%



static inline void sk_acceptq_added(struct sock *sk)
{
	sk->sk_ack_backlog++;
}

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17
100.00%
1
100.00%



static inline bool sk_acceptq_is_full(const struct sock *sk)
{
	return sk->sk_ack_backlog > sk->sk_max_ack_backlog;
}

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19
86.36%
1
33.33%
eric dumazet
eric dumazet
2
9.09%
1
33.33%
david s. miller
david s. miller
1
4.55%
1
33.33%
Total
22
100.00%
3
100.00%

/*
 * Compute minimal free write space needed to queue new packets.
 */


static inline int sk_stream_min_wspace(const struct sock *sk)
{
	return sk->sk_wmem_queued >> 1;
}

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eric dumazet
eric dumazet
3
15.00%
2
66.67%
Total
20
100.00%
3
100.00%



static inline int sk_stream_wspace(const struct sock *sk)
{
	return sk->sk_sndbuf - sk->sk_wmem_queued;
}

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21
95.45%
1
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eric dumazet
eric dumazet
1
4.55%
1
50.00%
Total
22
100.00%
2
100.00%

void sk_stream_write_space(struct sock *sk);

/* 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_safe(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;
}

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stephen hemminger
stephen hemminger
55
84.62%
1
20.00%
eric dumazet
eric dumazet
6
9.23%
2
40.00%
pre-git
pre-git
3
4.62%
1
20.00%
yi zhu
yi zhu
1
1.54%
1
20.00%
Total
65
100.00%
5
100.00%

/*
 * 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, unsigned int limit)
{
	unsigned int qsize = sk->sk_backlog.len + atomic_read(&sk->sk_rmem_alloc);

	return qsize > limit;
}

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eric dumazet
eric dumazet
22
55.00%
2
66.67%
yi zhu
yi zhu
18
45.00%
1
33.33%
Total
40
100.00%
3
100.00%

/* The per-socket spinlock must be held here. */


static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *skb,
					      unsigned int limit)
{
	if (sk_rcvqueues_full(sk, limit))
		return -ENOBUFS;

	/*
         * If the skb was allocated from pfmemalloc reserves, only
         * allow SOCK_MEMALLOC sockets to use it as this socket is
         * helping free memory
         */
	if (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC))
		return -ENOMEM;

	__sk_add_backlog(sk, skb);
	sk->sk_backlog.len += skb->truesize;
	return 0;
}

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eric dumazet
eric dumazet
48
64.00%
3
60.00%
yi zhu
yi zhu
27
36.00%
2
40.00%
Total
75
100.00%
5
100.00%

int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);



static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
	if (sk_memalloc_socks() && skb_pfmemalloc(skb))
		return __sk_backlog_rcv(sk, skb);

	return sk->sk_backlog_rcv(sk, skb);
}

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peter zijlstra
peter zijlstra
27
60.00%
1
50.00%
mel gorman
mel gorman
18
40.00%
1
50.00%
Total
45
100.00%
2
100.00%



static inline void sk_incoming_cpu_update(struct sock *sk)
{
	sk->sk_incoming_cpu = raw_smp_processor_id();
}

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eric dumazet
19
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1
100.00%
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19
100.00%
1
100.00%



static inline void sock_rps_record_flow_hash(__u32 hash)
{
#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, hash);
	rcu_read_unlock();
#endif
}

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david s. miller
36
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1
50.00%
tom herbert
tom herbert
4
10.00%
1
50.00%
Total
40
100.00%
2
100.00%



static inline void sock_rps_record_flow(const struct sock *sk)
{
#ifdef CONFIG_RPS
	sock_rps_record_flow_hash(sk->sk_rxhash);
#endif
}

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tom herbert
tom herbert
20
80.00%
1
50.00%
zhi yong wu
zhi yong wu
5
20.00%
1
50.00%
Total
25
100.00%
2
100.00%



static inline void sock_rps_save_rxhash(struct sock *sk,
					const struct sk_buff *skb)
{
#ifdef CONFIG_RPS
	if (unlikely(sk->sk_rxhash != skb->hash))
		sk->sk_rxhash = skb->hash;
#endif
}

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david s. miller
david s. miller
33
75.00%
1
33.33%
tom herbert
tom herbert
11
25.00%
2
66.67%
Total
44
100.00%
3
100.00%



static inline void sock_rps_reset_rxhash(struct sock *sk)
{
#ifdef CONFIG_RPS
	sk->sk_rxhash = 0;
#endif
}

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tom herbert
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23
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1
100.00%


#define sk_wait_event(__sk, __timeo, __condition)			\
	({      int __rc;                                               \
                release_sock(__sk);                                     \
                __rc = __condition;                                     \
                if (!__rc) {                                            \
                        *(__timeo) = schedule_timeout(*(__timeo));      \
                }                                                       \
                sched_annotate_sleep();                                         \
                lock_sock(__sk);                                        \
                __rc = __condition;                                     \
                __rc;                                                   \
        })

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);

void __sk_flush_backlog(struct sock *sk);



static inline bool sk_flush_backlog(struct sock *sk)
{
	if (unlikely(READ_ONCE(sk->sk_backlog.tail))) {
		__sk_flush_backlog(sk);
		return true;
	}
	return false;
}

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int sk_wait_data(struct sock *sk, long *timeo, const struct sk_buff *skb);

struct request_sock_ops;
struct timewait_sock_ops;
struct inet_hashinfo;
struct raw_hashinfo;
struct module;

/*
 * caches using SLAB_DESTROY_BY_RCU should let .next pointer from nulls nodes
 * un-modified. Special care is taken when initializing object to zero.
 */


static inline void sk_prot_clear_nulls(struct sock *sk, int size)
{
	if (offsetof(struct sock, sk_node.next) != 0)
		memset(sk, 0, offsetof(struct sock, sk_node.next));
	memset(&sk->sk_node.pprev, 0,
	       size - offsetof(struct sock, sk_node.pprev));
}

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/* Networking protocol blocks we attach to sockets.
 * socket layer -> transport layer interface
 */

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 sock *sk, struct msghdr *msg,
					   size_t len);
	
int			(*recvmsg)(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);

	
void		(*release_cb)(struct sock *sk);

	/* Keeping track of sk's, looking them up, and port selection methods. */
	
int			(*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

	
bool			(*stream_memory_free)(const struct sock *sk);
	/* 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
	
int			(*diag_destroy)(struct sock *sk, int err);
};

int proto_register(struct proto *prot, int alloc_slab);
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);
}

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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));
}

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static 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));
}
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#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 */



static inline bool sk_stream_memory_free(const struct sock *sk)
{
	if (sk->sk_wmem_queued >= sk->sk_sndbuf)
		return false;

	return sk->sk_prot->stream_memory_free ?
		sk->sk_prot->stream_memory_free(sk) : true;
}

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static inline bool sk_stream_is_writeable(const struct sock *sk)
{
	return sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) &&
	       sk_stream_memory_free(sk);
}


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static inline bool sk_has_memory_pressure(const struct sock *sk)
{
	return sk->sk_prot->memory_pressure != NULL;
}

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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_memcg &&
	    mem_cgroup_under_socket_pressure(sk->sk_memcg))
		return true;

	return !!*sk->sk_prot->memory_pressure;
}

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glauber costa
43
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2
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johannes weiner
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christoph paasch
christoph paasch
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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;
}

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static inline void sk_enter_memory_pressure(struct sock *sk)
{
	if (!sk->sk_prot->enter_memory_pressure)
		return;

	sk->sk_prot->enter_memory_pressure(sk);
}

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static inline long sk_prot_mem_limits(const struct sock *sk, int index)
{
	return sk->sk_prot->sysctl_mem[index];
}

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glauber costa
22
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1
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johannes weiner
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2
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3
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static inline long

sk_memory_allocated(const struct sock *sk)
{
	return atomic_long_read(sk->sk_prot->memory_allocated);
}

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glauber costa
21
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2
66.67%
johannes weiner
johannes weiner
2
8.70%
1
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23
100.00%
3
100.00%


static inline long

sk_memory_allocated_add(struct sock *sk, int amt)
{
	return atomic_long_add_return(amt, sk->sk_prot->memory_allocated);
}

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25
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2
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2
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1
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27
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static inline void

sk_memory_allocated_sub(struct sock *sk, int amt)
{
	atomic_long_sub(amt, sk->sk_prot->memory_allocated);
}

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1
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static inline void sk_sockets_allocated_dec(struct sock *sk)
{
	percpu_counter_dec(sk->sk_prot->sockets_allocated);
}

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johannes weiner
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1
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static inline void sk_sockets_allocated_inc(struct sock *sk)
{
	percpu_counter_inc(sk->sk_prot->sockets_allocated);
}

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2
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johannes weiner
2
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1
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21
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3
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static inline int

sk_sockets_allocated_read_positive(struct sock *sk)
{
	return percpu_counter_read_positive(sk->sk_prot->sockets_allocated);
}

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johannes weiner
1
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eric dumazet
eric dumazet
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static inline int

proto_sockets_allocated_sum_positive(struct proto *prot)
{
	return percpu_counter_sum_positive(prot->sockets_allocated);
}

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static inline long

proto_memory_allocated(struct proto *prot)
{
	return atomic_long_read(prot->memory_allocated);
}

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20
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static inline bool

proto_memory_pressure(struct proto *prot)
{
	if (!prot->memory_pressure)
		return false;
	return !!*prot->memory_pressure;
}


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#ifdef CONFIG_PROC_FS
/* Called with local bh disabled */
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)
{
}
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#endif


/* With per-bucket locks this operation is not-atomic, so that
 * this version is not worse.
 */


static inline int __sk_prot_rehash(struct sock *sk)
{
	sk->sk_prot->unhash(sk);
	return sk->sk_prot->hash(sk);
}

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28
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craig gallek
craig gallek
3
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31
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2
100.00%

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


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;
}

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christoph hellwig
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28
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static inline struct inode *SOCK_INODE(struct socket *socket)
{
	return &container_of(socket, struct socket_alloc, socket)->vfs_inode;
}

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christoph hellwig
christoph hellwig
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1
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28
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1
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/*
 * Functions for memory accounting
 */
int __sk_mem_schedule(struct sock *sk, int size, int kind);
void __sk_mem_reclaim(struct sock *sk, int amount);


#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;
}

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6
28.57%
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3
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static inline bool sk_has_account(struct sock *sk)
{
	/* return true if protocol supports memory accounting */
	return !!sk->sk_prot->memory_allocated;
}

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static inline bool sk_wmem_schedule(struct sock *sk, int size)
{
	if (!sk_has_account(sk))
		return true;
	return size <= sk->sk_forward_alloc ||
		__sk_mem_schedule(sk, size, SK_MEM_SEND);
}

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eric dumazet
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static inline bool

sk_rmem_schedule(struct sock *sk, struct sk_buff *skb, int size)
{
	if (!sk_has_account(sk))
		return true;
	return size<= sk->sk_forward_alloc ||
		__sk_mem_schedule(sk, size, SK_MEM_RECV) ||
		skb_pfmemalloc(skb);
}

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herbert xu
herbert xu
27
51.92%
1
25.00%
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13
25.00%
1
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mel gorman
mel gorman
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eric dumazet
2
3.85%
1
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52
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4
100.00%



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, sk->sk_forward_alloc);
}

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38
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100.00%



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, sk->sk_forward_alloc - 1);
}

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15.00%
1
50.00%
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40
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2
100.00%



static inline void sk_mem_charge(struct sock *sk, int size)
{
	if (!sk_has_account(sk))
		return;
	sk->sk_forward_alloc -= size;
}

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static inline void sk_mem_uncharge(struct sock *sk, int size)
{
	if (!sk_has_account(sk))
		return;
	sk->sk_forward_alloc += size;
}

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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);
}

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static inline void sock_release_ownership(struct sock *sk)
{
	if (sk->sk_lock.owned) {
		sk->sk_lock.owned = 0;

		/* The sk_lock has mutex_unlock() semantics: */
		mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
	}
}

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hannes frederic sowa
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55.56%
1
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eric dumazet
20
44.44%
1
50.00%
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45
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/*
 * 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)

#ifdef CONFIG_LOCKDEP


static inline bool lockdep_sock_is_held(const struct sock *csk)
{
	struct sock *sk = (struct sock *)csk;

	return lockdep_is_held(&sk->sk_lock) ||
	       lockdep_is_held(&sk->sk_lock.slock);
}
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#endif

void lock_sock_nested(struct sock *sk, int subclass);



static inline void lock_sock(struct sock *sk)
{
	lock_sock_nested(sk, 0);
}

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peter zijlstra
peter zijlstra
19
100.00%
1
100.00%
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19
100.00%
1
100.00%

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))

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);
}

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eric dumazet
eric dumazet
35
100.00%
2
100.00%
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35
100.00%
2
100.00%

/* 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.
 */



static inline void sock_owned_by_me(const struct sock *sk)
{
#ifdef CONFIG_LOCKDEP
	WARN_ON_ONCE(!lockdep_sock_is_held(sk) && debug_locks);
#endif
}

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hannes frederic sowa
hannes frederic sowa
23
79.31%
1
33.33%
eric dumazet
eric dumazet
6
20.69%
2
66.67%
Total
29
100.00%
3
100.00%



static inline bool sock_owned_by_user(const struct sock *sk)
{
	sock_owned_by_me(sk);
	return sk->sk_lock.owned;
}

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eric dumazet
eric dumazet
17
68.00%
1
50.00%
hannes frederic sowa
hannes frederic sowa
8
32.00%
1
50.00%
Total
25
100.00%
2
100.00%

/* no reclassification while locks are held */


static inline bool sock_allow_reclassification(const struct sock *csk)
{
	struct sock *sk = (struct sock *)csk;

	return !sk->sk_lock.owned && !spin_is_locked(&sk->sk_lock.slock);
}

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hannes frederic sowa
hannes frederic sowa
44
100.00%
1
100.00%
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44
100.00%
1
100.00%

struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
		      struct proto *prot, int kern);
void sk_free(struct sock *sk);
void sk_destruct(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);
void __sock_wfree(struct sk_buff *skb);
void sock_wfree(struct sk_buff *skb);
void skb_orphan_partial(struct sk_buff *skb);
void sock_rfree(struct sk_buff *skb);
void sock_efree(struct sk_buff *skb);
#ifdef CONFIG_INET
void sock_edemux(struct sk_buff *skb);
#else

#define sock_edemux(skb) sock_efree(skb)
#endif

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 sock_kzfree_s(struct sock *sk, void *mem, int size);
void sk_send_sigurg(struct sock *sk);


struct sockcm_cookie {
	
u32 mark;
	
u16 tsflags;
};

int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
		     struct sockcm_cookie *sockc);
int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
		   struct sockcm_cookie *sockc);

/*
 * Functions to fill in entries in struct proto_ops when a protocol
 * does not implement a particular function.
 */
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 socket *, struct msghdr *, size_t);
int sock_no_recvmsg(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.
 */
int sock_common_getsockopt(struct socket *sock, int level, int optname,
				  char __user *optval, int __user *optlen);
int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
			int flags);
int sock_common_setsockopt(struct socket *sock, int level, int optname,
				  char __user *optval, unsigned int optlen);
int compat_sock_common_getsockopt(struct socket *sock, int level,
		int optname, char __user *optval, int __user *optlen);
int compat_sock_common_setsockopt(struct socket *sock, int level,
		int optname, char __user *optval, unsigned int optlen);

void sk_common_release(struct sock *sk);

/*
 *      Default socket callbacks and setup code
 */

/* Initialise core socket variables */
void sock_init_data(struct socket *sock, struct sock *sk);

/*
 * 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);
}
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pre-git
pre-git
26
96.30%
2
66.67%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
3.70%
1
33.33%
Total
27
100.00%
3
100.00%

/* Generic version of sock_put(), dealing with all sockets
 * (TCP_TIMEWAIT, TCP_NEW_SYN_RECV, ESTABLISHED...)
 */
void sock_gen_put(struct sock *sk);

int __sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested,
		     unsigned int trim_cap);


static inline int sk_receive_skb(struct sock *sk, struct sk_buff *skb,
				 const int nested)
{
	return __sk_receive_skb(sk, skb, nested, 1);
}

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willem de bruijn
willem de bruijn
33
100.00%
1
100.00%
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33
100.00%
1
100.00%



static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)
{
	sk->sk_tx_queue_mapping = tx_queue;
}

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krishna kumar
krishna kumar
21
100.00%
1
100.00%
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21
100.00%
1
100.00%



static inline void sk_tx_queue_clear(struct sock *sk)
{
	sk->sk_tx_queue_mapping = -1;
}

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krishna kumar
krishna kumar
19
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1
100.00%
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19
100.00%
1
100.00%



static inline int sk_tx_queue_get(const struct sock *sk)
{
	return sk ? sk->sk_tx_queue_mapping : -1;
}

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krishna kumar
krishna kumar
19
82.61%
1
50.00%
tom herbert
tom herbert
4
17.39%
1
50.00%
Total
23
100.00%
2
100.00%



static inline void sk_set_socket(struct sock *sk, struct socket *sock)
{
	sk_tx_queue_clear(sk);
	sk->sk_socket = sock;
}

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david s. miller
david s. miller
23
82.14%
1
50.00%
krishna kumar
krishna kumar
5
17.86%
1
50.00%
Total
28
100.00%
2
100.00%



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;
}
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eric dumazet
eric dumazet
37
100.00%
3
100.00%
Total
37
100.00%
3
100.00%

/* 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);
}

Contributors
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pre-git
pre-git
36
75.00%
3
37.50%
arnaldo carvalho de melo
arnaldo carvalho de melo
5
10.42%
2
25.00%
david s. miller
david s. miller
4
8.33%
1
12.50%
james morris
james morris
2
4.17%
1
12.50%
eric dumazet
eric dumazet
1
2.08%
1
12.50%
Total
48
100.00%
8
100.00%



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);
}

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pre-git
pre-git
45
73.77%
3
37.50%
venkat yekkirala
venkat yekkirala
7
11.48%
1
12.50%
david s. miller
david s. miller
4
6.56%
1
12.50%
eric dumazet
eric dumazet
3
4.92%
2
25.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
2
3.28%
1
12.50%
Total
61
100.00%
8
100.00%

kuid_t sock_i_uid(struct sock *sk);
unsigned long sock_i_ino(struct sock *sk);



static inline u32 net_tx_rndhash(void)
{
	u32 v = prandom_u32();

	return v ?: 1;
}

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eric dumazet
eric dumazet
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static inline void sk_set_txhash(struct sock *sk)
{
	sk->sk_txhash = net_tx_rndhash();
}

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tom herbert
tom herbert
18
94.74%
1
50.00%
eric dumazet
eric dumazet
1
5.26%
1
50.00%
Total
19
100.00%
2
100.00%



static inline void sk_rethink_txhash(struct sock *sk)
{
	if (sk->sk_txhash)
		sk_set_txhash(sk);
}

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tom herbert
tom herbert
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%


static inline struct dst_entry *

__sk_dst_get(struct sock *sk)
{
	return rcu_dereference_check(sk->sk_dst_cache,
				     lockdep_sock_is_held(sk));
}

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pre-git
pre-git
18
66.67%
2
40.00%
eric dumazet
eric dumazet
7
25.93%
1
20.00%
hannes frederic sowa
hannes frederic sowa
1
3.70%
1
20.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
3.70%
1
20.00%
Total
27
100.00%
5
100.00%


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 && !atomic_inc_not_zero(&dst->__refcnt))
		dst = NULL;
	rcu_read_unlock();
	return dst;
}

Contributors
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pre-git
pre-git
31
57.41%
2
40.00%
eric dumazet
eric dumazet
22
40.74%
2
40.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
1.85%
1
20.00%
Total
54
100.00%
5
100.00%



static inline void dst_negative_advice(struct sock *sk)
{
	struct dst_entry *ndst, *dst = __sk_dst_get(sk);

	sk_rethink_txhash(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_tx_queue_clear(sk);
		}
	}
}

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eric dumazet
eric dumazet
62
82.67%
1
25.00%
pre-git
pre-git
7
9.33%
1
25.00%
tom herbert
tom herbert
5
6.67%
1
25.00%
zhao gang
zhao gang
1
1.33%
1
25.00%
Total
75
100.00%
4
100.00%


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);
}

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pre-git
pre-git
36
70.59%
2
33.33%
eric dumazet
eric dumazet
8
15.69%
2
33.33%
krishna kumar
krishna kumar
5
9.80%
1
16.67%
arnaldo carvalho de melo
arnaldo carvalho de melo
2
3.92%
1
16.67%
Total
51
100.00%
6
100.00%


static inline void

sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
	struct dst_entry *old_dst;

	sk_tx_queue_clear(sk);
	old_dst = xchg((__force struct dst_entry **)&sk->sk_dst_cache, dst);
	dst_release(old_dst);
}

Contributors
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pre-git
pre-git
30
58.82%
2
50.00%
eric dumazet
eric dumazet
21
41.18%
2
50.00%
Total
51
100.00%
4
100.00%


static inline void

__sk_dst_reset(struct sock *sk)
{
	__sk_dst_set(sk, NULL);
}

Contributors
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pre-git
pre-git
15
78.95%
2
50.00%
eric dumazet
eric dumazet
2
10.53%
1
25.00%
krishna kumar
krishna kumar
2
10.53%
1
25.00%
Total
19
100.00%
4
100.00%


static inline void

sk_dst_reset(struct sock *sk)
{
	sk_dst_set(sk, NULL);
}

Contributors
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pre-git
pre-git
16
84.21%
2
66.67%
eric dumazet
eric dumazet
3
15.79%
1
33.33%
Total
19
100.00%
3
100.00%

struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);

struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);

bool sk_mc_loop(struct sock *sk);



static inline bool sk_can_gso(const struct sock *sk)
{
	return net_gso_ok(sk->sk_route_caps, sk->sk_gso_type);
}

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herbert xu
herbert xu
24
96.00%
1
50.00%
eric dumazet
eric dumazet
1
4.00%
1
50.00%
Total
25
100.00%
2
100.00%

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;
}

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eric dumazet
eric dumazet
27
96.43%
1
50.00%
michal miroslaw
michal miroslaw
1
3.57%
1
50.00%
Total
28
100.00%
2
100.00%



static inline bool sk_check_csum_caps(struct sock *sk)
{
	return (sk->sk_route_caps & NETIF_F_HW_CSUM) ||
	       (sk->sk_family == PF_INET &&
		(sk->sk_route_caps & NETIF_F_IP_CSUM)) ||
	       (sk->sk_family == PF_INET6 &&
		(sk->sk_route_caps & NETIF_F_IPV6_CSUM));
}

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tom herbert
tom herbert
53
100.00%
1
100.00%
Total
53
100.00%
1
100.00%



static inline int skb_do_copy_data_nocache(struct sock *sk, struct sk_buff *skb,
					   struct iov_iter *from, char *to,
					   int copy, int offset)
{
	if (skb->ip_summed == CHECKSUM_NONE) {
		__wsum csum = 0;
		if (csum_and_copy_from_iter(to, copy, &csum, from) != copy)
			return -EFAULT;
		skb->csum = csum_block_add(skb->csum, csum, offset);
	} else if (sk->sk_route_caps & NETIF_F_NOCACHE_COPY) {
		if (copy_from_iter_nocache(to, copy, from) != copy)
			return -EFAULT;
	} else if (copy_from_iter(to, copy, from) != copy)
		return -EFAULT;

	return 0;
}

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tom herbert
tom herbert
104
79.39%
1
33.33%
al viro
al viro
23
17.56%
1
33.33%
wei yongjun
wei yongjun
4
3.05%
1
33.33%
Total
131
100.00%
3
100.00%



static inline int skb_add_data_nocache(struct sock *sk, struct sk_buff *skb,
				       struct iov_iter *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;
}

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tom herbert
tom herbert
59
84.29%
1
33.33%
wei yongjun
wei yongjun
9
12.86%
1
33.33%
al viro
al viro
2
2.86%
1
33.33%
Total
70
100.00%
3
100.00%



static inline int skb_copy_to_page_nocache(struct sock *sk, struct iov_iter *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;
}

Contributors
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tom herbert
tom herbert
95
94.06%
1
33.33%
wei yongjun
wei yongjun
4
3.96%
1
33.33%
al viro
al viro
2
1.98%
1
33.33%
Total
101
100.00%
3
100.00%

/**
 * 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;
}

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eric dumazet
eric dumazet
24
100.00%
1
100.00%
Total
24
100.00%
1
100.00%

/**
 * 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);
}

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eric dumazet
eric dumazet
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%

/**
 * sk_has_allocations - check if allocations are outstanding
 * @sk: socket
 *
 * Returns true if socket has write or read allocations
 */


static inline bool sk_has_allocations(const struct sock *sk)
{
	return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
}

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eric dumazet
eric dumazet
24
100.00%
2
100.00%
Total
24
100.00%
2
100.00%

/**
 * skwq_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 skwq_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 skwq_has_sleeper(struct socket_wq *wq)
{
	return wq && wq_has_sleeper(&wq->wait);
}

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jiri olsa
jiri olsa
13
56.52%
1
33.33%
eric dumazet
eric dumazet
8
34.78%
1
33.33%
herbert xu
herbert xu
2
8.70%
1
33.33%
Total
23
100.00%
3
100.00%

/**
 * 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();
	}
}

Contributors
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jiri olsa
jiri olsa
40
88.89%
1
33.33%
hans verkuil
hans verkuil
4
8.89%
1
33.33%
eric dumazet
eric dumazet
1
2.22%
1
33.33%
Total
45
100.00%
3
100.00%



static inline void skb_set_hash_from_sk(struct sk_buff *skb, struct sock *sk)
{
	if (sk->sk_txhash) {
		skb->l4_hash = 1;
		skb->hash = sk->sk_txhash;
	}
}

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tom herbert
tom herbert
39
100.00%
1
100.00%
Total
39
100.00%
1
100.00%

void skb_set_owner_w(struct sk_buff *skb, struct sock *sk);

/*
 *      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_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);
}

Contributors
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pre-git
pre-git
40
72.73%
3
50.00%
hideo aoki
hideo aoki
9
16.36%
1
16.67%
herbert xu
herbert xu
5
9.09%
1
16.67%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
1.82%
1
16.67%
Total
55
100.00%
6
100.00%

void sk_reset_timer(struct sock *sk, struct timer_list *timer,
		    unsigned long expires);

void sk_stop_timer(struct sock *sk, struct timer_list *timer);

int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);

int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
struct sk_buff *sock_dequeue_err_skb(struct sock *sk);

/*
 *      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;
}

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pre-git
pre-git
26
59.09%
2
50.00%
benjamin lahaise
benjamin lahaise
17
38.64%
1
25.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
2.27%
1
25.00%
Total
44
100.00%
4
100.00%



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;
}

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pre-git
pre-git
55
94.83%
2
66.67%
arnaldo carvalho de melo
arnaldo carvalho de melo
3
5.17%
1
33.33%
Total
58
100.00%
3
100.00%

/* Note:
 *  We use sk->sk_wq_raw, from contexts knowing this
 *  pointer is not NULL and cannot disappear/change.
 */


static inline void sk_set_bit(int nr, struct sock *sk)
{
	if ((nr == SOCKWQ_ASYNC_NOSPACE || nr == SOCKWQ_ASYNC_WAITDATA) &&
	    !sock_flag(sk, SOCK_FASYNC))
		return;

	set_bit(nr, &sk->sk_wq_raw->flags);
}

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eric dumazet
eric dumazet
48
100.00%
4
100.00%
Total
48
100.00%
4
100.00%



static inline void sk_clear_bit(int nr, struct sock *sk)
{
	if ((nr == SOCKWQ_ASYNC_NOSPACE || nr == SOCKWQ_ASYNC_WAITDATA) &&
	    !sock_flag(sk, SOCK_FASYNC))
		return;

	clear_bit(nr, &sk->sk_wq_raw->flags);
}

Contributors
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eric dumazet
eric dumazet
48
100.00%
4
100.00%
Total
48
100.00%
4
100.00%



static inline void sk_wake_async(const struct sock *sk, int how, int band)
{
	if (sock_flag(sk, SOCK_FASYNC)) {
		rcu_read_lock();
		sock_wake_async(rcu_dereference(sk->sk_wq), how, band);
		rcu_read_unlock();
	}
}

Contributors
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pre-git
pre-git
32
64.00%
2
50.00%
eric dumazet
eric dumazet
18
36.00%
2
50.00%
Total
50
100.00%
4
100.00%

/* Since sk_{r,w}mem_alloc sums skb->truesize, even a small frame might
 * need sizeof(sk_buff) + MTU + padding, unless net driver perform copybreak.
 * Note: for send buffers, TCP works better if we can build two skbs at
 * minimum.
 */

#define TCP_SKB_MIN_TRUESIZE	(2048 + SKB_DATA_ALIGN(sizeof(struct sk_buff)))


#define SOCK_MIN_SNDBUF		(TCP_SKB_MIN_TRUESIZE * 2)

#define SOCK_MIN_RCVBUF		 TCP_SKB_MIN_TRUESIZE



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_t(u32, sk->sk_sndbuf, SOCK_MIN_SNDBUF);
	}
}

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arnaldo carvalho de melo
arnaldo carvalho de melo
52
91.23%
1
33.33%
daniel borkmann
daniel borkmann
3
5.26%
1
33.33%
eric dumazet
eric dumazet
2
3.51%
1
33.33%
Total
57
100.00%
3
100.00%

struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp,
				    bool force_schedule);

/**
 * sk_page_frag - return an appropriate page_frag
 * @sk: socket
 *
 * If socket allocation mode allows current thread to sleep, it means its
 * safe to use the per task page_frag instead of the per socket one.
 */


static inline struct page_frag *sk_page_frag(struct sock *sk)
{
	if (gfpflags_allow_blocking(sk->sk_allocation))
		return &current->task_frag;

	return &sk->sk_frag;
}

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arnaldo carvalho de melo
arnaldo carvalho de melo
17
48.57%
1
25.00%
eric dumazet
eric dumazet
14
40.00%
1
25.00%
mel gorman
mel gorman
3
8.57%
1
25.00%
herbert xu
herbert xu
1
2.86%
1
25.00%
Total
35
100.00%
4
100.00%

bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);

/*
 *      Default write policy as shown to user space via poll/select/SIGIO
 */


static inline bool sock_writeable(const struct sock *sk)
{
	return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
}

Contributors
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pre-git
pre-git
16
53.33%
2
28.57%
david s. miller
david s. miller
8
26.67%
1
14.29%
eric dumazet
eric dumazet
3
10.00%
2
28.57%
arnaldo carvalho de melo
arnaldo carvalho de melo
2
6.67%
1
14.29%
stephen hemminger
stephen hemminger
1
3.33%
1
14.29%
Total
30
100.00%
7
100.00%



static inline gfp_t gfp_any(void)
{
	return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}

Contributors
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pre-git
pre-git
15
88.24%
2
50.00%
al viro
al viro
1
5.88%
1
25.00%
andrew morton
andrew morton
1
5.88%
1
25.00%
Total
17
100.00%
4
100.00%



static inline long sock_rcvtimeo(const struct sock *sk, bool noblock)
{
	return noblock ? 0 : sk->sk_rcvtimeo;
}

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pre-git
pre-git
22
88.00%
2
40.00%
eric dumazet
eric dumazet
1
4.00%
1
20.00%
stephen hemminger
stephen hemminger
1
4.00%
1
20.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
4.00%
1
20.00%
Total
25
100.00%
5
100.00%



static inline long sock_sndtimeo(const struct sock *sk, bool noblock)
{
	return noblock ? 0 : sk->sk_sndtimeo;
}

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pre-git
pre-git
22
88.00%
2
40.00%
eric dumazet
eric dumazet
1
4.00%
1
20.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
4.00%
1
20.00%
stephen hemminger
stephen hemminger
1
4.00%
1
20.00%
Total
25
100.00%
5
100.00%



static inline int sock_rcvlowat(const struct sock *sk, int waitall, int len)
{
	return (waitall ? len : min_t(int, sk->sk_rcvlowat, len)) ? : 1;
}

Contributors
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pre-git
pre-git
35
87.50%
3
42.86%
linus torvalds
linus torvalds
3
7.50%
2
28.57%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
2.50%
1
14.29%
stephen hemminger
stephen hemminger
1
2.50%
1
14.29%
Total
40
100.00%
7
100.00%

/* 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;
}

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pre-git
pre-git
21
100.00%
2
100.00%
Total
21
100.00%
2
100.00%


struct sock_skb_cb {
	
u32 dropcount;
};

/* Store sock_skb_cb at the end of skb->cb[] so protocol families
 * using skb->cb[] would keep using it directly and utilize its
 * alignement guarantee.
 */

#define SOCK_SKB_CB_OFFSET ((FIELD_SIZEOF(struct sk_buff, cb) - \
                            sizeof(struct sock_skb_cb)))


#define SOCK_SKB_CB(__skb) ((struct sock_skb_cb *)((__skb)->cb + \
                            SOCK_SKB_CB_OFFSET))


#define sock_skb_cb_check_size(size) \
	BUILD_BUG_ON((size) > SOCK_SKB_CB_OFFSET)


static inline void

sock_skb_set_dropcount(const struct sock *sk, struct sk_buff *skb)
{
	SOCK_SKB_CB(skb)->dropcount = atomic_read(&sk->sk_drops);
}

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eyal birger
eyal birger
33
100.00%
2
100.00%
Total
33
100.00%
2
100.00%



static inline void sk_drops_add(struct sock *sk, const struct sk_buff *skb)
{
	int segs = max_t(u16, 1, skb_shinfo(skb)->gso_segs);

	atomic_add(segs, &sk->sk_drops);
}

Contributors
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eric dumazet
eric dumazet
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%

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)
{
	ktime_t kt = skb->tstamp;
	struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);

	/*
         * generate control messages if
         * - receive time stamping in software requested
         * - software time stamp available and wanted
         * - hardware time stamps available and wanted
         */
	if (sock_flag(sk, SOCK_RCVTSTAMP) ||
	    (sk->sk_tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) ||
	    (kt.tv64 && sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) ||
	    (hwtstamps->hwtstamp.tv64 &&
	     (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_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);
}

Contributors
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CommitProp
pre-git
pre-git
34
27.64%
1
10.00%
patrick ohly
patrick ohly
30
24.39%
1
10.00%
johannes berg
johannes berg
22
17.89%
1
10.00%
willem de bruijn
willem de bruijn
17
13.82%
1
10.00%
eric dumazet
eric dumazet
11
8.94%
3
30.00%
thomas graf
thomas graf
5
4.07%
1
10.00%
andi kleen
andi kleen
3
2.44%
1
10.00%
arnaldo carvalho de melo
arnaldo carvalho de melo
1
0.81%
1
10.00%
Total
123
100.00%
10
100.00%

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))

#define TSFLAGS_ANY	  (SOF_TIMESTAMPING_SOFTWARE                      | \
                           SOF_TIMESTAMPING_RAW_HARDWARE)

	if (sk->sk_flags & FLAGS_TS_OR_DROPS || sk->sk_tsflags & TSFLAGS_ANY)
		__sock_recv_ts_and_drops(msg, sk, skb);
	else
		sk->sk_stamp = skb->tstamp;
}

Contributors
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Tokens
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CommitProp
eric dumazet
eric dumazet
51
82.26%
1
50.00%
willem de bruijn
willem de bruijn
11
17.74%
1
50.00%
Total
62
100.00%
2
100.00%

void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags);

/**
 * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
 * @sk:         socket sending this packet
 * @tsflags:    timestamping flags to use
 * @tx_flags:   completed with instructions for time stamping
 *
 * Note : callers should take care of initial *tx_flags value (usually 0)
 */


static inline void sock_tx_timestamp(const struct sock *sk, __u16 tsflags,
				     __u8 *tx_flags)
{
	if (unlikely(tsflags))
		__sock_tx_timestamp(tsflags, tx_flags);
	if (unlikely(sock_flag(sk, SOCK_WIFI_STATUS)))
		*tx_flags |= SKBTX_WIFI_STATUS;
}

Contributors
Person
Tokens
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CommitProp
willem de bruijn
willem de bruijn
33
64.71%
1
16.67%
patrick ohly
patrick ohly
9
17.65%
1
16.67%
soheil hassas yeganeh
soheil hassas yeganeh
5
9.80%
1
16.67%
oliver hartkopp
oliver hartkopp
2
3.92%
1
16.67%
eric dumazet
eric dumazet
1
1.96%
1
16.67%
daniel borkmann
daniel borkmann
1
1.96%
1
16.67%
Total
51
100.00%
6
100.00%

/**
 * sk_eat_skb - Release a skb if it is no longer needed
 * @sk: socket to eat this skb from
 * @skb: socket buffer to eat
 *
 * This routine must be called with interrupts disabled or with the socket
 * locked so that the sk_buff queue operation is ok.
*/


static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb)
{
	__skb_unlink(skb, &sk->sk_receive_queue);
	__kfree_skb(skb);
}

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arnaldo carvalho de melo
arnaldo carvalho de melo
32
100.00%
1
100.00%
Total
32
100.00%
1
100.00%


static inline

struct net *sock_net(const struct sock *sk)
{
	return read_pnet(&sk->sk_net);
}

Contributors
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hideaki yoshifuji
hideaki yoshifuji
20
83.33%
1
50.00%
eric dumazet
eric dumazet
4
16.67%
1
50.00%
Total
24
100.00%
2
100.00%


static inline

void sock_net_set(struct sock *sk, struct net *net)
{
	write_pnet(&sk->sk_net, net);
}

Contributors
Person
Tokens
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Commits
CommitProp
hideaki yoshifuji
hideaki yoshifuji
22
81.48%
1
50.00%
eric dumazet
eric dumazet
5
18.52%
1
50.00%
Total
27
100.00%
2
100.00%



static inline struct sock *skb_steal_sock(struct sk_buff *skb)
{
	if (skb->sk) {
		struct sock *sk = skb->sk;

		skb->destructor = NULL;
		skb->sk = NULL;
		return sk;
	}
	return NULL;
}

Contributors
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kovacs krisztian
kovacs krisztian
48
97.96%
1
50.00%
denis v. lunev
denis v. lunev
1
2.04%
1
50.00%
Total
49
100.00%
2
100.00%

/* This helper checks if a socket is a full socket,
 * ie _not_ a timewait or request socket.
 */


static inline bool sk_fullsock(const struct sock *sk)
{
	return (1 << sk->sk_state) & ~(TCPF_TIME_WAIT | TCPF_NEW_SYN_RECV);
}

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eric dumazet
eric dumazet
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%

/* This helper checks if a socket is a LISTEN or NEW_SYN_RECV
 * SYNACK messages can be attached to either ones (depending on SYNCOOKIE)
 */


static inline bool sk_listener(const struct sock *sk)
{
	return (1 << sk->sk_state) & (TCPF_LISTEN | TCPF_NEW_SYN_RECV);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
eric dumazet
eric dumazet
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%

/**
 * sk_state_load - read sk->sk_state for lockless contexts
 * @sk: socket pointer
 *
 * Paired with sk_state_store(). Used in places we do not hold socket lock :
 * tcp_diag_get_info(), tcp_get_info(), tcp_poll(), get_tcp4_sock() ...
 */


static inline int sk_state_load(const struct sock *sk)
{
	return smp_load_acquire(&sk->sk_state);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
eric dumazet
eric dumazet
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%

/**
 * sk_state_store - update sk->sk_state
 * @sk: socket pointer
 * @newstate: new state
 *
 * Paired with sk_state_load(). Should be used in contexts where
 * state change might impact lockless readers.
 */


static inline void sk_state_store(struct sock *sk, int newstate)
{
	smp_store_release(&sk->sk_state, newstate);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
eric dumazet
eric dumazet
25
100.00%
1
100.00%
Total
25
100.00%
1
100.00%

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);

bool sk_ns_capable(const struct sock *sk,
		   struct user_namespace *user_ns, int cap);
bool sk_capable(const struct sock *sk, int cap);
bool sk_net_capable(const struct sock *sk, int cap);

extern __u32 sysctl_wmem_max;
extern __u32 sysctl_rmem_max;

extern int sysctl_tstamp_allow_data;
extern int sysctl_optmem_max;

extern __u32 sysctl_wmem_default;
extern __u32 sysctl_rmem_default;

#endif	/* _SOCK_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
eric dumazet
eric dumazet
1948
22.40%
97
24.25%
pre-git
pre-git
1606
18.47%
55
13.75%
arnaldo carvalho de melo
arnaldo carvalho de melo
1435
16.50%
41
10.25%
tom herbert
tom herbert
481
5.53%
11
2.75%
glauber costa
glauber costa
367
4.22%
4
1.00%
hideo aoki
hideo aoki
214
2.46%
1
0.25%
willem de bruijn
willem de bruijn
207
2.38%
8
2.00%
david s. miller
david s. miller
188
2.16%
11
2.75%
hannes frederic sowa
hannes frederic sowa
160
1.84%
6
1.50%
pavel emelianov
pavel emelianov
137
1.58%
10
2.50%
mel gorman
mel gorman
130
1.49%
6
1.50%
stephen hemminger
stephen hemminger
126
1.45%
5
1.25%
eric w. biederman
eric w. biederman
125
1.44%
10
2.50%
dmitry mishin
dmitry mishin
102
1.17%
1
0.25%
herbert xu
herbert xu
93
1.07%
7
1.75%
krishna kumar
krishna kumar
76
0.87%
1
0.25%
craig gallek
craig gallek
75
0.86%
5
1.25%
christoph hellwig
christoph hellwig
69
0.79%
1
0.25%
peter zijlstra
peter zijlstra
64
0.74%
4
1.00%
eyal birger
eyal birger
61
0.70%
3
0.75%
jiri olsa
jiri olsa
56
0.64%
1
0.25%
kovacs krisztian
kovacs krisztian
48
0.55%
1
0.25%
yi zhu
yi zhu
47
0.54%
2
0.50%
patrick ohly
patrick ohly
45
0.52%
1
0.25%
johannes berg
johannes berg
44
0.51%
1
0.25%
al viro
al viro
43
0.49%
6
1.50%
hideaki yoshifuji
hideaki yoshifuji
42
0.48%
1
0.25%
thomas graf
thomas graf
39
0.45%
7
1.75%
andrew morton
andrew morton
36
0.41%
3
0.75%
linus torvalds
linus torvalds
34
0.39%
7
1.75%
alexey kuznetsov
alexey kuznetsov
33
0.38%
2
0.50%
johannes weiner
johannes weiner
30
0.34%
5
1.25%
edward hyunkoo jee
edward hyunkoo jee
27
0.31%
1
0.25%
octavian purdila
octavian purdila
27
0.31%
1
0.25%
andi kleen
andi kleen
27
0.31%
2
0.50%
samanthakumar
samanthakumar
26
0.30%
2
0.50%
li zefan
li zefan
26
0.30%
1
0.25%
ralf baechle
ralf baechle
25
0.29%
1
0.25%
daniel borkmann
daniel borkmann
24
0.28%
3
0.75%
richard cochran
richard cochran
23
0.26%
1
0.25%
pravin b shelar
pravin b shelar
23
0.26%
1
0.25%
ingo molnar
ingo molnar
22
0.25%
3
0.75%
neil horman
neil horman
21
0.24%
2
0.50%
alexander duyck
alexander duyck
18
0.21%
2
0.50%
wei yongjun
wei yongjun
17
0.20%
1
0.25%
benjamin lahaise
benjamin lahaise
17
0.20%
1
0.25%
alexey dobriyan
alexey dobriyan
16
0.18%
4
1.00%
lorenzo colitti
lorenzo colitti
15
0.17%
1
0.25%
james morris
james morris
15
0.17%
3
0.75%
harvey harrison
harvey harrison
15
0.17%
1
0.25%
david held
david held
12
0.14%
1
0.25%
eliezer tamir
eliezer tamir
12
0.14%
2
0.50%
soheil hassas yeganeh
soheil hassas yeganeh
11
0.13%
2
0.50%
tejun heo
tejun heo
10
0.11%
3
0.75%
venkat yekkirala
venkat yekkirala
7
0.08%
1
0.25%
denys vlasenko
denys vlasenko
6
0.07%
2
0.50%
sabrina dubroca
sabrina dubroca
6
0.07%
1
0.25%
andrey ryabinin
andrey ryabinin
5
0.06%
1
0.25%
zhi yong wu
zhi yong wu
5
0.06%
1
0.25%
sasha levin
sasha levin
5
0.06%
1
0.25%
shirley ma
shirley ma
5
0.06%
1
0.25%
randy dunlap
randy dunlap
4
0.05%
1
0.25%
joe perches
joe perches
4
0.05%
1
0.25%
hans verkuil
hans verkuil
4
0.05%
1
0.25%
akinobu mita
akinobu mita
4
0.05%
1
0.25%
denis v. lunev
denis v. lunev
4
0.05%
2
0.50%
peter p waskiewicz
peter p waskiewicz
4
0.05%
1
0.25%
marcelo ricardo leitner
marcelo ricardo leitner
4
0.05%
1
0.25%
ilpo jarvinen
ilpo jarvinen
3
0.03%
1
0.25%
ben hutchings
ben hutchings
3
0.03%
1
0.25%
michal miroslaw
michal miroslaw
3
0.03%
1
0.25%
vincent bernat
vincent bernat
3
0.03%
1
0.25%
ben greear
ben greear
3
0.03%
1
0.25%
jacob e keller
jacob e keller
3
0.03%
1
0.25%
paul gortmaker
paul gortmaker
3
0.03%
1
0.25%
changli gao
changli gao
3
0.03%
1
0.25%
john heffner
john heffner
2
0.02%
1
0.25%
christoph lameter
christoph lameter
2
0.02%
1
0.25%
americo wang
americo wang
2
0.02%
2
0.50%
oliver hartkopp
oliver hartkopp
2
0.02%
1
0.25%
jesper juhl
jesper juhl
1
0.01%
1
0.25%
dan williams
dan williams
1
0.01%
1
0.25%
zhao gang
zhao gang
1
0.01%
1
0.25%
brian haley
brian haley
1
0.01%
1
0.25%
ying xue
ying xue
1
0.01%
1
0.25%
zhaowei yuan
zhaowei yuan
1
0.01%
1
0.25%
christoph paasch
christoph paasch
1
0.01%
1
0.25%
chris leech
chris leech
1
0.01%
1
0.25%
Total
8697
100.00%
400
100.00%
  
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