#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>
#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/rbtree.h>
#include <linux/rculist_nulls.h>
#include <linux/poll.h>
#include <linux/sockptr.h>
#include <linux/indirect_call_wrapper.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
#include <linux/llist.h>
#include <net/dst.h>
#include <net/checksum.h>
#include <net/tcp_states.h>
#include <linux/net_tstamp.h>
#include <net/l3mdev.h>
#include <uapi/linux/socket.h>
typedef struct {
spinlock_t slock;
int owned;
wait_queue_head_t wq;
#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 {
union {
__addrpair skc_addrpair;
struct {
__be32 skc_daddr;
__be32 skc_rcv_saddr;
};
};
union {
unsigned int skc_hash;
__u16 skc_u16hashes[2];
};
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;
unsigned char skc_bypass_prot_mem: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;
union {
unsigned long skc_flags;
struct sock *skc_listener;
struct inet_timewait_death_row *skc_tw_dr;
};
int skc_dontcopy_begin[0];
union {
struct hlist_node skc_node;
struct hlist_nulls_node skc_nulls_node;
};
unsigned short skc_tx_queue_mapping;
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
unsigned short skc_rx_queue_mapping;
#endif
union {
int skc_incoming_cpu;
u32 skc_rcv_wnd;
u32 skc_tw_rcv_nxt;
};
refcount_t skc_refcnt;
int skc_dontcopy_end[0];
union {
u32 skc_rxhash;
u32 skc_window_clamp;
u32 skc_tw_snd_nxt;
};
};
struct bpf_local_storage;
struct sk_filter;
struct sock {
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
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
#define sk_rx_queue_mapping __sk_common.skc_rx_queue_mapping
#endif
#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_bypass_prot_mem __sk_common.skc_bypass_prot_mem
#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
__cacheline_group_begin(sock_write_rx);
atomic_t sk_drops;
__s32 sk_peek_off;
struct sk_buff_head sk_error_queue;
struct sk_buff_head sk_receive_queue;
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
__cacheline_group_end(sock_write_rx);
__cacheline_group_begin(sock_read_rx);
struct dst_entry __rcu *sk_rx_dst;
int sk_rx_dst_ifindex;
u32 sk_rx_dst_cookie;
#ifdef CONFIG_NET_RX_BUSY_POLL
unsigned int sk_ll_usec;
unsigned int sk_napi_id;
u16 sk_busy_poll_budget;
u8 sk_prefer_busy_poll;
#endif
u8 sk_userlocks;
int sk_rcvbuf;
struct sk_filter __rcu *sk_filter;
union {
struct socket_wq __rcu *sk_wq;
struct socket_wq *sk_wq_raw;
};
void (*sk_data_ready)(struct sock *sk);
long sk_rcvtimeo;
int sk_rcvlowat;
__cacheline_group_end(sock_read_rx);
__cacheline_group_begin(sock_read_rxtx);
int sk_err;
struct socket *sk_socket;
#ifdef CONFIG_MEMCG
struct mem_cgroup *sk_memcg;
#endif
#ifdef CONFIG_XFRM
struct xfrm_policy __rcu *sk_policy[2];
#endif
#if IS_ENABLED(CONFIG_INET_PSP)
struct psp_assoc __rcu *psp_assoc;
#endif
__cacheline_group_end(sock_read_rxtx);
__cacheline_group_begin(sock_write_rxtx);
socket_lock_t sk_lock;
u32 sk_reserved_mem;
int sk_forward_alloc;
u32 sk_tsflags;
__cacheline_group_end(sock_write_rxtx);
__cacheline_group_begin(sock_write_tx);
int sk_write_pending;
atomic_t sk_omem_alloc;
int sk_err_soft;
int sk_wmem_queued;
refcount_t sk_wmem_alloc;
unsigned long sk_tsq_flags;
union {
struct sk_buff *sk_send_head;
struct rb_root tcp_rtx_queue;
};
struct sk_buff_head sk_write_queue;
struct page_frag sk_frag;
union {
struct timer_list sk_timer;
struct timer_list tcp_retransmit_timer;
struct timer_list mptcp_retransmit_timer;
};
unsigned long sk_pacing_rate;
atomic_t sk_zckey;
atomic_t sk_tskey;
unsigned long sk_tx_queue_mapping_jiffies;
__cacheline_group_end(sock_write_tx);
__cacheline_group_begin(sock_read_tx);
u32 sk_dst_pending_confirm;
u32 sk_pacing_status;
unsigned long sk_max_pacing_rate;
long sk_sndtimeo;
u32 sk_priority;
u32 sk_mark;
kuid_t sk_uid;
u16 sk_protocol;
u16 sk_type;
struct dst_entry __rcu *sk_dst_cache;
netdev_features_t sk_route_caps;
#ifdef CONFIG_SOCK_VALIDATE_XMIT
struct sk_buff* (*sk_validate_xmit_skb)(struct sock *sk,
struct net_device *dev,
struct sk_buff *skb);
#endif
u16 sk_gso_type;
u16 sk_gso_max_segs;
unsigned int sk_gso_max_size;
gfp_t sk_allocation;
u32 sk_txhash;
int sk_sndbuf;
u8 sk_pacing_shift;
bool sk_use_task_frag;
__cacheline_group_end(sock_read_tx);
u8 sk_gso_disabled : 1,
sk_kern_sock : 1,
sk_no_check_tx : 1,
sk_no_check_rx : 1;
u8 sk_shutdown;
unsigned long sk_lingertime;
struct proto *sk_prot_creator;
rwlock_t sk_callback_lock;
u32 sk_ack_backlog;
u32 sk_max_ack_backlog;
unsigned long sk_ino;
spinlock_t sk_peer_lock;
int sk_bind_phc;
struct pid *sk_peer_pid;
const struct cred *sk_peer_cred;
ktime_t sk_stamp;
#if BITS_PER_LONG==32
seqlock_t sk_stamp_seq;
#endif
int sk_disconnects;
union {
u8 sk_txrehash;
u8 sk_scm_recv_flags;
struct {
u8 sk_scm_credentials : 1,
sk_scm_security : 1,
sk_scm_pidfd : 1,
sk_scm_rights : 1,
sk_scm_unused : 4;
};
};
u8 sk_clockid;
u8 sk_txtime_deadline_mode : 1,
sk_txtime_report_errors : 1,
sk_txtime_unused : 6;
#define SK_BPF_CB_FLAG_TEST(SK, FLAG) ((SK)->sk_bpf_cb_flags & (FLAG))
u8 sk_bpf_cb_flags;
void *sk_user_data;
#ifdef CONFIG_SECURITY
void *sk_security;
#endif
struct sock_cgroup_data sk_cgrp_data;
void (*sk_state_change)(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;
#ifdef CONFIG_BPF_SYSCALL
struct bpf_local_storage __rcu *sk_bpf_storage;
#endif
struct numa_drop_counters *sk_drop_counters;
union {
struct rcu_head sk_rcu;
freeptr_t sk_freeptr;
};
netns_tracker ns_tracker;
struct xarray sk_user_frags;
#if IS_ENABLED(CONFIG_PROVE_LOCKING) && IS_ENABLED(CONFIG_MODULES)
struct module *sk_owner;
#endif
};
struct sock_bh_locked {
struct sock *sock;
local_lock_t bh_lock;
};
enum sk_pacing {
SK_PACING_NONE = 0,
SK_PACING_NEEDED = 1,
SK_PACING_FQ = 2,
};
#define SK_USER_DATA_NOCOPY 1UL
#define SK_USER_DATA_BPF 2UL
#define SK_USER_DATA_PSOCK 4UL
#define SK_USER_DATA_PTRMASK ~(SK_USER_DATA_NOCOPY | SK_USER_DATA_BPF |\
SK_USER_DATA_PSOCK)
static inline bool sk_user_data_is_nocopy(const struct sock *sk)
{
return ((uintptr_t)sk->sk_user_data & SK_USER_DATA_NOCOPY);
}
#define __sk_user_data(sk) ((*((void __rcu **)&(sk)->sk_user_data)))
static inline void *
__locked_read_sk_user_data_with_flags(const struct sock *sk,
uintptr_t flags)
{
uintptr_t sk_user_data =
(uintptr_t)rcu_dereference_check(__sk_user_data(sk),
lockdep_is_held(&sk->sk_callback_lock));
WARN_ON_ONCE(flags & SK_USER_DATA_PTRMASK);
if ((sk_user_data & flags) == flags)
return (void *)(sk_user_data & SK_USER_DATA_PTRMASK);
return NULL;
}
static inline void *
__rcu_dereference_sk_user_data_with_flags(const struct sock *sk,
uintptr_t flags)
{
uintptr_t sk_user_data = (uintptr_t)rcu_dereference(__sk_user_data(sk));
WARN_ON_ONCE(flags & SK_USER_DATA_PTRMASK);
if ((sk_user_data & flags) == flags)
return (void *)(sk_user_data & SK_USER_DATA_PTRMASK);
return NULL;
}
#define rcu_dereference_sk_user_data(sk) \
__rcu_dereference_sk_user_data_with_flags(sk, 0)
#define __rcu_assign_sk_user_data_with_flags(sk, ptr, flags) \
({ \
uintptr_t __tmp1 = (uintptr_t)(ptr), \
__tmp2 = (uintptr_t)(flags); \
WARN_ON_ONCE(__tmp1 & ~SK_USER_DATA_PTRMASK); \
WARN_ON_ONCE(__tmp2 & SK_USER_DATA_PTRMASK); \
rcu_assign_pointer(__sk_user_data((sk)), \
__tmp1 | __tmp2); \
})
#define rcu_assign_sk_user_data(sk, ptr) \
__rcu_assign_sk_user_data_with_flags(sk, ptr, 0)
static inline
struct net *sock_net(const struct sock *sk)
{
return read_pnet(&sk->sk_net);
}
static inline
void sock_net_set(struct sock *sk, struct net *net)
{
write_pnet(&sk->sk_net, net);
}
#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(const struct sock *sk, int flags)
{
if (unlikely(flags & MSG_PEEK)) {
return READ_ONCE(sk->sk_peek_off);
}
return 0;
}
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);
}
}
static inline void sk_peek_offset_fwd(struct sock *sk, int val)
{
sk_peek_offset_bwd(sk, -val);
}
static inline struct sock *sk_entry(const struct hlist_node *node)
{
return hlist_entry(node, struct sock, sk_node);
}
static inline struct sock *__sk_head(const struct hlist_head *head)
{
return hlist_entry(head->first, struct sock, sk_node);
}
static inline struct sock *sk_head(const struct hlist_head *head)
{
return hlist_empty(head) ? NULL : __sk_head(head);
}
static inline struct sock *__sk_nulls_head(const struct hlist_nulls_head *head)
{
return hlist_nulls_entry(head->first, struct sock, sk_nulls_node);
}
static inline struct sock *sk_nulls_head(const struct hlist_nulls_head *head)
{
return hlist_nulls_empty(head) ? NULL : __sk_nulls_head(head);
}
static inline struct sock *sk_next(const struct sock *sk)
{
return hlist_entry_safe(sk->sk_node.next, struct sock, sk_node);
}
static inline struct sock *sk_nulls_next(const struct sock *sk)
{
return (!is_a_nulls(sk->sk_nulls_node.next)) ?
hlist_nulls_entry(sk->sk_nulls_node.next,
struct sock, sk_nulls_node) :
NULL;
}
static inline bool sk_unhashed(const struct sock *sk)
{
return hlist_unhashed(&sk->sk_node);
}
static inline bool sk_hashed(const struct sock *sk)
{
return !sk_unhashed(sk);
}
static inline void sk_node_init(struct hlist_node *node)
{
node->pprev = NULL;
}
static inline void __sk_del_node(struct sock *sk)
{
__hlist_del(&sk->sk_node);
}
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;
}
static __always_inline void sock_hold(struct sock *sk)
{
refcount_inc(&sk->sk_refcnt);
}
static __always_inline void __sock_put(struct sock *sk)
{
refcount_dec(&sk->sk_refcnt);
}
static inline bool sk_del_node_init(struct sock *sk)
{
bool rc = __sk_del_node_init(sk);
if (rc)
__sock_put(sk);
return rc;
}
#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;
}
static inline bool sk_nulls_del_node_init_rcu(struct sock *sk)
{
bool rc = __sk_nulls_del_node_init_rcu(sk);
if (rc)
__sock_put(sk);
return rc;
}
static inline bool sk_nulls_replace_node_init_rcu(struct sock *old,
struct sock *new)
{
if (sk_hashed(old)) {
hlist_nulls_replace_init_rcu(&old->sk_nulls_node,
&new->sk_nulls_node);
__sock_put(old);
return true;
}
return false;
}
static inline void __sk_add_node(struct sock *sk, struct hlist_head *list)
{
hlist_add_head(&sk->sk_node, list);
}
static inline void sk_add_node(struct sock *sk, struct hlist_head *list)
{
sock_hold(sk);
__sk_add_node(sk, list);
}
static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
{
sock_hold(sk);
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);
}
static inline void sk_add_node_tail_rcu(struct sock *sk, struct hlist_head *list)
{
sock_hold(sk);
hlist_add_tail_rcu(&sk->sk_node, list);
}
static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
{
hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
}
static inline void __sk_nulls_add_node_tail_rcu(struct sock *sk, struct hlist_nulls_head *list)
{
hlist_nulls_add_tail_rcu(&sk->sk_nulls_node, list);
}
static inline void sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
{
sock_hold(sk);
__sk_nulls_add_node_rcu(sk, list);
}
static inline void __sk_del_bind_node(struct sock *sk)
{
__hlist_del(&sk->sk_bind_node);
}
static inline void sk_add_bind_node(struct sock *sk,
struct hlist_head *list)
{
hlist_add_head(&sk->sk_bind_node, list);
}
#define sk_for_each(__sk, 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)
#define sk_for_each_bound_safe(__sk, tmp, list) \
hlist_for_each_entry_safe(__sk, tmp, list, sk_bind_node)
#define sk_for_each_entry_offset_rcu(tpos, pos, head, offset) \
for (pos = rcu_dereference(hlist_first_rcu(head)); \
pos != NULL && \
({ tpos = (typeof(*tpos) *)((void *)pos - offset); 1;}); \
pos = rcu_dereference(hlist_next_rcu(pos)))
static inline struct user_namespace *sk_user_ns(const struct sock *sk)
{
return sk->sk_socket->file->f_cred->user_ns;
}
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,
SOCK_DBG,
SOCK_RCVTSTAMP,
SOCK_RCVTSTAMPNS,
SOCK_LOCALROUTE,
SOCK_MEMALLOC,
SOCK_TIMESTAMPING_RX_SOFTWARE,
SOCK_FASYNC,
SOCK_RXQ_OVFL,
SOCK_ZEROCOPY,
SOCK_WIFI_STATUS,
SOCK_NOFCS,
SOCK_FILTER_LOCKED,
SOCK_SELECT_ERR_QUEUE,
SOCK_RCU_FREE,
SOCK_TXTIME,
SOCK_XDP,
SOCK_TSTAMP_NEW,
SOCK_RCVMARK,
SOCK_RCVPRIORITY,
SOCK_TIMESTAMPING_ANY,
};
#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
#define SOCKCM_FLAG_TS_OPT_ID BIT(31)
static inline void sock_copy_flags(struct sock *nsk, const struct sock *osk)
{
nsk->sk_flags = osk->sk_flags;
}
static inline void sock_set_flag(struct sock *sk, enum sock_flags flag)
{
__set_bit(flag, &sk->sk_flags);
}
static inline void sock_reset_flag(struct sock *sk, enum sock_flags flag)
{
__clear_bit(flag, &sk->sk_flags);
}
static inline void sock_valbool_flag(struct sock *sk, enum sock_flags bit,
int valbool)
{
if (valbool)
sock_set_flag(sk, bit);
else
sock_reset_flag(sk, bit);
}
static inline bool sock_flag(const struct sock *sk, enum sock_flags flag)
{
return test_bit(flag, &sk->sk_flags);
}
#ifdef CONFIG_NET
DECLARE_STATIC_KEY_FALSE(memalloc_socks_key);
static inline int sk_memalloc_socks(void)
{
return static_branch_unlikely(&memalloc_socks_key);
}
void __receive_sock(struct file *file);
#else
static inline int sk_memalloc_socks(void)
{
return 0;
}
static inline void __receive_sock(struct file *file)
{ }
#endif
static inline gfp_t sk_gfp_mask(const struct sock *sk, gfp_t gfp_mask)
{
return gfp_mask | (sk->sk_allocation & __GFP_MEMALLOC);
}
static inline void sk_acceptq_removed(struct sock *sk)
{
WRITE_ONCE(sk->sk_ack_backlog, sk->sk_ack_backlog - 1);
}
static inline void sk_acceptq_added(struct sock *sk)
{
WRITE_ONCE(sk->sk_ack_backlog, sk->sk_ack_backlog + 1);
}
static inline bool sk_acceptq_is_full(const struct sock *sk)
{
return READ_ONCE(sk->sk_ack_backlog) > READ_ONCE(sk->sk_max_ack_backlog);
}
static inline int sk_stream_min_wspace(const struct sock *sk)
{
return READ_ONCE(sk->sk_wmem_queued) >> 1;
}
static inline int sk_stream_wspace(const struct sock *sk)
{
return READ_ONCE(sk->sk_sndbuf) - READ_ONCE(sk->sk_wmem_queued);
}
static inline void sk_wmem_queued_add(struct sock *sk, int val)
{
WRITE_ONCE(sk->sk_wmem_queued, sk->sk_wmem_queued + val);
}
static inline void sk_forward_alloc_add(struct sock *sk, int val)
{
WRITE_ONCE(sk->sk_forward_alloc, sk->sk_forward_alloc + val);
}
void sk_stream_write_space(struct sock *sk);
static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
{
skb_dst_force(skb);
if (!sk->sk_backlog.tail)
WRITE_ONCE(sk->sk_backlog.head, skb);
else
sk->sk_backlog.tail->next = skb;
WRITE_ONCE(sk->sk_backlog.tail, skb);
skb->next = NULL;
}
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;
}
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 (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC))
return -ENOMEM;
__sk_add_backlog(sk, skb);
sk->sk_backlog.len += skb->truesize;
return 0;
}
int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
INDIRECT_CALLABLE_DECLARE(int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb));
INDIRECT_CALLABLE_DECLARE(int tcp_v6_do_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 INDIRECT_CALL_INET(sk->sk_backlog_rcv,
tcp_v6_do_rcv,
tcp_v4_do_rcv,
sk, skb);
}
static inline void sk_incoming_cpu_update(struct sock *sk)
{
int cpu = raw_smp_processor_id();
if (unlikely(READ_ONCE(sk->sk_incoming_cpu) != cpu))
WRITE_ONCE(sk->sk_incoming_cpu, cpu);
}
static inline void sock_rps_save_rxhash(struct sock *sk,
const struct sk_buff *skb)
{
#ifdef CONFIG_RPS
if (unlikely(READ_ONCE(sk->sk_rxhash) != skb->hash))
WRITE_ONCE(sk->sk_rxhash, skb->hash);
#endif
}
static inline void sock_rps_reset_rxhash(struct sock *sk)
{
#ifdef CONFIG_RPS
WRITE_ONCE(sk->sk_rxhash, 0);
#endif
}
#define sk_wait_event(__sk, __timeo, __condition, __wait) \
({ int __rc, __dis = __sk->sk_disconnects; \
release_sock(__sk); \
__rc = __condition; \
if (!__rc) { \
*(__timeo) = wait_woken(__wait, \
TASK_INTERRUPTIBLE, \
*(__timeo)); \
} \
sched_annotate_sleep(); \
lock_sock(__sk); \
__rc = __dis == __sk->sk_disconnects ? __condition : -EPIPE; \
__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;
}
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 smc_hashinfo;
struct module;
struct sk_psock;
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));
}
struct proto_accept_arg {
int flags;
int err;
int is_empty;
bool kern;
};
struct proto {
void (*close)(struct sock *sk,
long timeout);
int (*pre_connect)(struct sock *sk,
struct sockaddr_unsized *uaddr,
int addr_len);
int (*connect)(struct sock *sk,
struct sockaddr_unsized *uaddr,
int addr_len);
int (*disconnect)(struct sock *sk, int flags);
struct sock * (*accept)(struct sock *sk,
struct proto_accept_arg *arg);
int (*ioctl)(struct sock *sk, int cmd,
int *karg);
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, sockptr_t optval,
unsigned int optlen);
int (*getsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int __user *option);
void (*keepalive)(struct sock *sk, int valbool);
#ifdef CONFIG_COMPAT
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 flags, int *addr_len);
void (*splice_eof)(struct socket *sock);
int (*bind)(struct sock *sk,
struct sockaddr_unsized *addr, int addr_len);
int (*bind_add)(struct sock *sk,
struct sockaddr_unsized *addr, int addr_len);
int (*backlog_rcv) (struct sock *sk,
struct sk_buff *skb);
bool (*bpf_bypass_getsockopt)(int level,
int optname);
void (*release_cb)(struct sock *sk);
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 (*put_port)(struct sock *sk);
#ifdef CONFIG_BPF_SYSCALL
int (*psock_update_sk_prot)(struct sock *sk,
struct sk_psock *psock,
bool restore);
#endif
#ifdef CONFIG_PROC_FS
unsigned int inuse_idx;
#endif
bool (*stream_memory_free)(const struct sock *sk, int wake);
bool (*sock_is_readable)(struct sock *sk);
void (*enter_memory_pressure)(struct sock *sk);
void (*leave_memory_pressure)(struct sock *sk);
atomic_long_t *memory_allocated;
int __percpu *per_cpu_fw_alloc;
struct percpu_counter *sockets_allocated;
unsigned long *memory_pressure;
long *sysctl_mem;
int *sysctl_wmem;
int *sysctl_rmem;
u32 sysctl_wmem_offset;
u32 sysctl_rmem_offset;
int max_header;
bool no_autobind;
struct kmem_cache *slab;
unsigned int obj_size;
unsigned int freeptr_offset;
unsigned int ipv6_pinfo_offset;
slab_flags_t slab_flags;
unsigned int useroffset;
unsigned int usersize;
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;
struct smc_hashinfo *smc_hash;
} h;
struct module *owner;
char name[32];
struct list_head node;
int (*diag_destroy)(struct sock *sk, int err);
} __randomize_layout;
int proto_register(struct proto *prot, int alloc_slab);
void proto_unregister(struct proto *prot);
int sock_load_diag_module(int family, int protocol);
INDIRECT_CALLABLE_DECLARE(bool tcp_stream_memory_free(const struct sock *sk, int wake));
static inline bool __sk_stream_memory_free(const struct sock *sk, int wake)
{
if (READ_ONCE(sk->sk_wmem_queued) >= READ_ONCE(sk->sk_sndbuf))
return false;
return sk->sk_prot->stream_memory_free ?
INDIRECT_CALL_INET_1(sk->sk_prot->stream_memory_free,
tcp_stream_memory_free, sk, wake) : true;
}
static inline bool sk_stream_memory_free(const struct sock *sk)
{
return __sk_stream_memory_free(sk, 0);
}
static inline bool __sk_stream_is_writeable(const struct sock *sk, int wake)
{
return sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) &&
__sk_stream_memory_free(sk, wake);
}
static inline bool sk_stream_is_writeable(const struct sock *sk)
{
return __sk_stream_is_writeable(sk, 0);
}
static inline int sk_under_cgroup_hierarchy(struct sock *sk,
struct cgroup *ancestor)
{
#ifdef CONFIG_SOCK_CGROUP_DATA
return cgroup_is_descendant(sock_cgroup_ptr(&sk->sk_cgrp_data),
ancestor);
#else
return -ENOTSUPP;
#endif
}
#define SK_ALLOC_PERCPU_COUNTER_BATCH 16
static inline void sk_sockets_allocated_dec(struct sock *sk)
{
percpu_counter_add_batch(sk->sk_prot->sockets_allocated, -1,
SK_ALLOC_PERCPU_COUNTER_BATCH);
}
static inline void sk_sockets_allocated_inc(struct sock *sk)
{
percpu_counter_add_batch(sk->sk_prot->sockets_allocated, 1,
SK_ALLOC_PERCPU_COUNTER_BATCH);
}
static inline u64
sk_sockets_allocated_read_positive(struct sock *sk)
{
return percpu_counter_read_positive(sk->sk_prot->sockets_allocated);
}
static inline int
proto_sockets_allocated_sum_positive(struct proto *prot)
{
return percpu_counter_sum_positive(prot->sockets_allocated);
}
#ifdef CONFIG_PROC_FS
#define PROTO_INUSE_NR 64
struct prot_inuse {
int all;
int val[PROTO_INUSE_NR];
};
static inline void sock_prot_inuse_add(const struct net *net,
const struct proto *prot, int val)
{
this_cpu_add(net->core.prot_inuse->val[prot->inuse_idx], val);
}
static inline void sock_inuse_add(const struct net *net, int val)
{
this_cpu_add(net->core.prot_inuse->all, val);
}
int sock_prot_inuse_get(struct net *net, struct proto *proto);
int sock_inuse_get(struct net *net);
#else
static inline void sock_prot_inuse_add(const struct net *net,
const struct proto *prot, int val)
{
}
static inline void sock_inuse_add(const struct net *net, int val)
{
}
#endif
static inline int __sk_prot_rehash(struct sock *sk)
{
sk->sk_prot->unhash(sk);
return sk->sk_prot->hash(sk);
}
#define SOCK_DESTROY_TIME (10*HZ)
#define PROT_SOCK 1024
#define SHUTDOWN_MASK 3
#define RCV_SHUTDOWN 1
#define SEND_SHUTDOWN 2
#define SOCK_BINDADDR_LOCK 4
#define SOCK_BINDPORT_LOCK 8
#define SOCK_CONNECT_BIND 16
struct socket_alloc {
struct socket socket;
struct inode vfs_inode;
};
static inline struct socket *SOCKET_I(struct inode *inode)
{
return &container_of(inode, struct socket_alloc, vfs_inode)->socket;
}
static inline struct inode *SOCK_INODE(struct socket *socket)
{
return &container_of(socket, struct socket_alloc, socket)->vfs_inode;
}
int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind);
int __sk_mem_schedule(struct sock *sk, int size, int kind);
void __sk_mem_reduce_allocated(struct sock *sk, int amount);
void __sk_mem_reclaim(struct sock *sk, int amount);
#define SK_MEM_SEND 0
#define SK_MEM_RECV 1
static inline long sk_prot_mem_limits(const struct sock *sk, int index)
{
return READ_ONCE(sk->sk_prot->sysctl_mem[index]);
}
static inline int sk_mem_pages(int amt)
{
return (amt + PAGE_SIZE - 1) >> PAGE_SHIFT;
}
static inline bool sk_has_account(struct sock *sk)
{
return !!sk->sk_prot->memory_allocated;
}
static inline bool sk_wmem_schedule(struct sock *sk, int size)
{
int delta;
if (!sk_has_account(sk))
return true;
delta = size - sk->sk_forward_alloc;
return delta <= 0 || __sk_mem_schedule(sk, delta, SK_MEM_SEND);
}
static inline bool
__sk_rmem_schedule(struct sock *sk, int size, bool pfmemalloc)
{
int delta;
if (!sk_has_account(sk))
return true;
delta = size - sk->sk_forward_alloc;
return delta <= 0 || __sk_mem_schedule(sk, delta, SK_MEM_RECV) ||
pfmemalloc;
}
static inline bool
sk_rmem_schedule(struct sock *sk, const struct sk_buff *skb, int size)
{
return __sk_rmem_schedule(sk, size, skb_pfmemalloc(skb));
}
static inline int sk_unused_reserved_mem(const struct sock *sk)
{
int unused_mem;
if (likely(!sk->sk_reserved_mem))
return 0;
unused_mem = sk->sk_reserved_mem - sk->sk_wmem_queued -
atomic_read(&sk->sk_rmem_alloc);
return unused_mem > 0 ? unused_mem : 0;
}
static inline void sk_mem_reclaim(struct sock *sk)
{
int reclaimable;
if (!sk_has_account(sk))
return;
reclaimable = sk->sk_forward_alloc - sk_unused_reserved_mem(sk);
if (reclaimable >= (int)PAGE_SIZE)
__sk_mem_reclaim(sk, reclaimable);
}
static inline void sk_mem_reclaim_final(struct sock *sk)
{
sk->sk_reserved_mem = 0;
sk_mem_reclaim(sk);
}
static inline void sk_mem_charge(struct sock *sk, int size)
{
if (!sk_has_account(sk))
return;
sk_forward_alloc_add(sk, -size);
}
static inline void sk_mem_uncharge(struct sock *sk, int size)
{
if (!sk_has_account(sk))
return;
sk_forward_alloc_add(sk, size);
sk_mem_reclaim(sk);
}
void __sk_charge(struct sock *sk, gfp_t gfp);
#if IS_ENABLED(CONFIG_PROVE_LOCKING) && IS_ENABLED(CONFIG_MODULES)
static inline void sk_owner_set(struct sock *sk, struct module *owner)
{
__module_get(owner);
sk->sk_owner = owner;
}
static inline void sk_owner_clear(struct sock *sk)
{
sk->sk_owner = NULL;
}
static inline void sk_owner_put(struct sock *sk)
{
module_put(sk->sk_owner);
}
#else
static inline void sk_owner_set(struct sock *sk, struct module *owner)
{
}
static inline void sk_owner_clear(struct sock *sk)
{
}
static inline void sk_owner_put(struct sock *sk)
{
}
#endif
#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
do { \
sk_owner_set(sk, THIS_MODULE); \
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)
static inline bool lockdep_sock_is_held(const struct sock *sk)
{
return lockdep_is_held(&sk->sk_lock) ||
lockdep_is_held(&sk->sk_lock.slock);
}
void lock_sock_nested(struct sock *sk, int subclass);
static inline void lock_sock(struct sock *sk)
{
lock_sock_nested(sk, 0);
}
void __lock_sock(struct sock *sk);
void __release_sock(struct sock *sk);
void release_sock(struct sock *sk);
#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) __acquires(&sk->sk_lock.slock);
static inline bool lock_sock_fast(struct sock *sk)
{
mutex_acquire(&sk->sk_lock.dep_map, 0, 0, _RET_IP_);
return __lock_sock_fast(sk);
}
static inline bool lock_sock_fast_nested(struct sock *sk)
{
mutex_acquire(&sk->sk_lock.dep_map, SINGLE_DEPTH_NESTING, 0, _RET_IP_);
return __lock_sock_fast(sk);
}
static inline void unlock_sock_fast(struct sock *sk, bool slow)
__releases(&sk->sk_lock.slock)
{
if (slow) {
release_sock(sk);
__release(&sk->sk_lock.slock);
} else {
mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
spin_unlock_bh(&sk->sk_lock.slock);
}
}
void sockopt_lock_sock(struct sock *sk);
void sockopt_release_sock(struct sock *sk);
bool sockopt_ns_capable(struct user_namespace *ns, int cap);
bool sockopt_capable(int cap);
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
}
static inline void sock_not_owned_by_me(const struct sock *sk)
{
#ifdef CONFIG_LOCKDEP
WARN_ON_ONCE(lockdep_sock_is_held(sk) && debug_locks);
#endif
}
static inline bool sock_owned_by_user(const struct sock *sk)
{
sock_owned_by_me(sk);
return sk->sk_lock.owned;
}
static inline bool sock_owned_by_user_nocheck(const struct sock *sk)
{
return sk->sk_lock.owned;
}
static inline void sock_release_ownership(struct sock *sk)
{
DEBUG_NET_WARN_ON_ONCE(!sock_owned_by_user_nocheck(sk));
sk->sk_lock.owned = 0;
mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
}
static inline bool sock_allow_reclassification(const struct sock *csk)
{
struct sock *sk = (struct sock *)csk;
return !sock_owned_by_user_nocheck(sk) &&
!spin_is_locked(&sk->sk_lock.slock);
}
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_net_refcnt_upgrade(struct sock *sk);
void sk_destruct(struct sock *sk);
struct sock *sk_clone(const struct sock *sk, const gfp_t priority, bool lock);
static inline struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
{
return sk_clone(sk, priority, true);
}
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);
struct sk_buff *sock_omalloc(struct sock *sk, unsigned long size,
gfp_t priority);
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);
void sock_pfree(struct sk_buff *skb);
static inline void skb_set_owner_edemux(struct sk_buff *skb, struct sock *sk)
{
skb_orphan(skb);
if (refcount_inc_not_zero(&sk->sk_refcnt)) {
skb->sk = sk;
skb->destructor = sock_edemux;
}
}
#else
#define sock_edemux sock_efree
#endif
int sk_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen);
int sock_setsockopt(struct socket *sock, int level, int op,
sockptr_t optval, unsigned int optlen);
int do_sock_setsockopt(struct socket *sock, bool compat, int level,
int optname, sockptr_t optval, int optlen);
int do_sock_getsockopt(struct socket *sock, bool compat, int level,
int optname, sockptr_t optval, sockptr_t optlen);
int sk_getsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, sockptr_t optlen);
int sock_gettstamp(struct socket *sock, void __user *userstamp,
bool timeval, bool time32);
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);
static inline struct sk_buff *sock_alloc_send_skb(struct sock *sk,
unsigned long size,
int noblock, int *errcode)
{
return sock_alloc_send_pskb(sk, size, 0, noblock, errcode, 0);
}
void *sock_kmalloc(struct sock *sk, int size, gfp_t priority);
void *sock_kmemdup(struct sock *sk, const void *src,
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);
static inline void sock_replace_proto(struct sock *sk, struct proto *proto)
{
if (sk->sk_socket)
clear_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags);
WRITE_ONCE(sk->sk_prot, proto);
}
struct sockcm_cookie {
u64 transmit_time;
u32 mark;
u32 tsflags;
u32 ts_opt_id;
u32 priority;
u32 dmabuf_id;
};
static inline void sockcm_init(struct sockcm_cookie *sockc,
const struct sock *sk)
{
*sockc = (struct sockcm_cookie) {
.mark = READ_ONCE(sk->sk_mark),
.tsflags = READ_ONCE(sk->sk_tsflags),
.priority = READ_ONCE(sk->sk_priority),
};
}
int __sock_cmsg_send(struct sock *sk, struct cmsghdr *cmsg,
struct sockcm_cookie *sockc);
int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
struct sockcm_cookie *sockc);
int sock_no_bind(struct socket *sock, struct sockaddr_unsized *saddr, int len);
int sock_no_connect(struct socket *sock, struct sockaddr_unsized *saddr, int len, int flags);
int sock_no_socketpair(struct socket *, struct socket *);
int sock_no_accept(struct socket *, struct socket *, struct proto_accept_arg *);
int sock_no_getname(struct socket *, struct sockaddr *, int);
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_sendmsg(struct socket *, struct msghdr *, size_t);
int sock_no_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t len);
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);
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,
sockptr_t optval, unsigned int optlen);
void sk_common_release(struct sock *sk);
void sock_init_data_uid(struct socket *sock, struct sock *sk, kuid_t uid);
void sock_init_data(struct socket *sock, struct sock *sk);
static inline void sock_put(struct sock *sk)
{
if (refcount_dec_and_test(&sk->sk_refcnt))
sk_free(sk);
}
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, bool refcounted);
static inline int sk_receive_skb(struct sock *sk, struct sk_buff *skb,
const int nested)
{
return __sk_receive_skb(sk, skb, nested, 1, true);
}
static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)
{
if (WARN_ON_ONCE((unsigned short)tx_queue >= USHRT_MAX))
return;
if (READ_ONCE(sk->sk_tx_queue_mapping) != tx_queue) {
WRITE_ONCE(sk->sk_tx_queue_mapping, tx_queue);
WRITE_ONCE(sk->sk_tx_queue_mapping_jiffies, jiffies);
return;
}
if (time_is_before_jiffies(READ_ONCE(sk->sk_tx_queue_mapping_jiffies) + HZ))
WRITE_ONCE(sk->sk_tx_queue_mapping_jiffies, jiffies);
}
#define NO_QUEUE_MAPPING USHRT_MAX
static inline void sk_tx_queue_clear(struct sock *sk)
{
WRITE_ONCE(sk->sk_tx_queue_mapping, NO_QUEUE_MAPPING);
}
int sk_tx_queue_get(const struct sock *sk);
static inline void __sk_rx_queue_set(struct sock *sk,
const struct sk_buff *skb,
bool force_set)
{
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
if (skb_rx_queue_recorded(skb)) {
u16 rx_queue = skb_get_rx_queue(skb);
if (force_set ||
unlikely(READ_ONCE(sk->sk_rx_queue_mapping) != rx_queue))
WRITE_ONCE(sk->sk_rx_queue_mapping, rx_queue);
}
#endif
}
static inline void sk_rx_queue_set(struct sock *sk, const struct sk_buff *skb)
{
__sk_rx_queue_set(sk, skb, true);
}
static inline void sk_rx_queue_update(struct sock *sk, const struct sk_buff *skb)
{
__sk_rx_queue_set(sk, skb, false);
}
static inline void sk_rx_queue_clear(struct sock *sk)
{
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
WRITE_ONCE(sk->sk_rx_queue_mapping, NO_QUEUE_MAPPING);
#endif
}
static inline int sk_rx_queue_get(const struct sock *sk)
{
#ifdef CONFIG_SOCK_RX_QUEUE_MAPPING
if (sk) {
int res = READ_ONCE(sk->sk_rx_queue_mapping);
if (res != NO_QUEUE_MAPPING)
return res;
}
#endif
return -1;
}
static inline void sk_set_socket(struct sock *sk, struct socket *sock)
{
WRITE_ONCE(sk->sk_socket, sock);
if (sock) {
WRITE_ONCE(sk->sk_uid, SOCK_INODE(sock)->i_uid);
WRITE_ONCE(sk->sk_ino, SOCK_INODE(sock)->i_ino);
} else {
WRITE_ONCE(sk->sk_ino, 0);
}
}
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;
}
static inline void sock_orphan(struct sock *sk)
{
write_lock_bh(&sk->sk_callback_lock);
sock_set_flag(sk, SOCK_DEAD);
sk_set_socket(sk, NULL);
sk->sk_wq = NULL;
write_unlock_bh(&sk->sk_callback_lock);
}
static inline void sock_graft(struct sock *sk, struct socket *parent)
{
WARN_ON(parent->sk);
write_lock_bh(&sk->sk_callback_lock);
rcu_assign_pointer(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);
}
static inline unsigned long sock_i_ino(const struct sock *sk)
{
return READ_ONCE(sk->sk_ino);
}
static inline kuid_t sk_uid(const struct sock *sk)
{
return READ_ONCE(sk->sk_uid);
}
static inline kuid_t sock_net_uid(const struct net *net, const struct sock *sk)
{
return sk ? sk_uid(sk) : make_kuid(net->user_ns, 0);
}
static inline u32 net_tx_rndhash(void)
{
u32 v = get_random_u32();
return v ?: 1;
}
static inline void sk_set_txhash(struct sock *sk)
{
WRITE_ONCE(sk->sk_txhash, net_tx_rndhash());
}
static inline bool sk_rethink_txhash(struct sock *sk)
{
if (sk->sk_txhash && sk->sk_txrehash == SOCK_TXREHASH_ENABLED) {
sk_set_txhash(sk);
return true;
}
return false;
}
static inline struct dst_entry *
__sk_dst_get(const struct sock *sk)
{
return rcu_dereference_check(sk->sk_dst_cache,
lockdep_sock_is_held(sk));
}
static inline struct dst_entry *
sk_dst_get(const struct sock *sk)
{
struct dst_entry *dst;
rcu_read_lock();
dst = rcu_dereference(sk->sk_dst_cache);
if (dst && !rcuref_get(&dst->__rcuref))
dst = NULL;
rcu_read_unlock();
return dst;
}
static inline void __dst_negative_advice(struct sock *sk)
{
struct dst_entry *dst = __sk_dst_get(sk);
if (dst && dst->ops->negative_advice)
dst->ops->negative_advice(sk, dst);
}
static inline void dst_negative_advice(struct sock *sk)
{
sk_rethink_txhash(sk);
__dst_negative_advice(sk);
}
static inline void
__sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
struct dst_entry *old_dst;
sk_tx_queue_clear(sk);
WRITE_ONCE(sk->sk_dst_pending_confirm, 0);
old_dst = rcu_dereference_protected(sk->sk_dst_cache,
lockdep_sock_is_held(sk));
rcu_assign_pointer(sk->sk_dst_cache, dst);
dst_release(old_dst);
}
static inline void
sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
struct dst_entry *old_dst;
sk_tx_queue_clear(sk);
WRITE_ONCE(sk->sk_dst_pending_confirm, 0);
old_dst = unrcu_pointer(xchg(&sk->sk_dst_cache, RCU_INITIALIZER(dst)));
dst_release(old_dst);
}
static inline void
__sk_dst_reset(struct sock *sk)
{
__sk_dst_set(sk, NULL);
}
static inline void
sk_dst_reset(struct sock *sk)
{
sk_dst_set(sk, NULL);
}
struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
static inline void sk_dst_confirm(struct sock *sk)
{
if (!READ_ONCE(sk->sk_dst_pending_confirm))
WRITE_ONCE(sk->sk_dst_pending_confirm, 1);
}
static inline void sock_confirm_neigh(struct sk_buff *skb, struct neighbour *n)
{
if (skb_get_dst_pending_confirm(skb)) {
struct sock *sk = skb->sk;
if (sk && READ_ONCE(sk->sk_dst_pending_confirm))
WRITE_ONCE(sk->sk_dst_pending_confirm, 0);
neigh_confirm(n);
}
}
bool sk_mc_loop(const 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);
}
void sk_setup_caps(struct sock *sk, struct dst_entry *dst);
static inline void sk_gso_disable(struct sock *sk)
{
sk->sk_gso_disabled = 1;
sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
}
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_full(to, copy, &csum, from))
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_full_nocache(to, copy, from))
return -EFAULT;
} else if (!copy_from_iter_full(to, copy, from))
return -EFAULT;
return 0;
}
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;
}
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_add(skb, copy);
sk_wmem_queued_add(sk, copy);
sk_mem_charge(sk, copy);
return 0;
}
#define SK_WMEM_ALLOC_BIAS 1
static inline int sk_wmem_alloc_get(const struct sock *sk)
{
return refcount_read(&sk->sk_wmem_alloc) - SK_WMEM_ALLOC_BIAS;
}
static inline int sk_rmem_alloc_get(const struct sock *sk)
{
return atomic_read(&sk->sk_rmem_alloc);
}
static inline bool sk_has_allocations(const struct sock *sk)
{
return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
}
static inline bool skwq_has_sleeper(struct socket_wq *wq)
{
return wq && wq_has_sleeper(&wq->wait);
}
static inline void sock_poll_wait(struct file *filp, struct socket *sock,
poll_table *p)
{
poll_wait(filp, &sock->wq.wait, p);
}
static inline void skb_set_hash_from_sk(struct sk_buff *skb, struct sock *sk)
{
u32 txhash = READ_ONCE(sk->sk_txhash);
if (txhash) {
skb->l4_hash = 1;
skb->hash = txhash;
}
}
void skb_set_owner_w(struct sk_buff *skb, struct sock *sk);
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);
}
static inline __must_check bool skb_set_owner_sk_safe(struct sk_buff *skb, struct sock *sk)
{
if (sk && refcount_inc_not_zero(&sk->sk_refcnt)) {
skb_orphan(skb);
skb->destructor = sock_efree;
skb->sk = sk;
return true;
}
return false;
}
static inline struct sk_buff *skb_clone_and_charge_r(struct sk_buff *skb, struct sock *sk)
{
skb = skb_clone(skb, sk_gfp_mask(sk, GFP_ATOMIC));
if (skb) {
if (sk_rmem_schedule(sk, skb, skb->truesize)) {
skb_set_owner_r(skb, sk);
return skb;
}
__kfree_skb(skb);
}
return NULL;
}
static inline void skb_prepare_for_gro(struct sk_buff *skb)
{
if (skb->destructor != sock_wfree) {
skb_orphan(skb);
return;
}
skb->slow_gro = 1;
}
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);
void sk_stop_timer_sync(struct sock *sk, struct timer_list *timer);
int __sk_queue_drop_skb(struct sock *sk, struct sk_buff_head *sk_queue,
struct sk_buff *skb, unsigned int flags,
void (*destructor)(struct sock *sk,
struct sk_buff *skb));
int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
int sock_queue_rcv_skb_reason(struct sock *sk, struct sk_buff *skb,
enum skb_drop_reason *reason);
static inline int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
return sock_queue_rcv_skb_reason(sk, skb, NULL);
}
int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);
struct sk_buff *sock_dequeue_err_skb(struct sock *sk);
static inline int sock_error(struct sock *sk)
{
int err;
if (likely(data_race(!sk->sk_err)))
return 0;
err = xchg(&sk->sk_err, 0);
return -err;
}
void sk_error_report(struct sock *sk);
static inline unsigned long sock_wspace(struct sock *sk)
{
int amt = 0;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
amt = sk->sk_sndbuf - refcount_read(&sk->sk_wmem_alloc);
if (amt < 0)
amt = 0;
}
return amt;
}
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);
}
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);
}
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();
}
}
static inline void sk_wake_async_rcu(const struct sock *sk, int how, int band)
{
if (unlikely(sock_flag(sk, SOCK_FASYNC)))
sock_wake_async(rcu_dereference(sk->sk_wq), how, band);
}
#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)
{
u32 val;
if (sk->sk_userlocks & SOCK_SNDBUF_LOCK)
return;
val = min(sk->sk_sndbuf, sk->sk_wmem_queued >> 1);
val = max_t(u32, val, sk_unused_reserved_mem(sk));
WRITE_ONCE(sk->sk_sndbuf, max_t(u32, val, SOCK_MIN_SNDBUF));
}
static inline struct page_frag *sk_page_frag(struct sock *sk)
{
if (sk->sk_use_task_frag)
return ¤t->task_frag;
return &sk->sk_frag;
}
bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
static inline bool __sock_writeable(const struct sock *sk, int wmem_alloc)
{
return wmem_alloc < (READ_ONCE(sk->sk_sndbuf) >> 1);
}
static inline bool sock_writeable(const struct sock *sk)
{
return __sock_writeable(sk, refcount_read(&sk->sk_wmem_alloc));
}
static inline gfp_t gfp_any(void)
{
return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}
static inline gfp_t gfp_memcg_charge(void)
{
return in_softirq() ? GFP_ATOMIC : GFP_KERNEL;
}
#ifdef CONFIG_MEMCG
static inline struct mem_cgroup *mem_cgroup_from_sk(const struct sock *sk)
{
return sk->sk_memcg;
}
static inline bool mem_cgroup_sk_enabled(const struct sock *sk)
{
return mem_cgroup_sockets_enabled && mem_cgroup_from_sk(sk);
}
static inline bool mem_cgroup_sk_under_memory_pressure(const struct sock *sk)
{
struct mem_cgroup *memcg = mem_cgroup_from_sk(sk);
#ifdef CONFIG_MEMCG_V1
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
return !!memcg->tcpmem_pressure;
#endif
do {
if (time_before64(get_jiffies_64(),
mem_cgroup_get_socket_pressure(memcg))) {
memcg_memory_event(mem_cgroup_from_sk(sk),
MEMCG_SOCK_THROTTLED);
return true;
}
} while ((memcg = parent_mem_cgroup(memcg)));
return false;
}
#else
static inline struct mem_cgroup *mem_cgroup_from_sk(const struct sock *sk)
{
return NULL;
}
static inline bool mem_cgroup_sk_enabled(const struct sock *sk)
{
return false;
}
static inline bool mem_cgroup_sk_under_memory_pressure(const struct sock *sk)
{
return false;
}
#endif
static inline long sock_rcvtimeo(const struct sock *sk, bool noblock)
{
return noblock ? 0 : READ_ONCE(sk->sk_rcvtimeo);
}
static inline long sock_sndtimeo(const struct sock *sk, bool noblock)
{
return noblock ? 0 : READ_ONCE(sk->sk_sndtimeo);
}
static inline int sock_rcvlowat(const struct sock *sk, int waitall, int len)
{
int v = waitall ? len : min_t(int, READ_ONCE(sk->sk_rcvlowat), len);
return v ?: 1;
}
static inline int sock_intr_errno(long timeo)
{
return timeo == MAX_SCHEDULE_TIMEOUT ? -ERESTARTSYS : -EINTR;
}
struct sock_skb_cb {
u32 dropcount;
};
#define SOCK_SKB_CB_OFFSET (sizeof_field(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 sk_drops_add(struct sock *sk, int segs)
{
struct numa_drop_counters *ndc = sk->sk_drop_counters;
if (ndc)
numa_drop_add(ndc, segs);
else
atomic_add(segs, &sk->sk_drops);
}
static inline void sk_drops_inc(struct sock *sk)
{
sk_drops_add(sk, 1);
}
static inline int sk_drops_read(const struct sock *sk)
{
const struct numa_drop_counters *ndc = sk->sk_drop_counters;
if (ndc) {
DEBUG_NET_WARN_ON_ONCE(atomic_read(&sk->sk_drops));
return numa_drop_read(ndc);
}
return atomic_read(&sk->sk_drops);
}
static inline void sk_drops_reset(struct sock *sk)
{
struct numa_drop_counters *ndc = sk->sk_drop_counters;
if (ndc)
numa_drop_reset(ndc);
atomic_set(&sk->sk_drops, 0);
}
static inline void
sock_skb_set_dropcount(const struct sock *sk, struct sk_buff *skb)
{
SOCK_SKB_CB(skb)->dropcount = sock_flag(sk, SOCK_RXQ_OVFL) ?
sk_drops_read(sk) : 0;
}
static inline void sk_drops_skbadd(struct sock *sk, const struct sk_buff *skb)
{
int segs = max_t(u16, 1, skb_shinfo(skb)->gso_segs);
sk_drops_add(sk, segs);
}
static inline ktime_t sock_read_timestamp(struct sock *sk)
{
#if BITS_PER_LONG==32
unsigned int seq;
ktime_t kt;
do {
seq = read_seqbegin(&sk->sk_stamp_seq);
kt = sk->sk_stamp;
} while (read_seqretry(&sk->sk_stamp_seq, seq));
return kt;
#else
return READ_ONCE(sk->sk_stamp);
#endif
}
static inline void sock_write_timestamp(struct sock *sk, ktime_t kt)
{
#if BITS_PER_LONG==32
write_seqlock(&sk->sk_stamp_seq);
sk->sk_stamp = kt;
write_sequnlock(&sk->sk_stamp_seq);
#else
WRITE_ONCE(sk->sk_stamp, kt);
#endif
}
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);
bool skb_has_tx_timestamp(struct sk_buff *skb, const struct sock *sk);
int skb_get_tx_timestamp(struct sk_buff *skb, struct sock *sk,
struct timespec64 *ts);
static inline void
sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
{
struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
u32 tsflags = READ_ONCE(sk->sk_tsflags);
ktime_t kt = skb->tstamp;
if (sock_flag(sk, SOCK_RCVTSTAMP) ||
(tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) ||
(kt && tsflags & SOF_TIMESTAMPING_SOFTWARE) ||
(hwtstamps->hwtstamp &&
(tsflags & SOF_TIMESTAMPING_RAW_HARDWARE)))
__sock_recv_timestamp(msg, sk, skb);
else
sock_write_timestamp(sk, kt);
if (sock_flag(sk, SOCK_WIFI_STATUS) && skb_wifi_acked_valid(skb))
__sock_recv_wifi_status(msg, sk, skb);
}
void __sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb);
#define SK_DEFAULT_STAMP (-1L * NSEC_PER_SEC)
static inline void sock_recv_cmsgs(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
#define FLAGS_RECV_CMSGS ((1UL << SOCK_RXQ_OVFL) | \
(1UL << SOCK_RCVTSTAMP) | \
(1UL << SOCK_RCVMARK) | \
(1UL << SOCK_RCVPRIORITY) | \
(1UL << SOCK_TIMESTAMPING_ANY))
#define TSFLAGS_ANY (SOF_TIMESTAMPING_SOFTWARE | \
SOF_TIMESTAMPING_RAW_HARDWARE)
if (READ_ONCE(sk->sk_flags) & FLAGS_RECV_CMSGS)
__sock_recv_cmsgs(msg, sk, skb);
else if (unlikely(sock_flag(sk, SOCK_TIMESTAMP)))
sock_write_timestamp(sk, skb->tstamp);
else if (unlikely(sock_read_timestamp(sk) == SK_DEFAULT_STAMP))
sock_write_timestamp(sk, 0);
}
void __sock_tx_timestamp(__u32 tsflags, __u8 *tx_flags);
static inline void _sock_tx_timestamp(struct sock *sk,
const struct sockcm_cookie *sockc,
__u8 *tx_flags, __u32 *tskey)
{
__u32 tsflags = sockc->tsflags;
if (unlikely(tsflags)) {
__sock_tx_timestamp(tsflags, tx_flags);
if (tsflags & SOF_TIMESTAMPING_OPT_ID && tskey &&
tsflags & SOF_TIMESTAMPING_TX_RECORD_MASK) {
if (tsflags & SOCKCM_FLAG_TS_OPT_ID)
*tskey = sockc->ts_opt_id;
else
*tskey = atomic_inc_return(&sk->sk_tskey) - 1;
}
}
}
static inline void sock_tx_timestamp(struct sock *sk,
const struct sockcm_cookie *sockc,
__u8 *tx_flags)
{
_sock_tx_timestamp(sk, sockc, tx_flags, NULL);
}
static inline void skb_setup_tx_timestamp(struct sk_buff *skb,
const struct sockcm_cookie *sockc)
{
_sock_tx_timestamp(skb->sk, sockc, &skb_shinfo(skb)->tx_flags,
&skb_shinfo(skb)->tskey);
}
static inline bool sk_is_inet(const struct sock *sk)
{
int family = READ_ONCE(sk->sk_family);
return family == AF_INET || family == AF_INET6;
}
static inline bool sk_is_tcp(const struct sock *sk)
{
return sk_is_inet(sk) &&
sk->sk_type == SOCK_STREAM &&
sk->sk_protocol == IPPROTO_TCP;
}
static inline bool sk_is_udp(const struct sock *sk)
{
return sk_is_inet(sk) &&
sk->sk_type == SOCK_DGRAM &&
sk->sk_protocol == IPPROTO_UDP;
}
static inline bool sk_is_unix(const struct sock *sk)
{
return sk->sk_family == AF_UNIX;
}
static inline bool sk_is_stream_unix(const struct sock *sk)
{
return sk_is_unix(sk) && sk->sk_type == SOCK_STREAM;
}
static inline bool sk_is_vsock(const struct sock *sk)
{
return sk->sk_family == AF_VSOCK;
}
static inline bool sk_may_scm_recv(const struct sock *sk)
{
return (IS_ENABLED(CONFIG_UNIX) && sk->sk_family == AF_UNIX) ||
sk->sk_family == AF_NETLINK ||
(IS_ENABLED(CONFIG_BT) && sk->sk_family == AF_BLUETOOTH);
}
static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb)
{
__skb_unlink(skb, &sk->sk_receive_queue);
__kfree_skb(skb);
}
static inline bool
skb_sk_is_prefetched(struct sk_buff *skb)
{
#ifdef CONFIG_INET
return skb->destructor == sock_pfree;
#else
return false;
#endif
}
static inline bool sk_fullsock(const struct sock *sk)
{
return (1 << sk->sk_state) & ~(TCPF_TIME_WAIT | TCPF_NEW_SYN_RECV);
}
static inline bool
sk_is_refcounted(struct sock *sk)
{
return !sk_fullsock(sk) || !sock_flag(sk, SOCK_RCU_FREE);
}
static inline bool
sk_requests_wifi_status(struct sock *sk)
{
return sk && sk_fullsock(sk) && sock_flag(sk, SOCK_WIFI_STATUS);
}
static inline bool sk_listener(const struct sock *sk)
{
return (1 << sk->sk_state) & (TCPF_LISTEN | TCPF_NEW_SYN_RECV);
}
static inline bool sk_listener_or_tw(const struct sock *sk)
{
return (1 << READ_ONCE(sk->sk_state)) &
(TCPF_LISTEN | TCPF_NEW_SYN_RECV | TCPF_TIME_WAIT);
}
void sock_enable_timestamp(struct sock *sk, enum sock_flags flag);
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);
void sk_get_meminfo(const struct sock *sk, u32 *meminfo);
#define _SK_MEM_PACKETS 256
#define _SK_MEM_OVERHEAD SKB_TRUESIZE(256)
#define SK_WMEM_DEFAULT (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
#define SK_RMEM_DEFAULT (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
extern __u32 sysctl_wmem_max;
extern __u32 sysctl_rmem_max;
extern __u32 sysctl_wmem_default;
extern __u32 sysctl_rmem_default;
#define SKB_FRAG_PAGE_ORDER get_order(32768)
DECLARE_STATIC_KEY_FALSE(net_high_order_alloc_disable_key);
static inline int sk_get_wmem0(const struct sock *sk, const struct proto *proto)
{
if (proto->sysctl_wmem_offset)
return READ_ONCE(*(int *)((void *)sock_net(sk) + proto->sysctl_wmem_offset));
return READ_ONCE(*proto->sysctl_wmem);
}
static inline int sk_get_rmem0(const struct sock *sk, const struct proto *proto)
{
if (proto->sysctl_rmem_offset)
return READ_ONCE(*(int *)((void *)sock_net(sk) + proto->sysctl_rmem_offset));
return READ_ONCE(*proto->sysctl_rmem);
}
static inline void sk_pacing_shift_update(struct sock *sk, int val)
{
if (!sk || !sk_fullsock(sk) || READ_ONCE(sk->sk_pacing_shift) == val)
return;
WRITE_ONCE(sk->sk_pacing_shift, val);
}
static inline bool sk_dev_equal_l3scope(struct sock *sk, int dif)
{
int bound_dev_if = READ_ONCE(sk->sk_bound_dev_if);
int mdif;
if (!bound_dev_if || bound_dev_if == dif)
return true;
mdif = l3mdev_master_ifindex_by_index(sock_net(sk), dif);
if (mdif && mdif == bound_dev_if)
return true;
return false;
}
void sock_def_readable(struct sock *sk);
int sock_bindtoindex(struct sock *sk, int ifindex, bool lock_sk);
void sock_set_timestamp(struct sock *sk, int optname, bool valbool);
int sock_set_timestamping(struct sock *sk, int optname,
struct so_timestamping timestamping);
#if defined(CONFIG_CGROUP_BPF)
void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op);
#else
static inline void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op)
{
}
#endif
void sock_no_linger(struct sock *sk);
void sock_set_keepalive(struct sock *sk);
void sock_set_priority(struct sock *sk, u32 priority);
void sock_set_rcvbuf(struct sock *sk, int val);
void sock_set_mark(struct sock *sk, u32 val);
void sock_set_reuseaddr(struct sock *sk);
void sock_set_reuseport(struct sock *sk);
void sock_set_sndtimeo(struct sock *sk, s64 secs);
int sock_bind_add(struct sock *sk, struct sockaddr_unsized *addr, int addr_len);
int sock_get_timeout(long timeo, void *optval, bool old_timeval);
int sock_copy_user_timeval(struct __kernel_sock_timeval *tv,
sockptr_t optval, int optlen, bool old_timeval);
int sock_ioctl_inout(struct sock *sk, unsigned int cmd,
void __user *arg, void *karg, size_t size);
int sk_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
static inline bool sk_is_readable(struct sock *sk)
{
const struct proto *prot = READ_ONCE(sk->sk_prot);
if (prot->sock_is_readable)
return prot->sock_is_readable(sk);
return false;
}
#endif
