1#ifndef __LINUX_NET_AFUNIX_H 2#define __LINUX_NET_AFUNIX_H 3 4#include <linux/socket.h> 5#include <linux/un.h> 6#include <linux/mutex.h> 7#include <linux/refcount.h> 8#include <net/sock.h> 9 10void unix_inflight(struct user_struct *user, struct file *fp); 11void unix_notinflight(struct user_struct *user, struct file *fp); 12void unix_gc(void); 13void wait_for_unix_gc(void); 14struct sock *unix_get_socket(struct file *filp); 15struct sock *unix_peer_get(struct sock *); 16 17#define UNIX_HASH_SIZE 256 18#define UNIX_HASH_BITS 8 19 20extern unsigned int unix_tot_inflight; 21extern spinlock_t unix_table_lock; 22extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE]; 23 24struct unix_address { 25 refcount_t refcnt; 26 int len; 27 unsigned int hash; 28 struct sockaddr_un name[0]; 29}; 30 31struct unix_skb_parms { 32 struct pid *pid; /* Skb credentials */ 33 kuid_t uid; 34 kgid_t gid; 35 struct scm_fp_list *fp; /* Passed files */ 36#ifdef CONFIG_SECURITY_NETWORK 37 u32 secid; /* Security ID */ 38#endif 39 u32 consumed; 40} __randomize_layout; 41 42#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) 43 44#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) 45#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) 46#define unix_state_lock_nested(s) \ 47 spin_lock_nested(&unix_sk(s)->lock, \ 48 SINGLE_DEPTH_NESTING) 49 50/* The AF_UNIX socket */ 51struct unix_sock { 52 /* WARNING: sk has to be the first member */ 53 struct sock sk; 54 struct unix_address *addr; 55 struct path path; 56 struct mutex iolock, bindlock; 57 struct sock *peer; 58 struct list_head link; 59 atomic_long_t inflight; 60 spinlock_t lock; 61 unsigned char recursion_level; 62 unsigned long gc_flags; 63#define UNIX_GC_CANDIDATE 0 64#define UNIX_GC_MAYBE_CYCLE 1 65 struct socket_wq peer_wq; 66 wait_queue_entry_t peer_wake; 67}; 68 69static inline struct unix_sock *unix_sk(const struct sock *sk) 70{ 71 return (struct unix_sock *)sk; 72} 73 74#define peer_wait peer_wq.wait 75 76long unix_inq_len(struct sock *sk); 77long unix_outq_len(struct sock *sk); 78 79#ifdef CONFIG_SYSCTL 80int unix_sysctl_register(struct net *net); 81void unix_sysctl_unregister(struct net *net); 82#else 83static inline int unix_sysctl_register(struct net *net) { return 0; } 84static inline void unix_sysctl_unregister(struct net *net) {} 85#endif 86#endif 87