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- #ifndef __LINUX_NET_AFUNIX_H
- #define __LINUX_NET_AFUNIX_H
- #include <linux/socket.h>
- #include <linux/un.h>
- #include <linux/mutex.h>
- #include <net/sock.h>
- void unix_inflight(struct user_struct *user, struct file *fp);
- void unix_notinflight(struct user_struct *user, struct file *fp);
- void unix_gc(void);
- void wait_for_unix_gc(void);
- struct sock *unix_get_socket(struct file *filp);
- struct sock *unix_peer_get(struct sock *);
- #define UNIX_HASH_SIZE 256
- #define UNIX_HASH_BITS 8
- extern unsigned int unix_tot_inflight;
- extern spinlock_t unix_table_lock;
- extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
- struct unix_address {
- atomic_t refcnt;
- int len;
- unsigned int hash;
- struct sockaddr_un name[0];
- };
- struct unix_skb_parms {
- struct pid *pid; /* Skb credentials */
- kuid_t uid;
- kgid_t gid;
- struct scm_fp_list *fp; /* Passed files */
- #ifdef CONFIG_SECURITY_NETWORK
- u32 secid; /* Security ID */
- #endif
- u32 consumed;
- };
- #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
- #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
- #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
- #define unix_state_lock_nested(s) \
- spin_lock_nested(&unix_sk(s)->lock, \
- SINGLE_DEPTH_NESTING)
- /* The AF_UNIX socket */
- struct unix_sock {
- /* WARNING: sk has to be the first member */
- struct sock sk;
- struct unix_address *addr;
- struct path path;
- struct mutex iolock, bindlock;
- struct sock *peer;
- struct list_head link;
- atomic_long_t inflight;
- spinlock_t lock;
- unsigned char recursion_level;
- unsigned long gc_flags;
- #define UNIX_GC_CANDIDATE 0
- #define UNIX_GC_MAYBE_CYCLE 1
- struct socket_wq peer_wq;
- wait_queue_t peer_wake;
- };
- static inline struct unix_sock *unix_sk(const struct sock *sk)
- {
- return (struct unix_sock *)sk;
- }
- #define peer_wait peer_wq.wait
- long unix_inq_len(struct sock *sk);
- long unix_outq_len(struct sock *sk);
- #ifdef CONFIG_SYSCTL
- int unix_sysctl_register(struct net *net);
- void unix_sysctl_unregister(struct net *net);
- #else
- static inline int unix_sysctl_register(struct net *net) { return 0; }
- static inline void unix_sysctl_unregister(struct net *net) {}
- #endif
- #endif
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