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TOMOYO Linux Cross Reference
Linux/include/net/af_unix.h

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  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 <net/sock.h>
  8 
  9 void unix_inflight(struct file *fp);
 10 void unix_notinflight(struct file *fp);
 11 void unix_gc(void);
 12 void wait_for_unix_gc(void);
 13 struct sock *unix_get_socket(struct file *filp);
 14 struct sock *unix_peer_get(struct sock *);
 15 
 16 #define UNIX_HASH_SIZE  256
 17 #define UNIX_HASH_BITS  8
 18 
 19 extern unsigned int unix_tot_inflight;
 20 extern spinlock_t unix_table_lock;
 21 extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
 22 
 23 struct unix_address {
 24         atomic_t        refcnt;
 25         int             len;
 26         unsigned int    hash;
 27         struct sockaddr_un name[0];
 28 };
 29 
 30 struct unix_skb_parms {
 31         struct pid              *pid;           /* Skb credentials      */
 32         kuid_t                  uid;
 33         kgid_t                  gid;
 34         struct scm_fp_list      *fp;            /* Passed files         */
 35 #ifdef CONFIG_SECURITY_NETWORK
 36         u32                     secid;          /* Security ID          */
 37 #endif
 38         u32                     consumed;
 39 };
 40 
 41 #define UNIXCB(skb)     (*(struct unix_skb_parms *)&((skb)->cb))
 42 #define UNIXSID(skb)    (&UNIXCB((skb)).secid)
 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 */
 51 struct 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            readlock;
 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 };
 67 #define unix_sk(__sk) ((struct unix_sock *)__sk)
 68 
 69 #define peer_wait peer_wq.wait
 70 
 71 long unix_inq_len(struct sock *sk);
 72 long unix_outq_len(struct sock *sk);
 73 
 74 #ifdef CONFIG_SYSCTL
 75 int unix_sysctl_register(struct net *net);
 76 void unix_sysctl_unregister(struct net *net);
 77 #else
 78 static inline int unix_sysctl_register(struct net *net) { return 0; }
 79 static inline void unix_sysctl_unregister(struct net *net) {}
 80 #endif
 81 #endif
 82 

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