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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 extern void unix_inflight(struct file *fp);
 10 extern void unix_notinflight(struct file *fp);
 11 extern void unix_gc(void);
 12 extern void wait_for_unix_gc(void);
 13 extern struct sock *unix_get_socket(struct file *filp);
 14 
 15 #define UNIX_HASH_SIZE  256
 16 
 17 extern unsigned int unix_tot_inflight;
 18 
 19 struct unix_address {
 20         atomic_t        refcnt;
 21         int             len;
 22         unsigned        hash;
 23         struct sockaddr_un name[0];
 24 };
 25 
 26 struct unix_skb_parms {
 27         struct pid              *pid;           /* Skb credentials      */
 28         const struct cred       *cred;
 29         struct scm_fp_list      *fp;            /* Passed files         */
 30 #ifdef CONFIG_SECURITY_NETWORK
 31         u32                     secid;          /* Security ID          */
 32 #endif
 33 };
 34 
 35 #define UNIXCB(skb)     (*(struct unix_skb_parms *)&((skb)->cb))
 36 #define UNIXSID(skb)    (&UNIXCB((skb)).secid)
 37 
 38 #define unix_state_lock(s)      spin_lock(&unix_sk(s)->lock)
 39 #define unix_state_unlock(s)    spin_unlock(&unix_sk(s)->lock)
 40 #define unix_state_lock_nested(s) \
 41                                 spin_lock_nested(&unix_sk(s)->lock, \
 42                                 SINGLE_DEPTH_NESTING)
 43 
 44 #ifdef __KERNEL__
 45 /* The AF_UNIX socket */
 46 struct unix_sock {
 47         /* WARNING: sk has to be the first member */
 48         struct sock             sk;
 49         struct unix_address     *addr;
 50         struct dentry           *dentry;
 51         struct vfsmount         *mnt;
 52         struct mutex            readlock;
 53         struct sock             *peer;
 54         struct sock             *other;
 55         struct list_head        link;
 56         atomic_long_t           inflight;
 57         spinlock_t              lock;
 58         unsigned int            gc_candidate : 1;
 59         unsigned int            gc_maybe_cycle : 1;
 60         unsigned char           recursion_level;
 61         struct socket_wq        peer_wq;
 62 };
 63 #define unix_sk(__sk) ((struct unix_sock *)__sk)
 64 
 65 #define peer_wait peer_wq.wait
 66 
 67 #ifdef CONFIG_SYSCTL
 68 extern int unix_sysctl_register(struct net *net);
 69 extern void unix_sysctl_unregister(struct net *net);
 70 #else
 71 static inline int unix_sysctl_register(struct net *net) { return 0; }
 72 static inline void unix_sysctl_unregister(struct net *net) {}
 73 #endif
 74 #endif
 75 #endif
 76 

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