9305cfa444
This counter is _always_ modified under the unix_gc_lock spinlock, so its atomicity can be provided w/o additional efforts. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#ifndef __LINUX_NET_AFUNIX_H
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#define __LINUX_NET_AFUNIX_H
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#include <linux/socket.h>
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#include <linux/un.h>
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#include <linux/mutex.h>
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#include <net/sock.h>
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extern void unix_inflight(struct file *fp);
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extern void unix_notinflight(struct file *fp);
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extern void unix_gc(void);
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#define UNIX_HASH_SIZE 256
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extern unsigned int unix_tot_inflight;
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struct unix_address {
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atomic_t refcnt;
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int len;
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unsigned hash;
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struct sockaddr_un name[0];
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};
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struct unix_skb_parms {
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struct ucred creds; /* Skb credentials */
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struct scm_fp_list *fp; /* Passed files */
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#ifdef CONFIG_SECURITY_NETWORK
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u32 secid; /* Security ID */
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#endif
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};
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#define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
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#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
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#define UNIXSID(skb) (&UNIXCB((skb)).secid)
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#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
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#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
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#define unix_state_lock_nested(s) \
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spin_lock_nested(&unix_sk(s)->lock, \
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SINGLE_DEPTH_NESTING)
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#ifdef __KERNEL__
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/* The AF_UNIX socket */
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struct unix_sock {
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/* WARNING: sk has to be the first member */
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struct sock sk;
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struct unix_address *addr;
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struct dentry *dentry;
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struct vfsmount *mnt;
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struct mutex readlock;
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struct sock *peer;
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struct sock *other;
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struct list_head link;
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atomic_t inflight;
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spinlock_t lock;
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unsigned int gc_candidate : 1;
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wait_queue_head_t peer_wait;
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};
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#define unix_sk(__sk) ((struct unix_sock *)__sk)
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#ifdef CONFIG_SYSCTL
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extern int sysctl_unix_max_dgram_qlen;
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extern void unix_sysctl_register(void);
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extern void unix_sysctl_unregister(void);
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#else
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static inline void unix_sysctl_register(void) {}
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static inline void unix_sysctl_unregister(void) {}
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#endif
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#endif
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#endif
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