Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_NET_AFUNIX_H |
3 | #define __LINUX_NET_AFUNIX_H | |
20380731 | 4 | |
20380731 ACM |
5 | #include <linux/socket.h> |
6 | #include <linux/un.h> | |
57b47a53 | 7 | #include <linux/mutex.h> |
8c9814b9 | 8 | #include <linux/refcount.h> |
20380731 ACM |
9 | #include <net/sock.h> |
10 | ||
415e3d3e HFS |
11 | void unix_inflight(struct user_struct *user, struct file *fp); |
12 | void unix_notinflight(struct user_struct *user, struct file *fp); | |
b60a8280 JP |
13 | void unix_gc(void); |
14 | void wait_for_unix_gc(void); | |
15 | struct sock *unix_get_socket(struct file *filp); | |
16 | struct sock *unix_peer_get(struct sock *); | |
1da177e4 LT |
17 | |
18 | #define UNIX_HASH_SIZE 256 | |
7123aaa3 | 19 | #define UNIX_HASH_BITS 8 |
1da177e4 | 20 | |
9305cfa4 | 21 | extern unsigned int unix_tot_inflight; |
fa7ff56f | 22 | extern spinlock_t unix_table_lock; |
7123aaa3 | 23 | extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE]; |
1da177e4 | 24 | |
1da177e4 | 25 | struct unix_address { |
8c9814b9 | 26 | refcount_t refcnt; |
1da177e4 | 27 | int len; |
95c96174 | 28 | unsigned int hash; |
1da177e4 LT |
29 | struct sockaddr_un name[0]; |
30 | }; | |
31 | ||
32 | struct unix_skb_parms { | |
7361c36c | 33 | struct pid *pid; /* Skb credentials */ |
6b0ee8c0 EB |
34 | kuid_t uid; |
35 | kgid_t gid; | |
1da177e4 | 36 | struct scm_fp_list *fp; /* Passed files */ |
877ce7c1 | 37 | #ifdef CONFIG_SECURITY_NETWORK |
dc49c1f9 | 38 | u32 secid; /* Security ID */ |
877ce7c1 | 39 | #endif |
e370a723 | 40 | u32 consumed; |
3859a271 | 41 | } __randomize_layout; |
1da177e4 | 42 | |
43815482 | 43 | #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) |
1da177e4 | 44 | |
1c92b4e5 DM |
45 | #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) |
46 | #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) | |
47 | #define unix_state_lock_nested(s) \ | |
a09785a2 IM |
48 | spin_lock_nested(&unix_sk(s)->lock, \ |
49 | SINGLE_DEPTH_NESTING) | |
1da177e4 | 50 | |
1da177e4 LT |
51 | /* The AF_UNIX socket */ |
52 | struct unix_sock { | |
53 | /* WARNING: sk has to be the first member */ | |
54 | struct sock sk; | |
43815482 | 55 | struct unix_address *addr; |
40ffe67d | 56 | struct path path; |
6e1ce3c3 | 57 | struct mutex iolock, bindlock; |
43815482 | 58 | struct sock *peer; |
1fd05ba5 | 59 | struct list_head link; |
43815482 ED |
60 | atomic_long_t inflight; |
61 | spinlock_t lock; | |
60bc851a ED |
62 | unsigned long gc_flags; |
63 | #define UNIX_GC_CANDIDATE 0 | |
64 | #define UNIX_GC_MAYBE_CYCLE 1 | |
43815482 | 65 | struct socket_wq peer_wq; |
ac6424b9 | 66 | wait_queue_entry_t peer_wake; |
1da177e4 | 67 | }; |
4613012d | 68 | |
c72eda06 | 69 | static inline struct unix_sock *unix_sk(const struct sock *sk) |
4613012d AC |
70 | { |
71 | return (struct unix_sock *)sk; | |
72 | } | |
20380731 | 73 | |
43815482 ED |
74 | #define peer_wait peer_wq.wait |
75 | ||
885ee74d PE |
76 | long unix_inq_len(struct sock *sk); |
77 | long unix_outq_len(struct sock *sk); | |
78 | ||
20380731 | 79 | #ifdef CONFIG_SYSCTL |
b60a8280 JP |
80 | int unix_sysctl_register(struct net *net); |
81 | void unix_sysctl_unregister(struct net *net); | |
20380731 | 82 | #else |
97577e38 PE |
83 | static inline int unix_sysctl_register(struct net *net) { return 0; } |
84 | static inline void unix_sysctl_unregister(struct net *net) {} | |
20380731 | 85 | #endif |
1da177e4 | 86 | #endif |