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); | |
f4e65870 | 13 | void unix_destruct_scm(struct sk_buff *skb); |
b60a8280 JP |
14 | void unix_gc(void); |
15 | void wait_for_unix_gc(void); | |
16 | struct sock *unix_get_socket(struct file *filp); | |
c4147bea | 17 | struct sock *unix_peer_get(struct sock *sk); |
1da177e4 LT |
18 | |
19 | #define UNIX_HASH_SIZE 256 | |
7123aaa3 | 20 | #define UNIX_HASH_BITS 8 |
1da177e4 | 21 | |
9305cfa4 | 22 | extern unsigned int unix_tot_inflight; |
fa7ff56f | 23 | extern spinlock_t unix_table_lock; |
7123aaa3 | 24 | extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE]; |
1da177e4 | 25 | |
1da177e4 | 26 | struct unix_address { |
8c9814b9 | 27 | refcount_t refcnt; |
1da177e4 | 28 | int len; |
95c96174 | 29 | unsigned int hash; |
e9553762 | 30 | struct sockaddr_un name[]; |
1da177e4 LT |
31 | }; |
32 | ||
33 | struct unix_skb_parms { | |
7361c36c | 34 | struct pid *pid; /* Skb credentials */ |
6b0ee8c0 EB |
35 | kuid_t uid; |
36 | kgid_t gid; | |
1da177e4 | 37 | struct scm_fp_list *fp; /* Passed files */ |
877ce7c1 | 38 | #ifdef CONFIG_SECURITY_NETWORK |
dc49c1f9 | 39 | u32 secid; /* Security ID */ |
877ce7c1 | 40 | #endif |
e370a723 | 41 | u32 consumed; |
3859a271 | 42 | } __randomize_layout; |
1da177e4 | 43 | |
3c32da19 | 44 | struct scm_stat { |
7782040b | 45 | atomic_t nr_fds; |
3c32da19 KT |
46 | }; |
47 | ||
b1c23444 | 48 | #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) |
1da177e4 | 49 | |
1c92b4e5 DM |
50 | #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) |
51 | #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) | |
52 | #define unix_state_lock_nested(s) \ | |
a09785a2 IM |
53 | spin_lock_nested(&unix_sk(s)->lock, \ |
54 | SINGLE_DEPTH_NESTING) | |
1da177e4 | 55 | |
1da177e4 LT |
56 | /* The AF_UNIX socket */ |
57 | struct unix_sock { | |
58 | /* WARNING: sk has to be the first member */ | |
59 | struct sock sk; | |
424c22fb | 60 | struct unix_address *addr; |
40ffe67d | 61 | struct path path; |
6e1ce3c3 | 62 | struct mutex iolock, bindlock; |
43815482 | 63 | struct sock *peer; |
1fd05ba5 | 64 | struct list_head link; |
43815482 ED |
65 | atomic_long_t inflight; |
66 | spinlock_t lock; | |
60bc851a ED |
67 | unsigned long gc_flags; |
68 | #define UNIX_GC_CANDIDATE 0 | |
69 | #define UNIX_GC_MAYBE_CYCLE 1 | |
43815482 | 70 | struct socket_wq peer_wq; |
424c22fb | 71 | wait_queue_entry_t peer_wake; |
3c32da19 | 72 | struct scm_stat scm_stat; |
314001f0 RS |
73 | #if IS_ENABLED(CONFIG_AF_UNIX_OOB) |
74 | struct sk_buff *oob_skb; | |
75 | #endif | |
1da177e4 | 76 | }; |
4613012d | 77 | |
c72eda06 | 78 | static inline struct unix_sock *unix_sk(const struct sock *sk) |
4613012d AC |
79 | { |
80 | return (struct unix_sock *)sk; | |
81 | } | |
20380731 | 82 | |
43815482 ED |
83 | #define peer_wait peer_wq.wait |
84 | ||
885ee74d PE |
85 | long unix_inq_len(struct sock *sk); |
86 | long unix_outq_len(struct sock *sk); | |
87 | ||
9825d866 CW |
88 | int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, |
89 | int flags); | |
94531cfc JW |
90 | int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, |
91 | int flags); | |
20380731 | 92 | #ifdef CONFIG_SYSCTL |
b60a8280 JP |
93 | int unix_sysctl_register(struct net *net); |
94 | void unix_sysctl_unregister(struct net *net); | |
20380731 | 95 | #else |
97577e38 PE |
96 | static inline int unix_sysctl_register(struct net *net) { return 0; } |
97 | static inline void unix_sysctl_unregister(struct net *net) {} | |
20380731 | 98 | #endif |
c6382918 CW |
99 | |
100 | #ifdef CONFIG_BPF_SYSCALL | |
94531cfc JW |
101 | extern struct proto unix_dgram_proto; |
102 | extern struct proto unix_stream_proto; | |
c6382918 | 103 | |
94531cfc JW |
104 | int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); |
105 | int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); | |
c6382918 CW |
106 | void __init unix_bpf_build_proto(void); |
107 | #else | |
108 | static inline void __init unix_bpf_build_proto(void) | |
109 | {} | |
110 | #endif | |
1da177e4 | 111 | #endif |