Warning: This file is not a C or C++ file. It does not have highlighting.
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
---|---|
2 | #ifndef __LINUX_NET_AFUNIX_H |
3 | #define __LINUX_NET_AFUNIX_H |
4 | |
5 | #include <linux/socket.h> |
6 | #include <linux/un.h> |
7 | #include <linux/mutex.h> |
8 | #include <linux/refcount.h> |
9 | #include <net/sock.h> |
10 | |
11 | #if IS_ENABLED(CONFIG_UNIX) |
12 | struct unix_sock *unix_get_socket(struct file *filp); |
13 | #else |
14 | static inline struct unix_sock *unix_get_socket(struct file *filp) |
15 | { |
16 | return NULL; |
17 | } |
18 | #endif |
19 | |
20 | extern spinlock_t unix_gc_lock; |
21 | extern unsigned int unix_tot_inflight; |
22 | |
23 | void unix_inflight(struct user_struct *user, struct file *fp); |
24 | void unix_notinflight(struct user_struct *user, struct file *fp); |
25 | void unix_gc(void); |
26 | void wait_for_unix_gc(struct scm_fp_list *fpl); |
27 | |
28 | struct sock *unix_peer_get(struct sock *sk); |
29 | |
30 | #define UNIX_HASH_MOD (256 - 1) |
31 | #define UNIX_HASH_SIZE (256 * 2) |
32 | #define UNIX_HASH_BITS 8 |
33 | |
34 | struct unix_address { |
35 | refcount_t refcnt; |
36 | int len; |
37 | struct sockaddr_un name[]; |
38 | }; |
39 | |
40 | struct unix_skb_parms { |
41 | struct pid *pid; /* Skb credentials */ |
42 | kuid_t uid; |
43 | kgid_t gid; |
44 | struct scm_fp_list *fp; /* Passed files */ |
45 | #ifdef CONFIG_SECURITY_NETWORK |
46 | u32 secid; /* Security ID */ |
47 | #endif |
48 | u32 consumed; |
49 | } __randomize_layout; |
50 | |
51 | struct scm_stat { |
52 | atomic_t nr_fds; |
53 | }; |
54 | |
55 | #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) |
56 | |
57 | /* The AF_UNIX socket */ |
58 | struct unix_sock { |
59 | /* WARNING: sk has to be the first member */ |
60 | struct sock sk; |
61 | struct unix_address *addr; |
62 | struct path path; |
63 | struct mutex iolock, bindlock; |
64 | struct sock *peer; |
65 | struct list_head link; |
66 | unsigned long inflight; |
67 | spinlock_t lock; |
68 | unsigned long gc_flags; |
69 | #define UNIX_GC_CANDIDATE 0 |
70 | #define UNIX_GC_MAYBE_CYCLE 1 |
71 | struct socket_wq peer_wq; |
72 | wait_queue_entry_t peer_wake; |
73 | struct scm_stat scm_stat; |
74 | #if IS_ENABLED(CONFIG_AF_UNIX_OOB) |
75 | struct sk_buff *oob_skb; |
76 | #endif |
77 | }; |
78 | |
79 | #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk) |
80 | #define unix_peer(sk) (unix_sk(sk)->peer) |
81 | |
82 | #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) |
83 | #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) |
84 | enum unix_socket_lock_class { |
85 | U_LOCK_NORMAL, |
86 | U_LOCK_SECOND, /* for double locking, see unix_state_double_lock(). */ |
87 | U_LOCK_DIAG, /* used while dumping icons, see sk_diag_dump_icons(). */ |
88 | }; |
89 | |
90 | static inline void unix_state_lock_nested(struct sock *sk, |
91 | enum unix_socket_lock_class subclass) |
92 | { |
93 | spin_lock_nested(&unix_sk(sk)->lock, subclass); |
94 | } |
95 | |
96 | #define peer_wait peer_wq.wait |
97 | |
98 | long unix_inq_len(struct sock *sk); |
99 | long unix_outq_len(struct sock *sk); |
100 | |
101 | int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, |
102 | int flags); |
103 | int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, |
104 | int flags); |
105 | #ifdef CONFIG_SYSCTL |
106 | int unix_sysctl_register(struct net *net); |
107 | void unix_sysctl_unregister(struct net *net); |
108 | #else |
109 | static inline int unix_sysctl_register(struct net *net) { return 0; } |
110 | static inline void unix_sysctl_unregister(struct net *net) {} |
111 | #endif |
112 | |
113 | #ifdef CONFIG_BPF_SYSCALL |
114 | extern struct proto unix_dgram_proto; |
115 | extern struct proto unix_stream_proto; |
116 | |
117 | int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); |
118 | int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); |
119 | void __init unix_bpf_build_proto(void); |
120 | #else |
121 | static inline void __init unix_bpf_build_proto(void) |
122 | {} |
123 | #endif |
124 | #endif |
125 |
Warning: This file is not a C or C++ file. It does not have highlighting.