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usr
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src
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linux-headers-6.8.0-88
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include
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net
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Filename :
af_unix.h
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_NET_AFUNIX_H #define __LINUX_NET_AFUNIX_H #include <linux/socket.h> #include <linux/un.h> #include <linux/mutex.h> #include <linux/refcount.h> #include <net/sock.h> void unix_inflight(struct user_struct *user, struct file *fp); void unix_notinflight(struct user_struct *user, struct file *fp); void unix_destruct_scm(struct sk_buff *skb); void io_uring_destruct_scm(struct sk_buff *skb); void unix_gc(void); void wait_for_unix_gc(void); struct sock *unix_get_socket(struct file *filp); struct sock *unix_peer_get(struct sock *sk); #define UNIX_HASH_MOD (256 - 1) #define UNIX_HASH_SIZE (256 * 2) #define UNIX_HASH_BITS 8 extern unsigned int unix_tot_inflight; struct unix_address { refcount_t refcnt; int len; struct sockaddr_un name[]; }; struct unix_skb_parms { struct pid *pid; /* Skb credentials */ kuid_t uid; kgid_t gid; struct scm_fp_list *fp; /* Passed files */ #ifdef CONFIG_SECURITY_NETWORK u32 secid; /* Security ID */ #endif u32 consumed; } __randomize_layout; struct scm_stat { atomic_t nr_fds; }; #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) /* The AF_UNIX socket */ struct unix_sock { /* WARNING: sk has to be the first member */ struct sock sk; struct unix_address *addr; struct path path; struct mutex iolock, bindlock; struct sock *peer; struct list_head link; unsigned long inflight; spinlock_t lock; unsigned long gc_flags; #define UNIX_GC_CANDIDATE 0 #define UNIX_GC_MAYBE_CYCLE 1 struct socket_wq peer_wq; wait_queue_entry_t peer_wake; struct scm_stat scm_stat; #if IS_ENABLED(CONFIG_AF_UNIX_OOB) struct sk_buff *oob_skb; #endif }; #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk) #define unix_peer(sk) (unix_sk(sk)->peer) #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) enum unix_socket_lock_class { U_LOCK_NORMAL, U_LOCK_SECOND, /* for double locking, see unix_state_double_lock(). */ U_LOCK_DIAG, /* used while dumping icons, see sk_diag_dump_icons(). */ U_LOCK_GC_LISTENER, /* used for listening socket while determining gc * candidates to close a small race window. */ }; static inline void unix_state_lock_nested(struct sock *sk, enum unix_socket_lock_class subclass) { spin_lock_nested(&unix_sk(sk)->lock, subclass); } #define peer_wait peer_wq.wait long unix_inq_len(struct sock *sk); long unix_outq_len(struct sock *sk); int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, int flags); int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, int flags); #ifdef CONFIG_SYSCTL int unix_sysctl_register(struct net *net); void unix_sysctl_unregister(struct net *net); #else static inline int unix_sysctl_register(struct net *net) { return 0; } static inline void unix_sysctl_unregister(struct net *net) {} #endif #ifdef CONFIG_BPF_SYSCALL extern struct proto unix_dgram_proto; extern struct proto unix_stream_proto; int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); void __init unix_bpf_build_proto(void); #else static inline void __init unix_bpf_build_proto(void) {} #endif #endif