mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-16 05:26:07 +00:00
f302d180c6
Currently, the size of AF_UNIX hash table is UNIX_HASH_SIZE * 2, the first half for bind()ed sockets and the second half for unbound ones. UNIX_HASH_SIZE * 2 is used to define the table and iterate over it. In some places, we use ARRAY_SIZE(unix_socket_table) instead of UNIX_HASH_SIZE * 2. However, we cannot use it anymore because we will allocate the hash table dynamically. Then, we would have to add UNIX_HASH_SIZE * 2 in many places, which would be troublesome. This patch adapts the UNIX_HASH_SIZE definition to include bound and unbound sockets and defines a new UNIX_HASH_MOD macro to ease calculations. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* 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 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;
|
|
extern spinlock_t unix_table_locks[UNIX_HASH_SIZE];
|
|
extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE];
|
|
|
|
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))
|
|
|
|
#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
|
|
#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
|
|
#define unix_state_lock_nested(s) \
|
|
spin_lock_nested(&unix_sk(s)->lock, \
|
|
SINGLE_DEPTH_NESTING)
|
|
|
|
/* 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;
|
|
atomic_long_t 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
|
|
};
|
|
|
|
static inline struct unix_sock *unix_sk(const struct sock *sk)
|
|
{
|
|
return (struct unix_sock *)sk;
|
|
}
|
|
|
|
#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
|