Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_SCHED_USER_H
3#define _LINUX_SCHED_USER_H
4
5#include <linux/uidgid.h>
6#include <linux/atomic.h>
7#include <linux/refcount.h>
8#include <linux/ratelimit.h>
9
10/*
11 * Some day this will be a full-fledged user tracking system..
12 */
13struct user_struct {
14 refcount_t __count; /* reference count */
15#ifdef CONFIG_EPOLL
16 atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
17#endif
18 unsigned long unix_inflight; /* How many files in flight in unix sockets */
19 atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
20
21 /* Hash table maintenance information */
22 struct hlist_node uidhash_node;
23 kuid_t uid;
24
25#if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \
26 defined(CONFIG_NET) || defined(CONFIG_IO_URING)
27 atomic_long_t locked_vm;
28#endif
29#ifdef CONFIG_WATCH_QUEUE
30 atomic_t nr_watches; /* The number of watches this user currently has */
31#endif
32
33 /* Miscellaneous per-user rate limit */
34 struct ratelimit_state ratelimit;
35};
36
37extern int uids_sysfs_init(void);
38
39extern struct user_struct *find_user(kuid_t);
40
41extern struct user_struct root_user;
42#define INIT_USER (&root_user)
43
44
45/* per-UID process charging. */
46extern struct user_struct * alloc_uid(kuid_t);
47static inline struct user_struct *get_uid(struct user_struct *u)
48{
49 refcount_inc(&u->__count);
50 return u;
51}
52extern void free_uid(struct user_struct *);
53
54#endif /* _LINUX_SCHED_USER_H */