1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SCHED_USER_H
3 #define _LINUX_SCHED_USER_H
5 #include <linux/uidgid.h>
6 #include <linux/atomic.h>
7 #include <linux/refcount.h>
8 #include <linux/ratelimit.h>
11 * Some day this will be a full-fledged user tracking system..
14 refcount_t __count; /* reference count */
16 atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
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 */
21 /* Hash table maintenance information */
22 struct hlist_node uidhash_node;
25 #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \
26 defined(CONFIG_NET) || defined(CONFIG_IO_URING)
27 atomic_long_t locked_vm;
29 #ifdef CONFIG_WATCH_QUEUE
30 atomic_t nr_watches; /* The number of watches this user currently has */
33 /* Miscellaneous per-user rate limit */
34 struct ratelimit_state ratelimit;
37 extern int uids_sysfs_init(void);
39 extern struct user_struct *find_user(kuid_t);
41 extern struct user_struct root_user;
42 #define INIT_USER (&root_user)
45 /* per-UID process charging. */
46 extern struct user_struct * alloc_uid(kuid_t);
47 static inline struct user_struct *get_uid(struct user_struct *u)
49 refcount_inc(&u->__count);
52 extern void free_uid(struct user_struct *);
54 #endif /* _LINUX_SCHED_USER_H */