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 */
15 atomic_t processes; /* How many processes does this user have? */
16 atomic_t sigpending; /* How many pending signals does this user have? */
17 #ifdef CONFIG_FANOTIFY
18 atomic_t fanotify_listeners;
21 atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
23 #ifdef CONFIG_POSIX_MQUEUE
24 /* protected by mq_lock */
25 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
27 unsigned long locked_shm; /* How many pages of mlocked shm ? */
28 unsigned long unix_inflight; /* How many files in flight in unix sockets */
29 atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
31 /* Hash table maintenance information */
32 struct hlist_node uidhash_node;
35 #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \
36 defined(CONFIG_NET) || defined(CONFIG_IO_URING)
37 atomic_long_t locked_vm;
39 #ifdef CONFIG_WATCH_QUEUE
40 atomic_t nr_watches; /* The number of watches this user currently has */
43 /* Miscellaneous per-user rate limit */
44 struct ratelimit_state ratelimit;
47 extern int uids_sysfs_init(void);
49 extern struct user_struct *find_user(kuid_t);
51 extern struct user_struct root_user;
52 #define INIT_USER (&root_user)
55 /* per-UID process charging. */
56 extern struct user_struct * alloc_uid(kuid_t);
57 static inline struct user_struct *get_uid(struct user_struct *u)
59 refcount_inc(&u->__count);
62 extern void free_uid(struct user_struct *);
64 #endif /* _LINUX_SCHED_USER_H */