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/percpu_counter.h> 8 #include <linux/refcount.h> 9 #include <linux/ratelimit.h> 10 #include <linux/android_kabi.h> 11 12 /* 13 * Some day this will be a full-fledged user tracking system.. 14 */ 15 struct user_struct { 16 refcount_t __count; /* reference count */ 17 #ifdef CONFIG_EPOLL 18 struct percpu_counter epoll_watches; /* The number of file descriptors currently watched */ 19 #endif 20 unsigned long unix_inflight; /* How many files in flight in unix sockets */ 21 atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */ 22 23 /* Hash table maintenance information */ 24 struct hlist_node uidhash_node; 25 kuid_t uid; 26 27 #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \ 28 defined(CONFIG_NET) || defined(CONFIG_IO_URING) 29 atomic_long_t locked_vm; 30 #endif 31 #ifdef CONFIG_WATCH_QUEUE 32 atomic_t nr_watches; /* The number of watches this user currently has */ 33 #endif 34 35 /* Miscellaneous per-user rate limit */ 36 struct ratelimit_state ratelimit; 37 38 ANDROID_KABI_RESERVE(1); 39 ANDROID_KABI_RESERVE(2); 40 ANDROID_OEM_DATA_ARRAY(1, 2); 41 }; 42 43 extern int uids_sysfs_init(void); 44 45 extern struct user_struct *find_user(kuid_t); 46 47 extern struct user_struct root_user; 48 #define INIT_USER (&root_user) 49 50 51 /* per-UID process charging. */ 52 extern struct user_struct * alloc_uid(kuid_t); get_uid(struct user_struct * u)53static inline struct user_struct *get_uid(struct user_struct *u) 54 { 55 refcount_inc(&u->__count); 56 return u; 57 } 58 extern void free_uid(struct user_struct *); 59 60 #endif /* _LINUX_SCHED_USER_H */ 61