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 #include <linux/android_kabi.h> 10 11 /* 12 * Some day this will be a full-fledged user tracking system.. 13 */ 14 struct user_struct { 15 refcount_t __count; /* reference count */ 16 atomic_t processes; /* How many processes does this user have? */ 17 atomic_t sigpending; /* How many pending signals does this user have? */ 18 #ifdef CONFIG_FANOTIFY 19 atomic_t fanotify_listeners; 20 #endif 21 #ifdef CONFIG_EPOLL 22 atomic_long_t epoll_watches; /* The number of file descriptors currently watched */ 23 #endif 24 #ifdef CONFIG_POSIX_MQUEUE 25 /* protected by mq_lock */ 26 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ 27 #endif 28 unsigned long locked_shm; /* How many pages of mlocked shm ? */ 29 unsigned long unix_inflight; /* How many files in flight in unix sockets */ 30 atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */ 31 32 /* Hash table maintenance information */ 33 struct hlist_node uidhash_node; 34 kuid_t uid; 35 36 #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \ 37 defined(CONFIG_NET) || defined(CONFIG_IO_URING) 38 atomic_long_t locked_vm; 39 #endif 40 #ifdef CONFIG_WATCH_QUEUE 41 atomic_t nr_watches; /* The number of watches this user currently has */ 42 #endif 43 44 /* Miscellaneous per-user rate limit */ 45 struct ratelimit_state ratelimit; 46 47 ANDROID_KABI_RESERVE(1); 48 ANDROID_KABI_RESERVE(2); 49 ANDROID_OEM_DATA_ARRAY(1, 2); 50 }; 51 52 extern int uids_sysfs_init(void); 53 54 extern struct user_struct *find_user(kuid_t); 55 56 extern struct user_struct root_user; 57 #define INIT_USER (&root_user) 58 59 60 /* per-UID process charging. */ 61 extern struct user_struct * alloc_uid(kuid_t); get_uid(struct user_struct * u)62static inline struct user_struct *get_uid(struct user_struct *u) 63 { 64 refcount_inc(&u->__count); 65 return u; 66 } 67 extern void free_uid(struct user_struct *); 68 69 #endif /* _LINUX_SCHED_USER_H */ 70