| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_SCHED_USER_H |
| #define _LINUX_SCHED_USER_H |
| |
| #include <linux/uidgid.h> |
| #include <linux/atomic.h> |
| #include <linux/percpu_counter.h> |
| #include <linux/refcount.h> |
| #include <linux/ratelimit.h> |
| |
| /* |
| * Some day this will be a full-fledged user tracking system.. |
| */ |
| struct user_struct { |
| refcount_t __count; /* reference count */ |
| #ifdef CONFIG_EPOLL |
| struct percpu_counter epoll_watches; /* The number of file descriptors currently watched */ |
| #endif |
| unsigned long unix_inflight; /* How many files in flight in unix sockets */ |
| atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */ |
| |
| /* Hash table maintenance information */ |
| struct hlist_node uidhash_node; |
| kuid_t uid; |
| |
| #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \ |
| defined(CONFIG_NET) || defined(CONFIG_IO_URING) |
| atomic_long_t locked_vm; |
| #endif |
| #ifdef CONFIG_WATCH_QUEUE |
| atomic_t nr_watches; /* The number of watches this user currently has */ |
| #endif |
| |
| /* Miscellaneous per-user rate limit */ |
| struct ratelimit_state ratelimit; |
| }; |
| |
| extern int uids_sysfs_init(void); |
| |
| extern struct user_struct *find_user(kuid_t); |
| |
| extern struct user_struct root_user; |
| #define INIT_USER (&root_user) |
| |
| |
| /* per-UID process charging. */ |
| extern struct user_struct * alloc_uid(kuid_t); |
| static inline struct user_struct *get_uid(struct user_struct *u) |
| { |
| refcount_inc(&u->__count); |
| return u; |
| } |
| extern void free_uid(struct user_struct *); |
| |
| #endif /* _LINUX_SCHED_USER_H */ |