| #ifndef _LINUX_SCHED_USER_H |
| #define _LINUX_SCHED_USER_H |
| |
| #include <linux/uidgid.h> |
| #include <linux/atomic.h> |
| |
| struct key; |
| |
| /* |
| * Some day this will be a full-fledged user tracking system.. |
| */ |
| struct user_struct { |
| atomic_t __count; /* reference count */ |
| atomic_t processes; /* How many processes does this user have? */ |
| atomic_t sigpending; /* How many pending signals does this user have? */ |
| #ifdef CONFIG_FANOTIFY |
| atomic_t fanotify_listeners; |
| #endif |
| #ifdef CONFIG_EPOLL |
| atomic_long_t epoll_watches; /* The number of file descriptors currently watched */ |
| #endif |
| #ifdef CONFIG_POSIX_MQUEUE |
| /* protected by mq_lock */ |
| unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ |
| #endif |
| unsigned long locked_shm; /* How many pages of mlocked shm ? */ |
| 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 */ |
| |
| #ifdef CONFIG_KEYS |
| struct key *uid_keyring; /* UID specific keyring */ |
| struct key *session_keyring; /* UID's default session keyring */ |
| #endif |
| |
| /* Hash table maintenance information */ |
| struct hlist_node uidhash_node; |
| kuid_t uid; |
| |
| #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) |
| atomic_long_t locked_vm; |
| #endif |
| }; |
| |
| 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) |
| { |
| atomic_inc(&u->__count); |
| return u; |
| } |
| extern void free_uid(struct user_struct *); |
| |
| #endif /* _LINUX_SCHED_USER_H */ |