projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 8703e8a4 IM |
2 | #ifndef _LINUX_SCHED_USER_H |
| 3 | #define _LINUX_SCHED_USER_H | |
| 4 | ||
| de8deb0a IM |
5 | #include <linux/uidgid.h> |
| 6 | #include <linux/atomic.h> | |
| bef3efbe | 7 | #include <linux/ratelimit.h> |
| 8703e8a4 | 8 | |
| bcbb6a5b IM |
9 | struct key; |
| 10 | ||
| 11 | /* | |
| 12 | * Some day this will be a full-fledged user tracking system.. | |
| 13 | */ | |
| 14 | struct user_struct { | |
| 15 | atomic_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 | #ifdef CONFIG_KEYS | |
| 33 | struct key *uid_keyring; /* UID specific keyring */ | |
| 34 | struct key *session_keyring; /* UID's default session keyring */ | |
| 35 | #endif | |
| 36 | ||
| 37 | /* Hash table maintenance information */ | |
| 38 | struct hlist_node uidhash_node; | |
| 39 | kuid_t uid; | |
| 40 | ||
| a91dbff5 WB |
41 | #if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL) || \ |
| 42 | defined(CONFIG_NET) | |
| bcbb6a5b IM |
43 | atomic_long_t locked_vm; |
| 44 | #endif | |
| bef3efbe LT |
45 | |
| 46 | /* Miscellaneous per-user rate limit */ | |
| 47 | struct ratelimit_state ratelimit; | |
| bcbb6a5b IM |
48 | }; |
| 49 | ||
| 50 | extern int uids_sysfs_init(void); | |
| 51 | ||
| 52 | extern struct user_struct *find_user(kuid_t); | |
| 53 | ||
| 54 | extern struct user_struct root_user; | |
| 55 | #define INIT_USER (&root_user) | |
| 56 | ||
| 57 | ||
| 58 | /* per-UID process charging. */ | |
| 59 | extern struct user_struct * alloc_uid(kuid_t); | |
| 60 | static inline struct user_struct *get_uid(struct user_struct *u) | |
| 61 | { | |
| 62 | atomic_inc(&u->__count); | |
| 63 | return u; | |
| 64 | } | |
| 65 | extern void free_uid(struct user_struct *); | |
| 66 | ||
| 8703e8a4 | 67 | #endif /* _LINUX_SCHED_USER_H */ |