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