[linux-block.git] / include / linux / sched / user.h

/* 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) || \
	defined(CONFIG_VFIO_PCI_ZDEV_KVM) || IS_ENABLED(CONFIG_IOMMUFD)
	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 */
Commit	Line	Data
	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/percpu_counter.h>
	8	#include <linux/refcount.h>
	9	#include <linux/ratelimit.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	#ifdef CONFIG_EPOLL
	17	struct percpu_counter epoll_watches; /* The number of file descriptors currently watched */
	18	#endif
	19	unsigned long unix_inflight; /* How many files in flight in unix sockets */
	20	atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
	21
	22	/* Hash table maintenance information */
	23	struct hlist_node uidhash_node;
	24	kuid_t uid;
	25
	26	#if defined(CONFIG_PERF_EVENTS) \|\| defined(CONFIG_BPF_SYSCALL) \|\| \
	27	defined(CONFIG_NET) \|\| defined(CONFIG_IO_URING) \|\| \
	28	defined(CONFIG_VFIO_PCI_ZDEV_KVM) \|\| IS_ENABLED(CONFIG_IOMMUFD)
	29	atomic_long_t locked_vm;
	30	#endif
	31	#ifdef CONFIG_WATCH_QUEUE
	32	atomic_t nr_watches; /* The number of watches this user currently has */
	33	#endif
	34
	35	/* Miscellaneous per-user rate limit */
	36	struct ratelimit_state ratelimit;
	37	};
	38
	39	extern int uids_sysfs_init(void);
	40
	41	extern struct user_struct *find_user(kuid_t);
	42
	43	extern struct user_struct root_user;
	44	#define INIT_USER (&root_user)
	45
	46
	47	/* per-UID process charging. */
	48	extern struct user_struct * alloc_uid(kuid_t);
	49	static inline struct user_struct get_uid(struct user_struct u)
	50	{
	51	refcount_inc(&u->__count);
	52	return u;
	53	}
	54	extern void free_uid(struct user_struct *);
	55
	56	#endif /* _LINUX_SCHED_USER_H */