user.c File Reference

#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/key.h>
#include <linux/interrupt.h>
#include <linux/export.h>
#include <linux/user_namespace.h>

Go to the source code of this file.

Macros
#define	UIDHASH_BITS   (CONFIG_BASE_SMALL ? 3 : 7)
#define	UIDHASH_SZ   (1 << UIDHASH_BITS)
#define	UIDHASH_MASK   (UIDHASH_SZ - 1)
#define	__uidhashfn(uid)   (((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
#define	uidhashentry(uid)   (uidhash_table + __uidhashfn((__kuid_val(uid))))

Functions
	EXPORT_SYMBOL_GPL (init_user_ns)
struct user_struct *	find_user (kuid_t uid)
void	free_uid (struct user_struct *up)
struct user_struct *	alloc_uid (kuid_t uid)
	module_init (uid_cache_init)

Variables
struct user_namespace	init_user_ns
struct hlist_head	uidhash_table [UIDHASH_SZ]
struct user_struct	root_user

Macro Definition Documentation

#define __uidhashfn

(

uid

)

(((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)

Definition at line 65 of file user.c.

#define UIDHASH_BITS   (CONFIG_BASE_SMALL ? 3 : 7)

Definition at line 62 of file user.c.

#define UIDHASH_MASK   (UIDHASH_SZ - 1)

Definition at line 64 of file user.c.

#define UIDHASH_SZ   (1 << UIDHASH_BITS)

Definition at line 63 of file user.c.

#define uidhashentry

(

uid

)

(uidhash_table + __uidhashfn((__kuid_val(uid))))

Definition at line 66 of file user.c.

Function Documentation

struct user_struct* alloc_uid ( kuid_t  uid )

read

Definition at line 165 of file user.c.

EXPORT_SYMBOL_GPL

(

init_user_ns

)

struct user_struct* find_user ( kuid_t  uid )

read

Definition at line 140 of file user.c.

void free_uid

(

struct user_struct *

up

)

Definition at line 151 of file user.c.

module_init

(

uid_cache_init

)

Variable Documentation

struct user_namespace init_user_ns

Definition at line 24 of file user.c.

struct user_struct root_user

Initial value:

= {
    .__count    = ATOMIC_INIT(1),
    .processes  = ATOMIC_INIT(1),
    .files      = ATOMIC_INIT(0),
    .sigpending = ATOMIC_INIT(0),
    .locked_shm     = 0,
    .uid        = GLOBAL_ROOT_UID,
}

Definition at line 83 of file user.c.

struct hlist_head uidhash_table[UIDHASH_SZ]

Definition at line 69 of file user.c.