111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert/**************************************************************************** 211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert **************************************************************************** 311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** 411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** This header was automatically generated from a Linux kernel header 511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** of the same name, to make information necessary for userspace to 611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** call into the kernel available to libc. It contains only constants, 711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** structures, and macros generated from the original header, and thus, 811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** contains no copyrightable information. 911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** 1011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert **************************************************************************** 1111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert ****************************************************************************/ 1211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#ifndef __LINUX_FILE_H 1311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define __LINUX_FILE_H 1411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <asm/atomic.h> 1611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <linux/posix_types.h> 1711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <linux/compiler.h> 1811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <linux/spinlock.h> 1911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <linux/rcupdate.h> 2011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <linux/types.h> 2111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define NR_OPEN_DEFAULT BITS_PER_LONG 2311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2411cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct embedded_fd_set { 2511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert unsigned long fds_bits[1]; 2611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 2711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define EMBEDDED_FD_SET_SIZE (BITS_PER_BYTE * sizeof(struct embedded_fd_set)) 2911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 3011cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct fdtable { 3111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert unsigned int max_fds; 3211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert int max_fdset; 3311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct file ** fd; 3411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert fd_set *close_on_exec; 3511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert fd_set *open_fds; 3611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct rcu_head rcu; 3711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct files_struct *free_files; 3811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct fdtable *next; 3911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 4011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4111cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct files_struct { 4211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert atomic_t count; 4411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct fdtable *fdt; 4511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct fdtable fdtab; 4611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert spinlock_t file_lock ____cacheline_aligned_in_smp; 4811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert int next_fd; 4911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct embedded_fd_set close_on_exec_init; 5011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct embedded_fd_set open_fds_init; 5111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert struct file * fd_array[NR_OPEN_DEFAULT]; 5211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 5311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 5411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define files_fdtable(files) (rcu_dereference((files)->fdt)) 5511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 5611cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct kmem_cache; 5711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 5811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define fcheck(fd) fcheck_files(current->files, fd) 5911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 6011cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct task_struct; 6111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 6211cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct files_struct *get_files_struct(struct task_struct *); 6311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 6411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#endif 65