/* internal.h: internal procfs definitions
   *
   * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #include <linux/proc_fs.h>

  extern struct proc_dir_entry proc_root;

  #ifdef CONFIG_PROC_SYSCTL

  extern int proc_sys_init(void);

  #else
  static inline void proc_sys_init(void) { }
  #endif

  #ifdef CONFIG_NET
  extern int proc_net_init(void);
  #else
  static inline int proc_net_init(void) { return 0; }
  #endif

  struct vmalloc_info {
  	unsigned long	used;
  	unsigned long	largest_chunk;
  };

  extern struct mm_struct *mm_for_maps(struct task_struct *);

  #ifdef CONFIG_MMU
  #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
  extern void get_vmalloc_info(struct vmalloc_info *vmi);
  #else
  
  #define VMALLOC_TOTAL 0UL
  #define get_vmalloc_info(vmi)			\
  do {						\
  	(vmi)->used = 0;			\
  	(vmi)->largest_chunk = 0;		\
  } while(0)

  #endif

  extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
  				struct pid *pid, struct task_struct *task);
  extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
  				struct pid *pid, struct task_struct *task);

  extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
  				struct pid *pid, struct task_struct *task);

  extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
  				struct pid *pid, struct task_struct *task);

  extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);

  extern const struct file_operations proc_maps_operations;
  extern const struct file_operations proc_numa_maps_operations;
  extern const struct file_operations proc_smaps_operations;

  extern const struct file_operations proc_clear_refs_operations;

  extern const struct file_operations proc_pagemap_operations;

  extern const struct file_operations proc_net_operations;
  extern const struct inode_operations proc_net_inode_operations;

  struct proc_maps_private {
  	struct pid *pid;
  	struct task_struct *task;
  #ifdef CONFIG_MMU
  	struct vm_area_struct *tail_vma;
  #endif
  };

  void proc_init_inodecache(void);

  static inline struct pid *proc_pid(struct inode *inode)

  {

  	return PROC_I(inode)->pid;

  }
  
  static inline struct task_struct *get_proc_task(struct inode *inode)

  {

  	return get_pid_task(proc_pid(inode), PIDTYPE_PID);

  }

  static inline int proc_fd(struct inode *inode)

  {

  	return PROC_I(inode)->fd;

  }

  
  struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
  		struct dentry *dentry);
  int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
  		filldir_t filldir);

  
  struct pde_opener {
  	struct inode *inode;
  	struct file *file;
  	int (*release)(struct inode *, struct file *);
  	struct list_head lh;
  };

  void pde_users_dec(struct proc_dir_entry *pde);

  
  extern spinlock_t proc_subdir_lock;
  
  struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
  int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
  unsigned long task_vsize(struct mm_struct *);

  unsigned long task_statm(struct mm_struct *,
  	unsigned long *, unsigned long *, unsigned long *, unsigned long *);

  void task_mem(struct seq_file *, struct mm_struct *);

  static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
  {
  	atomic_inc(&pde->count);
  	return pde;
  }
  void pde_put(struct proc_dir_entry *pde);

  int proc_fill_super(struct super_block *);

  struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);

  int proc_remount(struct super_block *sb, int *flags, char *data);

  
  /*
   * These are generic /proc routines that use the internal
   * "struct proc_dir_entry" tree to traverse the filesystem.
   *
   * The /proc root directory has extended versions to take care
   * of the /proc/<pid> subdirectories.
   */
  int proc_readdir(struct file *, void *, filldir_t);
  struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);

  
  
  
  /* Lookups */
  typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
  				struct task_struct *, const void *);
  int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
  	const char *name, int len,
  	instantiate_t instantiate, struct task_struct *task, const void *ptr);
  int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
  struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
  extern const struct dentry_operations pid_dentry_operations;
  int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
  int proc_setattr(struct dentry *dentry, struct iattr *attr);
  
  extern const struct inode_operations proc_ns_dir_inode_operations;
  extern const struct file_operations proc_ns_dir_operations;