LXR linux/fs/proc/internal.h

   1/* internal.h: internal procfs definitions
   2 *
   3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12#include <linux/proc_fs.h>
  13
  14extern struct proc_dir_entry proc_root;
  15#ifdef CONFIG_PROC_SYSCTL
  16extern int proc_sys_init(void);
  17#else
  18static inline void proc_sys_init(void) { }
  19#endif
  20#ifdef CONFIG_NET
  21extern int proc_net_init(void);
  22#else
  23static inline int proc_net_init(void) { return 0; }
  24#endif
  25
  26struct vmalloc_info {
  27        unsigned long   used;
  28        unsigned long   largest_chunk;
  29};
  30
  31extern struct mm_struct *mm_for_maps(struct task_struct *);
  32
  33#ifdef CONFIG_MMU
  34#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
  35extern void get_vmalloc_info(struct vmalloc_info *vmi);
  36#else
  37
  38#define VMALLOC_TOTAL 0UL
  39#define get_vmalloc_info(vmi)                   \
  40do {                                            \
  41        (vmi)->used = 0;                        \
  42        (vmi)->largest_chunk = 0;               \
  43} while(0)
  44#endif
  45
  46extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
  47                                struct pid *pid, struct task_struct *task);
  48extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
  49                                struct pid *pid, struct task_struct *task);
  50extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
  51                                struct pid *pid, struct task_struct *task);
  52extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
  53                                struct pid *pid, struct task_struct *task);
  54extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
  55
  56extern const struct file_operations proc_maps_operations;
  57extern const struct file_operations proc_numa_maps_operations;
  58extern const struct file_operations proc_smaps_operations;
  59extern const struct file_operations proc_clear_refs_operations;
  60extern const struct file_operations proc_pagemap_operations;
  61extern const struct file_operations proc_net_operations;
  62extern const struct inode_operations proc_net_inode_operations;
  63
  64void proc_init_inodecache(void);
  65
  66static inline struct pid *proc_pid(struct inode *inode)
  67{
  68        return PROC_I(inode)->pid;
  69}
  70
  71static inline struct task_struct *get_proc_task(struct inode *inode)
  72{
  73        return get_pid_task(proc_pid(inode), PIDTYPE_PID);
  74}
  75
  76static inline int proc_fd(struct inode *inode)
  77{
  78        return PROC_I(inode)->fd;
  79}
  80
  81struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
  82                struct dentry *dentry);
  83int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
  84                filldir_t filldir);
  85
  86struct pde_opener {
  87        struct inode *inode;
  88        struct file *file;
  89        int (*release)(struct inode *, struct file *);
  90        struct list_head lh;
  91};
  92void pde_users_dec(struct proc_dir_entry *pde);
  93
  94extern spinlock_t proc_subdir_lock;
  95
  96struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
  97int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
  98unsigned long task_vsize(struct mm_struct *);
  99int task_statm(struct mm_struct *, int *, int *, int *, int *);
 100void task_mem(struct seq_file *, struct mm_struct *);
 101
 102static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
 103{
 104        atomic_inc(&pde->count);
 105        return pde;
 106}
 107void pde_put(struct proc_dir_entry *pde);
 108
 109extern struct vfsmount *proc_mnt;
 110int proc_fill_super(struct super_block *);
 111struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
 112
 113/*
 114 * These are generic /proc routines that use the internal
 115 * "struct proc_dir_entry" tree to traverse the filesystem.
 116 *
 117 * The /proc root directory has extended versions to take care
 118 * of the /proc/<pid> subdirectories.
 119 */
 120int proc_readdir(struct file *, void *, filldir_t);
 121struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
 122