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
  14 extern struct proc_dir_entry proc_root;
  15 #ifdef CONFIG_PROC_SYSCTL
  16 extern int proc_sys_init(void);
  17 #else
  18 static inline void proc_sys_init(void) { }
  19 #endif
  20 #ifdef CONFIG_NET
  21 extern int proc_net_init(void);
  22 #else
  23 static inline int proc_net_init(void) { return 0; }
  24 #endif
  25
  26 struct vmalloc_info {
  27         unsigned long   used;
  28         unsigned long   largest_chunk;
  29 };
  30
  31 extern struct mm_struct *mm_for_maps(struct task_struct *);
  32
  33 #ifdef CONFIG_MMU
  34 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
  35 extern void get_vmalloc_info(struct vmalloc_info *vmi);
  36 #else
  37
  38 #define VMALLOC_TOTAL 0UL
  39 #define get_vmalloc_info(vmi)                   \
  40 do {                                            \
  41         (vmi)->used = 0;                        \
  42         (vmi)->largest_chunk = 0;               \
  43 } while(0)
  44 #endif
  45
  46 extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
  47                                 struct pid *pid, struct task_struct *task);
  48 extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
  49                                 struct pid *pid, struct task_struct *task);
  50 extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
  51                                 struct pid *pid, struct task_struct *task);
  52 extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
  53                                 struct pid *pid, struct task_struct *task);
  54 extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
  55
  56 extern const struct file_operations proc_maps_operations;
  57 extern const struct file_operations proc_numa_maps_operations;
  58 extern const struct file_operations proc_smaps_operations;
  59 extern const struct file_operations proc_clear_refs_operations;
  60 extern const struct file_operations proc_pagemap_operations;
  61 extern const struct file_operations proc_net_operations;
  62 extern const struct inode_operations proc_net_inode_operations;
  63
  64 void proc_init_inodecache(void);
  65
  66 static inline struct pid *proc_pid(struct inode *inode)
  67 {
  68         return PROC_I(inode)->pid;
  69 }
  70
  71 static inline struct task_struct *get_proc_task(struct inode *inode)
  72 {
  73         return get_pid_task(proc_pid(inode), PIDTYPE_PID);
  74 }
  75
  76 static inline int proc_fd(struct inode *inode)
  77 {
  78         return PROC_I(inode)->fd;
  79 }
  80
  81 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
  82                 struct dentry *dentry);
  83 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
  84                 filldir_t filldir);
  85
  86 struct pde_opener {
  87         struct inode *inode;
  88         struct file *file;
  89         int (*release)(struct inode *, struct file *);
  90         struct list_head lh;
  91 };
  92 void pde_users_dec(struct proc_dir_entry *pde);
  93
  94 extern spinlock_t proc_subdir_lock;
  95
  96 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
  97 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
  98 unsigned long task_vsize(struct mm_struct *);
  99 unsigned long task_statm(struct mm_struct *,
 100         unsigned long *, unsigned long *, unsigned long *, unsigned long *);
 101 void task_mem(struct seq_file *, struct mm_struct *);
 102
 103 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
 104 {
 105         atomic_inc(&pde->count);
 106         return pde;
 107 }
 108 void pde_put(struct proc_dir_entry *pde);
 109
 110 int proc_fill_super(struct super_block *);
 111 struct inode *proc_get_inode(struct super_block *, 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  */
 120 int proc_readdir(struct file *, void *, filldir_t);
 121 struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);