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
  64struct proc_maps_private {
  65        struct pid *pid;
  66        struct task_struct *task;
  67#ifdef CONFIG_MMU
  68        struct vm_area_struct *tail_vma;
  69#endif
  70};
  71
  72void proc_init_inodecache(void);
  73
  74static inline struct pid *proc_pid(struct inode *inode)
  75{
  76        return PROC_I(inode)->pid;
  77}
  78
  79static inline struct task_struct *get_proc_task(struct inode *inode)
  80{
  81        return get_pid_task(proc_pid(inode), PIDTYPE_PID);
  82}
  83
  84static inline int proc_fd(struct inode *inode)
  85{
  86        return PROC_I(inode)->fd;
  87}
  88
  89struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
  90                struct dentry *dentry);
  91int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
  92                filldir_t filldir);
  93
  94struct pde_opener {
  95        struct inode *inode;
  96        struct file *file;
  97        int (*release)(struct inode *, struct file *);
  98        struct list_head lh;
  99};
 100void pde_users_dec(struct proc_dir_entry *pde);
 101
 102extern spinlock_t proc_subdir_lock;
 103
 104struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
 105int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
 106unsigned long task_vsize(struct mm_struct *);
 107unsigned long task_statm(struct mm_struct *,
 108        unsigned long *, unsigned long *, unsigned long *, unsigned long *);
 109void task_mem(struct seq_file *, struct mm_struct *);
 110
 111static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
 112{
 113        atomic_inc(&pde->count);
 114        return pde;
 115}
 116void pde_put(struct proc_dir_entry *pde);
 117
 118int proc_fill_super(struct super_block *);
 119struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
 120
 121/*
 122 * These are generic /proc routines that use the internal
 123 * "struct proc_dir_entry" tree to traverse the filesystem.
 124 *
 125 * The /proc root directory has extended versions to take care
 126 * of the /proc/<pid> subdirectories.
 127 */
 128int proc_readdir(struct file *, void *, filldir_t);
 129struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
 130
 131
 132
 133/* Lookups */
 134typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
 135                                struct task_struct *, const void *);
 136int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
 137        const char *name, int len,
 138        instantiate_t instantiate, struct task_struct *task, const void *ptr);
 139int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
 140struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
 141extern const struct dentry_operations pid_dentry_operations;
 142int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
 143int proc_setattr(struct dentry *dentry, struct iattr *attr);
 144
 145extern const struct inode_operations proc_ns_dir_inode_operations;
 146extern const struct file_operations proc_ns_dir_operations;
 147
 148