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 struct  ctl_table_header;
  14
  15 extern struct proc_dir_entry proc_root;
  16 #ifdef CONFIG_PROC_SYSCTL
  17 extern int proc_sys_init(void);
  18 extern void sysctl_head_put(struct ctl_table_header *head);
  19 #else
  20 static inline void proc_sys_init(void) { }
  21 static inline void sysctl_head_put(struct ctl_table_header *head) { }
  22 #endif
  23 #ifdef CONFIG_NET
  24 extern int proc_net_init(void);
  25 #else
  26 static inline int proc_net_init(void) { return 0; }
  27 #endif
  28
  29 struct vmalloc_info {
  30         unsigned long   used;
  31         unsigned long   largest_chunk;
  32 };
  33
  34 extern struct mm_struct *mm_for_maps(struct task_struct *);
  35
  36 #ifdef CONFIG_MMU
  37 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
  38 extern void get_vmalloc_info(struct vmalloc_info *vmi);
  39 #else
  40
  41 #define VMALLOC_TOTAL 0UL
  42 #define get_vmalloc_info(vmi)                   \
  43 do {                                            \
  44         (vmi)->used = 0;                        \
  45         (vmi)->largest_chunk = 0;               \
  46 } while(0)
  47 #endif
  48
  49 extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
  50                                 struct pid *pid, struct task_struct *task);
  51 extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
  52                                 struct pid *pid, struct task_struct *task);
  53 extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
  54                                 struct pid *pid, struct task_struct *task);
  55 extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
  56                                 struct pid *pid, struct task_struct *task);
  57 extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
  58
  59 extern const struct file_operations proc_maps_operations;
  60 extern const struct file_operations proc_numa_maps_operations;
  61 extern const struct file_operations proc_smaps_operations;
  62 extern const struct file_operations proc_clear_refs_operations;
  63 extern const struct file_operations proc_pagemap_operations;
  64 extern const struct file_operations proc_net_operations;
  65 extern const struct inode_operations proc_net_inode_operations;
  66
  67 struct proc_maps_private {
  68         struct pid *pid;
  69         struct task_struct *task;
  70 #ifdef CONFIG_MMU
  71         struct vm_area_struct *tail_vma;
  72 #endif
  73 };
  74
  75 void proc_init_inodecache(void);
  76
  77 static inline struct pid *proc_pid(struct inode *inode)
  78 {
  79         return PROC_I(inode)->pid;
  80 }
  81
  82 static inline struct task_struct *get_proc_task(struct inode *inode)
  83 {
  84         return get_pid_task(proc_pid(inode), PIDTYPE_PID);
  85 }
  86
  87 static inline int proc_fd(struct inode *inode)
  88 {
  89         return PROC_I(inode)->fd;
  90 }
  91
  92 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
  93                 struct dentry *dentry);
  94 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
  95                 filldir_t filldir);
  96
  97 struct pde_opener {
  98         struct inode *inode;
  99         struct file *file;
 100         int (*release)(struct inode *, struct file *);
 101         struct list_head lh;
 102 };
 103 void pde_users_dec(struct proc_dir_entry *pde);
 104
 105 extern spinlock_t proc_subdir_lock;
 106
 107 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
 108 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
 109 unsigned long task_vsize(struct mm_struct *);
 110 unsigned long task_statm(struct mm_struct *,
 111         unsigned long *, unsigned long *, unsigned long *, unsigned long *);
 112 void task_mem(struct seq_file *, struct mm_struct *);
 113
 114 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
 115 {
 116         atomic_inc(&pde->count);
 117         return pde;
 118 }
 119 void pde_put(struct proc_dir_entry *pde);
 120
 121 int proc_fill_super(struct super_block *);
 122 struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
 123 int proc_remount(struct super_block *sb, int *flags, char *data);
 124
 125 /*
 126  * These are generic /proc routines that use the internal
 127  * "struct proc_dir_entry" tree to traverse the filesystem.
 128  *
 129  * The /proc root directory has extended versions to take care
 130  * of the /proc/<pid> subdirectories.
 131  */
 132 int proc_readdir(struct file *, void *, filldir_t);
 133 struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
 134
 135
 136
 137 /* Lookups */
 138 typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
 139                                 struct task_struct *, const void *);
 140 int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
 141         const char *name, int len,
 142         instantiate_t instantiate, struct task_struct *task, const void *ptr);
 143 int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
 144 struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
 145 extern const struct dentry_operations pid_dentry_operations;
 146 int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
 147 int proc_setattr(struct dentry *dentry, struct iattr *attr);
 148
 149 extern const struct inode_operations proc_ns_dir_inode_operations;
 150 extern const struct file_operations proc_ns_dir_operations;
 151