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