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proc: Supply a function to remove a proc entry by PDE
[mirror_ubuntu-artful-kernel.git] / fs / proc / internal.h
CommitLineData
1da177e4
LT		 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
faf60af1 12#include <linux/sched.h>
1da177e4 13#include <linux/proc_fs.h>
e579d2c2 14#include <linux/binfmts.h>
1f87f0b5 15struct ctl_table_header;
9e781440 16struct mempolicy;
1da177e4 17
c74c120a 18extern struct proc_dir_entry proc_root;
e656d8a6 19extern void proc_self_init(void);
05565b65 20#ifdef CONFIG_PROC_SYSCTL
77b14db5 21extern int proc_sys_init(void);
1f87f0b5 22extern void sysctl_head_put(struct ctl_table_header *head);
05565b65
AM		 23#else
24static inline void proc_sys_init(void) { }
1f87f0b5 25static inline void sysctl_head_put(struct ctl_table_header *head) { }
05565b65 26#endif
457c4cbc
EB		 27#ifdef CONFIG_NET
28extern int proc_net_init(void);
29#else
30static inline int proc_net_init(void) { return 0; }
31#endif
77b14db5 32
1da177e4
LT		 33struct vmalloc_info {
34 unsigned long used;
35 unsigned long largest_chunk;
36};
37
38#ifdef CONFIG_MMU
39#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
40extern void get_vmalloc_info(struct vmalloc_info *vmi);
41#else
42
43#define VMALLOC_TOTAL 0UL
44#define get_vmalloc_info(vmi) \
45do { \
46 (vmi)->used = 0; \
47 (vmi)->largest_chunk = 0; \
48} while(0)
1da177e4
LT		 49#endif
50
ee992744
EB		 51extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
52 struct pid *pid, struct task_struct *task);
53extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
54 struct pid *pid, struct task_struct *task);
df5f8314
EB		 55extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
56 struct pid *pid, struct task_struct *task);
a56d3fc7
EB		 57extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
58 struct pid *pid, struct task_struct *task);
85863e47 59extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
1da177e4 60
81841161 61extern const struct file_operations proc_tid_children_operations;
b7643757
SP		 62extern const struct file_operations proc_pid_maps_operations;
63extern const struct file_operations proc_tid_maps_operations;
64extern const struct file_operations proc_pid_numa_maps_operations;
65extern const struct file_operations proc_tid_numa_maps_operations;
66extern const struct file_operations proc_pid_smaps_operations;
67extern const struct file_operations proc_tid_smaps_operations;
f248dcb3 68extern const struct file_operations proc_clear_refs_operations;
85863e47 69extern const struct file_operations proc_pagemap_operations;
e9720acd
PE		 70extern const struct file_operations proc_net_operations;
71extern const struct inode_operations proc_net_inode_operations;
faf60af1 72extern const struct inode_operations proc_pid_link_inode_operations;
99f89551 73
f2beb798
SW		 74struct proc_maps_private {
75 struct pid *pid;
76 struct task_struct *task;
77#ifdef CONFIG_MMU
78 struct vm_area_struct *tail_vma;
79#endif
9e781440
KH		 80#ifdef CONFIG_NUMA
81 struct mempolicy *task_mempolicy;
82#endif
f2beb798
SW		 83};
84
5bcd7ff9 85void proc_init_inodecache(void);
fee781e6 86
13b41b09 87static inline struct pid *proc_pid(struct inode *inode)
99f89551 88{
13b41b09 89 return PROC_I(inode)->pid;
99f89551
EB		 90}
91
92static inline struct task_struct *get_proc_task(struct inode *inode)
1da177e4 93{
13b41b09 94 return get_pid_task(proc_pid(inode), PIDTYPE_PID);
1da177e4
LT		 95}
96
faf60af1
CG		 97static inline int task_dumpable(struct task_struct *task)
98{
99 int dumpable = 0;
100 struct mm_struct *mm;
101
102 task_lock(task);
103 mm = task->mm;
104 if (mm)
105 dumpable = get_dumpable(mm);
106 task_unlock(task);
e579d2c2 107 if (dumpable == SUID_DUMP_USER)
faf60af1
CG		 108 return 1;
109 return 0;
110}
111
faf60af1
CG		 112static inline unsigned name_to_int(struct dentry *dentry)
113{
114 const char *name = dentry->d_name.name;
115 int len = dentry->d_name.len;
116 unsigned n = 0;
117
118 if (len > 1 && *name == '0')
119 goto out;
120 while (len-- > 0) {
121 unsigned c = *name++ - '0';
122 if (c > 9)
123 goto out;
124 if (n >= (~0U-9)/10)
125 goto out;
126 n *= 10;
127 n += c;
128 }
129 return n;
130out:
131 return ~0U;
132}
133
1dd704b6
DH		 134/*
135 * base.c
136 */
137extern int pid_delete_dentry(const struct dentry *);
138
e9720acd
PE		 139struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
140 struct dentry *dentry);
141int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
142 filldir_t filldir);
881adb85
AD		 143
144struct pde_opener {
881adb85 145 struct file *file;
881adb85 146 struct list_head lh;
05c0ae21
AV		 147 int closing;
148 struct completion *c;
881adb85 149};
866ad9a7 150
866ad9a7 151void proc_entry_rundown(struct proc_dir_entry *);
3174c21b
AV		 152
153extern spinlock_t proc_subdir_lock;
154
00cd8dd3 155struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int);
3174c21b
AV		 156int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
157unsigned long task_vsize(struct mm_struct *);
a2ade7b6
AD		 158unsigned long task_statm(struct mm_struct *,
159 unsigned long *, unsigned long *, unsigned long *, unsigned long *);
3174c21b
AV		 160void task_mem(struct seq_file *, struct mm_struct *);
161
135d5655
AD		 162static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
163{
164 atomic_inc(&pde->count);
165 return pde;
166}
167void pde_put(struct proc_dir_entry *pde);
3174c21b 168
3174c21b 169int proc_fill_super(struct super_block *);
6d1b6e4e 170struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
97412950 171int proc_remount(struct super_block *sb, int *flags, char *data);
3174c21b
AV		 172
173/*
174 * These are generic /proc routines that use the internal
175 * "struct proc_dir_entry" tree to traverse the filesystem.
176 *
177 * The /proc root directory has extended versions to take care
178 * of the /proc/<pid> subdirectories.
179 */
180int proc_readdir(struct file *, void *, filldir_t);
00cd8dd3 181struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
6b4e306a
EB		 182
183
184
185/* Lookups */
186typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
187 struct task_struct *, const void *);
188int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
189 const char *name, int len,
190 instantiate_t instantiate, struct task_struct *task, const void *ptr);
0b728e19 191int pid_revalidate(struct dentry *dentry, unsigned int flags);
6b4e306a
EB		 192struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
193extern const struct dentry_operations pid_dentry_operations;
194int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
195int proc_setattr(struct dentry *dentry, struct iattr *attr);
196
197extern const struct inode_operations proc_ns_dir_inode_operations;
198extern const struct file_operations proc_ns_dir_operations;
199
021ada7d 200extern int proc_setup_self(struct super_block *);
34db8aaf
DH		 201
202/*
203 * proc_devtree.c
204 */
205#ifdef CONFIG_PROC_DEVICETREE
206extern void proc_device_tree_init(void);
207#endif /* CONFIG_PROC_DEVICETREE */
208
209/*
210 * proc_tty.c
211 */
212#ifdef CONFIG_TTY
213extern void proc_tty_init(void);
214#else
215static inline void proc_tty_init(void) {}
216#endif
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