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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>
13struct ctl_table_header;
14
15extern struct proc_dir_entry proc_root;
16#ifdef CONFIG_PROC_SYSCTL
17extern int proc_sys_init(void);
18extern void sysctl_head_put(struct ctl_table_header *head);
19#else
20static inline void proc_sys_init(void) { }
21static inline void sysctl_head_put(struct ctl_table_header *head) { }
22#endif
23#ifdef CONFIG_NET
24extern int proc_net_init(void);
25#else
26static inline int proc_net_init(void) { return 0; }
27#endif
28
29struct vmalloc_info {
30 unsigned long used;
31 unsigned long largest_chunk;
32};
33
34extern struct mm_struct *mm_for_maps(struct task_struct *);
35
36#ifdef CONFIG_MMU
37#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
38extern void get_vmalloc_info(struct vmalloc_info *vmi);
39#else
40
41#define VMALLOC_TOTAL 0UL
42#define get_vmalloc_info(vmi) \
43do { \
44 (vmi)->used = 0; \
45 (vmi)->largest_chunk = 0; \
46} while(0)
47#endif
48
49extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
50 struct pid *pid, struct task_struct *task);
51extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
52 struct pid *pid, struct task_struct *task);
53extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
54 struct pid *pid, struct task_struct *task);
55extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
56 struct pid *pid, struct task_struct *task);
57extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
58
59extern const struct file_operations proc_pid_maps_operations;
60extern const struct file_operations proc_tid_maps_operations;
61extern const struct file_operations proc_pid_numa_maps_operations;
62extern const struct file_operations proc_tid_numa_maps_operations;
63extern const struct file_operations proc_pid_smaps_operations;
64extern const struct file_operations proc_tid_smaps_operations;
65extern const struct file_operations proc_clear_refs_operations;
66extern const struct file_operations proc_pagemap_operations;
67extern const struct file_operations proc_net_operations;
68extern const struct inode_operations proc_net_inode_operations;
69
70struct proc_maps_private {
71 struct pid *pid;
72 struct task_struct *task;
73#ifdef CONFIG_MMU
74 struct vm_area_struct *tail_vma;
75#endif
76};
77
78void proc_init_inodecache(void);
79
80static inline struct pid *proc_pid(struct inode *inode)
81{
82 return PROC_I(inode)->pid;
83}
84
85static inline struct task_struct *get_proc_task(struct inode *inode)
86{
87 return get_pid_task(proc_pid(inode), PIDTYPE_PID);
88}
89
90static inline int proc_fd(struct inode *inode)
91{
92 return PROC_I(inode)->fd;
93}
94
95struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
96 struct dentry *dentry);
97int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
98 filldir_t filldir);
99
100struct pde_opener {
101 struct inode *inode;
102 struct file *file;
103 int (*release)(struct inode *, struct file *);
104 struct list_head lh;
105};
106void pde_users_dec(struct proc_dir_entry *pde);
107
108extern spinlock_t proc_subdir_lock;
109
110struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
111int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
112unsigned long task_vsize(struct mm_struct *);
113unsigned long task_statm(struct mm_struct *,
114 unsigned long *, unsigned long *, unsigned long *, unsigned long *);
115void task_mem(struct seq_file *, struct mm_struct *);
116
117static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
118{
119 atomic_inc(&pde->count);
120 return pde;
121}
122void pde_put(struct proc_dir_entry *pde);
123
124int proc_fill_super(struct super_block *);
125struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
126int proc_remount(struct super_block *sb, int *flags, char *data);
127
128/*
129 * These are generic /proc routines that use the internal
130 * "struct proc_dir_entry" tree to traverse the filesystem.
131 *
132 * The /proc root directory has extended versions to take care
133 * of the /proc/<pid> subdirectories.
134 */
135int proc_readdir(struct file *, void *, filldir_t);
136struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
137
138
139
140/* Lookups */
141typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
142 struct task_struct *, const void *);
143int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
144 const char *name, int len,
145 instantiate_t instantiate, struct task_struct *task, const void *ptr);
146int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
147struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
148extern const struct dentry_operations pid_dentry_operations;
149int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
150int proc_setattr(struct dentry *dentry, struct iattr *attr);
151
152extern const struct inode_operations proc_ns_dir_inode_operations;
153extern const struct file_operations proc_ns_dir_operations;
154