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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>
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