xref: /openbmc/linux/fs/proc/internal.h (revision e8e0929d)
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 void free_proc_entry(struct proc_dir_entry *de);
65 
66 void proc_init_inodecache(void);
67 
68 static inline struct pid *proc_pid(struct inode *inode)
69 {
70 	return PROC_I(inode)->pid;
71 }
72 
73 static inline struct task_struct *get_proc_task(struct inode *inode)
74 {
75 	return get_pid_task(proc_pid(inode), PIDTYPE_PID);
76 }
77 
78 static inline int proc_fd(struct inode *inode)
79 {
80 	return PROC_I(inode)->fd;
81 }
82 
83 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
84 		struct dentry *dentry);
85 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
86 		filldir_t filldir);
87 
88 struct pde_opener {
89 	struct inode *inode;
90 	struct file *file;
91 	int (*release)(struct inode *, struct file *);
92 	struct list_head lh;
93 };
94 void pde_users_dec(struct proc_dir_entry *pde);
95 
96 extern spinlock_t proc_subdir_lock;
97 
98 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
99 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
100 unsigned long task_vsize(struct mm_struct *);
101 int task_statm(struct mm_struct *, int *, int *, int *, int *);
102 void task_mem(struct seq_file *, struct mm_struct *);
103 
104 struct proc_dir_entry *de_get(struct proc_dir_entry *de);
105 void de_put(struct proc_dir_entry *de);
106 
107 extern struct vfsmount *proc_mnt;
108 int proc_fill_super(struct super_block *);
109 struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
110 
111 /*
112  * These are generic /proc routines that use the internal
113  * "struct proc_dir_entry" tree to traverse the filesystem.
114  *
115  * The /proc root directory has extended versions to take care
116  * of the /proc/<pid> subdirectories.
117  */
118 int proc_readdir(struct file *, void *, filldir_t);
119 struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
120