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1#ifndef _LINUX_PROC_FS_H
2#define _LINUX_PROC_FS_H
3
4#include <linux/config.h>
5#include <linux/slab.h>
6#include <linux/fs.h>
7#include <asm/atomic.h>
8
9/*
10 * The proc filesystem constants/structures
11 */
12
13/*
14 * Offset of the first process in the /proc root directory..
15 */
16#define FIRST_PROCESS_ENTRY 256
17
18
19/*
20 * We always define these enumerators
21 */
22
23enum {
24 PROC_ROOT_INO = 1,
25};
26
27#define PROC_SUPER_MAGIC 0x9fa0
28
29/*
30 * This is not completely implemented yet. The idea is to
31 * create an in-memory tree (like the actual /proc filesystem
32 * tree) of these proc_dir_entries, so that we can dynamically
33 * add new files to /proc.
34 *
35 * The "next" pointer creates a linked list of one /proc directory,
36 * while parent/subdir create the directory structure (every
37 * /proc file has a parent, but "subdir" is NULL for all
38 * non-directory entries).
39 *
40 * "get_info" is called at "read", while "owner" is used to protect module
41 * from unloading while proc_dir_entry is in use
42 */
43
44typedef int (read_proc_t)(char *page, char **start, off_t off,
45 int count, int *eof, void *data);
46typedef int (write_proc_t)(struct file *file, const char __user *buffer,
47 unsigned long count, void *data);
48typedef int (get_info_t)(char *, char **, off_t, int);
49
50struct proc_dir_entry {
51 unsigned int low_ino;
52 unsigned short namelen;
53 const char *name;
54 mode_t mode;
55 nlink_t nlink;
56 uid_t uid;
57 gid_t gid;
58 unsigned long size;
59 struct inode_operations * proc_iops;
60 struct file_operations * proc_fops;
61 get_info_t *get_info;
62 struct module *owner;
63 struct proc_dir_entry *next, *parent, *subdir;
64 void *data;
65 read_proc_t *read_proc;
66 write_proc_t *write_proc;
67 atomic_t count; /* use count */
68 int deleted; /* delete flag */
69 void *set;
70};
71
72struct kcore_list {
73 struct kcore_list *next;
74 unsigned long addr;
75 size_t size;
76};
77
78struct vmcore {
79 struct list_head list;
80 unsigned long long paddr;
81 unsigned long size;
82 loff_t offset;
83};
84
85#ifdef CONFIG_PROC_FS
86
87extern struct proc_dir_entry proc_root;
88extern struct proc_dir_entry *proc_root_fs;
89extern struct proc_dir_entry *proc_net;
90extern struct proc_dir_entry *proc_net_stat;
91extern struct proc_dir_entry *proc_bus;
92extern struct proc_dir_entry *proc_root_driver;
93extern struct proc_dir_entry *proc_root_kcore;
94
95extern void proc_root_init(void);
96extern void proc_misc_init(void);
97
98struct mm_struct;
99
100struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
101struct dentry *proc_pid_unhash(struct task_struct *p);
102void proc_pid_flush(struct dentry *proc_dentry);
103int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
104unsigned long task_vsize(struct mm_struct *);
105int task_statm(struct mm_struct *, int *, int *, int *, int *);
106char *task_mem(struct mm_struct *, char *);
107
108extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
109 struct proc_dir_entry *parent);
110extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
111
112extern struct vfsmount *proc_mnt;
113extern int proc_fill_super(struct super_block *,void *,int);
114extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
115
116extern int proc_match(int, const char *,struct proc_dir_entry *);
117
118/*
119 * These are generic /proc routines that use the internal
120 * "struct proc_dir_entry" tree to traverse the filesystem.
121 *
122 * The /proc root directory has extended versions to take care
123 * of the /proc/<pid> subdirectories.
124 */
125extern int proc_readdir(struct file *, void *, filldir_t);
126extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
127
128extern struct file_operations proc_kcore_operations;
129extern struct file_operations proc_kmsg_operations;
130extern struct file_operations ppc_htab_operations;
131
132/*
133 * proc_tty.c
134 */
135struct tty_driver;
136extern void proc_tty_init(void);
137extern void proc_tty_register_driver(struct tty_driver *driver);
138extern void proc_tty_unregister_driver(struct tty_driver *driver);
139
140/*
141 * proc_devtree.c
142 */
143#ifdef CONFIG_PROC_DEVICETREE
144struct device_node;
145struct property;
146extern void proc_device_tree_init(void);
147extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
148extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
149extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
150 struct property *prop);
151extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
152 struct property *newprop,
153 struct property *oldprop);
154#endif /* CONFIG_PROC_DEVICETREE */
155
156extern struct proc_dir_entry *proc_symlink(const char *,
157 struct proc_dir_entry *, const char *);
158extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
159extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
160 struct proc_dir_entry *parent);
161
162static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
163 mode_t mode, struct proc_dir_entry *base,
164 read_proc_t *read_proc, void * data)
165{
166 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
167 if (res) {
168 res->read_proc=read_proc;
169 res->data=data;
170 }
171 return res;
172}
173
174static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
175 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
176{
177 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
178 if (res) res->get_info=get_info;
179 return res;
180}
181
182static inline struct proc_dir_entry *proc_net_create(const char *name,
183 mode_t mode, get_info_t *get_info)
184{
185 return create_proc_info_entry(name,mode,proc_net,get_info);
186}
187
188static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
189 mode_t mode, struct file_operations *fops)
190{
191 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
192 if (res)
193 res->proc_fops = fops;
194 return res;
195}
196
197static inline void proc_net_remove(const char *name)
198{
199 remove_proc_entry(name,proc_net);
200}
201
202#else
203
204#define proc_root_driver NULL
205#define proc_net NULL
206#define proc_bus NULL
207
208#define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
209#define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
210static inline void proc_net_remove(const char *name) {}
211
212static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }
213static inline void proc_pid_flush(struct dentry *proc_dentry) { }
214
215static inline struct proc_dir_entry *create_proc_entry(const char *name,
216 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
217
218#define remove_proc_entry(name, parent) do {} while (0)
219
220static inline struct proc_dir_entry *proc_symlink(const char *name,
221 struct proc_dir_entry *parent,const char *dest) {return NULL;}
222static inline struct proc_dir_entry *proc_mkdir(const char *name,
223 struct proc_dir_entry *parent) {return NULL;}
224
225static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
226 mode_t mode, struct proc_dir_entry *base,
227 read_proc_t *read_proc, void * data) { return NULL; }
228static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
229 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
230 { return NULL; }
231
232struct tty_driver;
233static inline void proc_tty_register_driver(struct tty_driver *driver) {};
234static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
235
236extern struct proc_dir_entry proc_root;
237
238#endif /* CONFIG_PROC_FS */
239
240#if !defined(CONFIG_PROC_KCORE)
241static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
242{
243}
244#else
245extern void kclist_add(struct kcore_list *, void *, size_t);
246#endif
247
248struct proc_inode {
249 struct task_struct *task;
250 int type;
251 union {
252 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
253 int (*proc_read)(struct task_struct *task, char *page);
254 } op;
255 struct proc_dir_entry *pde;
256 struct inode vfs_inode;
257};
258
259static inline struct proc_inode *PROC_I(const struct inode *inode)
260{
261 return container_of(inode, struct proc_inode, vfs_inode);
262}
263
264static inline struct proc_dir_entry *PDE(const struct inode *inode)
265{
266 return PROC_I(inode)->pde;
267}
268
269#endif /* _LINUX_PROC_FS_H */