1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
3
4 #include <linux/config.h>
5 #include <linux/malloc.h>
6
7 /*
8 * The proc filesystem constants/structures
9 */
10
11 /*
12 * Offset of the first process in the /proc root directory..
13 */
14 #define FIRST_PROCESS_ENTRY 256
15
16
17 /*
18 * We always define these enumerators
19 */
20
21 enum {
22 PROC_ROOT_INO = 1,
23 };
24
25 /* Finally, the dynamically allocatable proc entries are reserved: */
26
27 #define PROC_DYNAMIC_FIRST 4096
28 #define PROC_NDYNAMIC 4096
29
30 #define PROC_SUPER_MAGIC 0x9fa0
31
32 /*
33 * This is not completely implemented yet. The idea is to
34 * create an in-memory tree (like the actual /proc filesystem
35 * tree) of these proc_dir_entries, so that we can dynamically
36 * add new files to /proc.
37 *
38 * The "next" pointer creates a linked list of one /proc directory,
39 * while parent/subdir create the directory structure (every
40 * /proc file has a parent, but "subdir" is NULL for all
41 * non-directory entries).
42 *
43 * "get_info" is called at "read", while "owner" is used to protect module
44 * from unloading while proc_dir_entry is in use
45 */
46
47 typedef int (read_proc_t)(char *page, char **start, off_t off,
48 int count, int *eof, void *data);
49 typedef int (write_proc_t)(struct file *file, const char *buffer,
50 unsigned long count, void *data);
51 typedef int (get_info_t)(char *, char **, off_t, int);
52
53 struct proc_dir_entry {
54 unsigned short low_ino;
55 unsigned short namelen;
56 const char *name;
57 mode_t mode;
58 nlink_t nlink;
59 uid_t uid;
60 gid_t gid;
61 unsigned long size;
62 struct inode_operations * proc_iops;
63 struct file_operations * proc_fops;
64 get_info_t *get_info;
65 struct module *owner;
66 struct proc_dir_entry *next, *parent, *subdir;
67 void *data;
68 read_proc_t *read_proc;
69 write_proc_t *write_proc;
70 atomic_t count; /* use count */
71 int deleted; /* delete flag */
72 kdev_t rdev;
73 };
74
75 #define PROC_INODE_PROPER(inode) ((inode)->i_ino & ~0xffff)
76
77 #ifdef CONFIG_PROC_FS
78
79 extern struct proc_dir_entry proc_root;
80 extern struct proc_dir_entry *proc_root_fs;
81 extern struct proc_dir_entry *proc_net;
82 extern struct proc_dir_entry *proc_bus;
83 extern struct proc_dir_entry *proc_root_driver;
84 extern struct proc_dir_entry *proc_root_kcore;
85
86 extern void proc_root_init(void);
87 extern void proc_misc_init(void);
88
89 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry);
90 void proc_pid_delete_inode(struct inode *inode);
91 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
92
93 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
94 struct proc_dir_entry *parent);
95 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
96
97 extern struct vfsmount *proc_mnt;
98 extern struct super_block *proc_read_super(struct super_block *,void *,int);
99 extern struct inode * proc_get_inode(struct super_block *, int, struct proc_dir_entry *);
100
101 extern int proc_match(int, const char *,struct proc_dir_entry *);
102
103 /*
104 * These are generic /proc routines that use the internal
105 * "struct proc_dir_entry" tree to traverse the filesystem.
106 *
107 * The /proc root directory has extended versions to take care
108 * of the /proc/<pid> subdirectories.
109 */
110 extern int proc_readdir(struct file *, void *, filldir_t);
111 extern struct dentry *proc_lookup(struct inode *, struct dentry *);
112
113 extern struct file_operations proc_kcore_operations;
114 extern struct file_operations proc_kmsg_operations;
115 extern struct file_operations ppc_htab_operations;
116
117 /*
118 * proc_tty.c
119 */
120 extern void proc_tty_init(void);
121 extern void proc_tty_register_driver(struct tty_driver *driver);
122 extern void proc_tty_unregister_driver(struct tty_driver *driver);
123
124 /*
125 * proc_devtree.c
126 */
127 extern void proc_device_tree_init(void);
128
129 extern struct proc_dir_entry *proc_symlink(const char *,
130 struct proc_dir_entry *, const char *);
131 extern struct proc_dir_entry *proc_mknod(const char *,mode_t,
132 struct proc_dir_entry *,kdev_t);
133 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
134
135 extern inline struct proc_dir_entry *create_proc_read_entry(const char *name,
136 mode_t mode, struct proc_dir_entry *base,
137 read_proc_t *read_proc, void * data)
138 {
139 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
140 if (res) {
141 res->read_proc=read_proc;
142 res->data=data;
143 }
144 return res;
145 }
146
147 extern inline struct proc_dir_entry *create_proc_info_entry(const char *name,
148 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
149 {
150 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
151 if (res) res->get_info=get_info;
152 return res;
153 }
154
155 extern inline struct proc_dir_entry *proc_net_create(const char *name,
156 mode_t mode, get_info_t *get_info)
157 {
158 return create_proc_info_entry(name,mode,proc_net,get_info);
159 }
160
161 extern inline void proc_net_remove(const char *name)
162 {
163 remove_proc_entry(name,proc_net);
164 }
165
166 #else
167
168 extern inline struct proc_dir_entry *proc_net_create(const char *name, mode_t mode,
169 get_info_t *get_info) {return NULL;}
170 extern inline void proc_net_remove(const char *name) {}
171
172 extern inline struct proc_dir_entry *create_proc_entry(const char *name,
173 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
174
175 extern inline void remove_proc_entry(const char *name, struct proc_dir_entry *parent) {};
176 extern inline struct proc_dir_entry *proc_symlink(const char *name,
177 struct proc_dir_entry *parent,char *dest) {return NULL;}
178 extern inline struct proc_dir_entry *proc_mknod(const char *name,mode_t mode,
179 struct proc_dir_entry *parent,kdev_t rdev) {return NULL;}
180 extern inline struct proc_dir_entry *proc_mkdir(const char *name,
181 struct proc_dir_entry *parent) {return NULL;}
182
183 extern inline struct proc_dir_entry *create_proc_read_entry(const char *name,
184 mode_t mode, struct proc_dir_entry *base,
185 int (*read_proc)(char *, char **, off_t, int, int *, void *),
186 void * data) { return NULL; }
187 extern inline struct proc_dir_entry *create_proc_info_entry(const char *name,
188 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
189 { return NULL; }
190
191 extern inline void proc_tty_register_driver(struct tty_driver *driver) {};
192 extern inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
193
194 extern struct proc_dir_entry proc_root;
195
196 #endif /* CONFIG_PROC_FS */
197
198 #endif /* _LINUX_PROC_FS_H */
199
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