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1da177e4 LT |
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> | |
64a07bd8 | 7 | #include <linux/spinlock.h> |
1da177e4 LT |
8 | #include <asm/atomic.h> |
9 | ||
10 | /* | |
11 | * The proc filesystem constants/structures | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Offset of the first process in the /proc root directory.. | |
16 | */ | |
17 | #define FIRST_PROCESS_ENTRY 256 | |
18 | ||
19 | ||
20 | /* | |
21 | * We always define these enumerators | |
22 | */ | |
23 | ||
24 | enum { | |
25 | PROC_ROOT_INO = 1, | |
26 | }; | |
27 | ||
28 | #define PROC_SUPER_MAGIC 0x9fa0 | |
29 | ||
30 | /* | |
31 | * This is not completely implemented yet. The idea is to | |
32 | * create an in-memory tree (like the actual /proc filesystem | |
33 | * tree) of these proc_dir_entries, so that we can dynamically | |
34 | * add new files to /proc. | |
35 | * | |
36 | * The "next" pointer creates a linked list of one /proc directory, | |
37 | * while parent/subdir create the directory structure (every | |
38 | * /proc file has a parent, but "subdir" is NULL for all | |
39 | * non-directory entries). | |
40 | * | |
41 | * "get_info" is called at "read", while "owner" is used to protect module | |
42 | * from unloading while proc_dir_entry is in use | |
43 | */ | |
44 | ||
45 | typedef int (read_proc_t)(char *page, char **start, off_t off, | |
46 | int count, int *eof, void *data); | |
47 | typedef int (write_proc_t)(struct file *file, const char __user *buffer, | |
48 | unsigned long count, void *data); | |
49 | typedef int (get_info_t)(char *, char **, off_t, int); | |
50 | ||
51 | struct proc_dir_entry { | |
52 | unsigned int low_ino; | |
53 | unsigned short namelen; | |
54 | const char *name; | |
55 | mode_t mode; | |
56 | nlink_t nlink; | |
57 | uid_t uid; | |
58 | gid_t gid; | |
22e6c1b3 | 59 | loff_t size; |
1da177e4 | 60 | struct inode_operations * proc_iops; |
99ac48f5 | 61 | const struct file_operations * proc_fops; |
1da177e4 LT |
62 | get_info_t *get_info; |
63 | struct module *owner; | |
64 | struct proc_dir_entry *next, *parent, *subdir; | |
65 | void *data; | |
66 | read_proc_t *read_proc; | |
67 | write_proc_t *write_proc; | |
68 | atomic_t count; /* use count */ | |
69 | int deleted; /* delete flag */ | |
330d57fb | 70 | void *set; |
1da177e4 LT |
71 | }; |
72 | ||
73 | struct kcore_list { | |
74 | struct kcore_list *next; | |
75 | unsigned long addr; | |
76 | size_t size; | |
77 | }; | |
78 | ||
666bfddb VG |
79 | struct vmcore { |
80 | struct list_head list; | |
81 | unsigned long long paddr; | |
82 | unsigned long size; | |
83 | loff_t offset; | |
84 | }; | |
85 | ||
1da177e4 LT |
86 | #ifdef CONFIG_PROC_FS |
87 | ||
88 | extern struct proc_dir_entry proc_root; | |
89 | extern struct proc_dir_entry *proc_root_fs; | |
90 | extern struct proc_dir_entry *proc_net; | |
91 | extern struct proc_dir_entry *proc_net_stat; | |
92 | extern struct proc_dir_entry *proc_bus; | |
93 | extern struct proc_dir_entry *proc_root_driver; | |
94 | extern struct proc_dir_entry *proc_root_kcore; | |
95 | ||
64a07bd8 SR |
96 | extern spinlock_t proc_subdir_lock; |
97 | ||
1da177e4 LT |
98 | extern void proc_root_init(void); |
99 | extern void proc_misc_init(void); | |
100 | ||
101 | struct mm_struct; | |
102 | ||
103 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); | |
104 | struct dentry *proc_pid_unhash(struct task_struct *p); | |
105 | void proc_pid_flush(struct dentry *proc_dentry); | |
106 | int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); | |
107 | unsigned long task_vsize(struct mm_struct *); | |
108 | int task_statm(struct mm_struct *, int *, int *, int *, int *); | |
109 | char *task_mem(struct mm_struct *, char *); | |
110 | ||
111 | extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, | |
112 | struct proc_dir_entry *parent); | |
113 | extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); | |
114 | ||
115 | extern struct vfsmount *proc_mnt; | |
116 | extern int proc_fill_super(struct super_block *,void *,int); | |
117 | extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); | |
118 | ||
119 | extern int proc_match(int, const char *,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 | */ | |
128 | extern int proc_readdir(struct file *, void *, filldir_t); | |
129 | extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); | |
130 | ||
4b6f5d20 AV |
131 | extern const struct file_operations proc_kcore_operations; |
132 | extern const struct file_operations proc_kmsg_operations; | |
133 | extern const struct file_operations ppc_htab_operations; | |
1da177e4 LT |
134 | |
135 | /* | |
136 | * proc_tty.c | |
137 | */ | |
138 | struct tty_driver; | |
139 | extern void proc_tty_init(void); | |
140 | extern void proc_tty_register_driver(struct tty_driver *driver); | |
141 | extern void proc_tty_unregister_driver(struct tty_driver *driver); | |
142 | ||
143 | /* | |
144 | * proc_devtree.c | |
145 | */ | |
183d0202 | 146 | #ifdef CONFIG_PROC_DEVICETREE |
1da177e4 | 147 | struct device_node; |
183d0202 | 148 | struct property; |
1da177e4 | 149 | extern void proc_device_tree_init(void); |
1da177e4 | 150 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); |
183d0202 | 151 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); |
898b5395 DB |
152 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, |
153 | struct property *prop); | |
154 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
155 | struct property *newprop, | |
156 | struct property *oldprop); | |
1da177e4 LT |
157 | #endif /* CONFIG_PROC_DEVICETREE */ |
158 | ||
159 | extern struct proc_dir_entry *proc_symlink(const char *, | |
160 | struct proc_dir_entry *, const char *); | |
161 | extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); | |
162 | extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, | |
163 | struct proc_dir_entry *parent); | |
164 | ||
165 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, | |
166 | mode_t mode, struct proc_dir_entry *base, | |
167 | read_proc_t *read_proc, void * data) | |
168 | { | |
169 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
170 | if (res) { | |
171 | res->read_proc=read_proc; | |
172 | res->data=data; | |
173 | } | |
174 | return res; | |
175 | } | |
176 | ||
177 | static inline struct proc_dir_entry *create_proc_info_entry(const char *name, | |
178 | mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) | |
179 | { | |
180 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
181 | if (res) res->get_info=get_info; | |
182 | return res; | |
183 | } | |
184 | ||
185 | static inline struct proc_dir_entry *proc_net_create(const char *name, | |
186 | mode_t mode, get_info_t *get_info) | |
187 | { | |
188 | return create_proc_info_entry(name,mode,proc_net,get_info); | |
189 | } | |
190 | ||
191 | static inline struct proc_dir_entry *proc_net_fops_create(const char *name, | |
99ac48f5 | 192 | mode_t mode, const struct file_operations *fops) |
1da177e4 LT |
193 | { |
194 | struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); | |
195 | if (res) | |
196 | res->proc_fops = fops; | |
197 | return res; | |
198 | } | |
199 | ||
200 | static inline void proc_net_remove(const char *name) | |
201 | { | |
202 | remove_proc_entry(name,proc_net); | |
203 | } | |
204 | ||
205 | #else | |
206 | ||
207 | #define proc_root_driver NULL | |
208 | #define proc_net NULL | |
209 | #define proc_bus NULL | |
210 | ||
211 | #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) | |
212 | #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) | |
213 | static inline void proc_net_remove(const char *name) {} | |
214 | ||
215 | static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; } | |
216 | static inline void proc_pid_flush(struct dentry *proc_dentry) { } | |
217 | ||
218 | static inline struct proc_dir_entry *create_proc_entry(const char *name, | |
219 | mode_t mode, struct proc_dir_entry *parent) { return NULL; } | |
220 | ||
221 | #define remove_proc_entry(name, parent) do {} while (0) | |
222 | ||
223 | static inline struct proc_dir_entry *proc_symlink(const char *name, | |
224 | struct proc_dir_entry *parent,const char *dest) {return NULL;} | |
225 | static inline struct proc_dir_entry *proc_mkdir(const char *name, | |
226 | struct proc_dir_entry *parent) {return NULL;} | |
227 | ||
228 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, | |
229 | mode_t mode, struct proc_dir_entry *base, | |
230 | read_proc_t *read_proc, void * data) { return NULL; } | |
231 | static inline struct proc_dir_entry *create_proc_info_entry(const char *name, | |
232 | mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) | |
233 | { return NULL; } | |
234 | ||
235 | struct tty_driver; | |
236 | static inline void proc_tty_register_driver(struct tty_driver *driver) {}; | |
237 | static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; | |
238 | ||
239 | extern struct proc_dir_entry proc_root; | |
240 | ||
241 | #endif /* CONFIG_PROC_FS */ | |
242 | ||
243 | #if !defined(CONFIG_PROC_KCORE) | |
244 | static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) | |
245 | { | |
246 | } | |
247 | #else | |
248 | extern void kclist_add(struct kcore_list *, void *, size_t); | |
249 | #endif | |
250 | ||
251 | struct proc_inode { | |
252 | struct task_struct *task; | |
253 | int type; | |
254 | union { | |
255 | int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); | |
256 | int (*proc_read)(struct task_struct *task, char *page); | |
257 | } op; | |
258 | struct proc_dir_entry *pde; | |
259 | struct inode vfs_inode; | |
260 | }; | |
261 | ||
262 | static inline struct proc_inode *PROC_I(const struct inode *inode) | |
263 | { | |
264 | return container_of(inode, struct proc_inode, vfs_inode); | |
265 | } | |
266 | ||
267 | static inline struct proc_dir_entry *PDE(const struct inode *inode) | |
268 | { | |
269 | return PROC_I(inode)->pde; | |
270 | } | |
271 | ||
272 | #endif /* _LINUX_PROC_FS_H */ |