1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
3
4 #include <linux/slab.h>
5 #include <linux/fs.h>
6 #include <linux/spinlock.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
23 enum {
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
44 typedef int (read_proc_t)(char *page, char **start, off_t off,
45 int count, int *eof, void *data);
46 typedef int (write_proc_t)(struct file *file, const char __user *buffer,
47 unsigned long count, void *data);
48 typedef int (get_info_t)(char *, char **, off_t, int);
49
50 struct 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 loff_t size;
59 struct inode_operations * proc_iops;
60 const 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
72 struct kcore_list {
73 struct kcore_list *next;
74 unsigned long addr;
75 size_t size;
76 };
77
78 struct vmcore {
79 struct list_head list;
80 unsigned long long paddr;
81 unsigned long long size;
82 loff_t offset;
83 };
84
85 #ifdef CONFIG_PROC_FS
86
87 extern struct proc_dir_entry proc_root;
88 extern struct proc_dir_entry *proc_root_fs;
89 extern struct proc_dir_entry *proc_net;
90 extern struct proc_dir_entry *proc_net_stat;
91 extern struct proc_dir_entry *proc_bus;
92 extern struct proc_dir_entry *proc_root_driver;
93 extern struct proc_dir_entry *proc_root_kcore;
94
95 extern spinlock_t proc_subdir_lock;
96
97 extern void proc_root_init(void);
98 extern void proc_misc_init(void);
99
100 struct mm_struct;
101
102 void proc_flush_task(struct task_struct *task);
103 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
104 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
105 unsigned long task_vsize(struct mm_struct *);
106 int task_statm(struct mm_struct *, int *, int *, int *, int *);
107 char *task_mem(struct mm_struct *, char *);
108
109 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
110 struct proc_dir_entry *parent);
111 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
112
113 extern struct vfsmount *proc_mnt;
114 extern int proc_fill_super(struct super_block *,void *,int);
115 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
116
117 extern int proc_match(int, const char *,struct proc_dir_entry *);
118
119 /*
120 * These are generic /proc routines that use the internal
121 * "struct proc_dir_entry" tree to traverse the filesystem.
122 *
123 * The /proc root directory has extended versions to take care
124 * of the /proc/<pid> subdirectories.
125 */
126 extern int proc_readdir(struct file *, void *, filldir_t);
127 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
128
129 extern const struct file_operations proc_kcore_operations;
130 extern const struct file_operations proc_kmsg_operations;
131 extern const struct file_operations ppc_htab_operations;
132
133 /*
134 * proc_tty.c
135 */
136 struct tty_driver;
137 extern void proc_tty_init(void);
138 extern void proc_tty_register_driver(struct tty_driver *driver);
139 extern void proc_tty_unregister_driver(struct tty_driver *driver);
140
141 /*
142 * proc_devtree.c
143 */
144 #ifdef CONFIG_PROC_DEVICETREE
145 struct device_node;
146 struct property;
147 extern void proc_device_tree_init(void);
148 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
149 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
150 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
151 struct property *prop);
152 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
153 struct property *newprop,
154 struct property *oldprop);
155 #endif /* CONFIG_PROC_DEVICETREE */
156
157 extern struct proc_dir_entry *proc_symlink(const char *,
158 struct proc_dir_entry *, const char *);
159 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
160 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
161 struct proc_dir_entry *parent);
162
create_proc_read_entry(const char * name,mode_t mode,struct proc_dir_entry * base,read_proc_t * read_proc,void * data)163 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
164 mode_t mode, struct proc_dir_entry *base,
165 read_proc_t *read_proc, void * data)
166 {
167 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
168 if (res) {
169 res->read_proc=read_proc;
170 res->data=data;
171 }
172 return res;
173 }
174
create_proc_info_entry(const char * name,mode_t mode,struct proc_dir_entry * base,get_info_t * get_info)175 static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
176 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
177 {
178 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
179 if (res) res->get_info=get_info;
180 return res;
181 }
182
proc_net_create(const char * name,mode_t mode,get_info_t * get_info)183 static inline struct proc_dir_entry *proc_net_create(const char *name,
184 mode_t mode, get_info_t *get_info)
185 {
186 return create_proc_info_entry(name,mode,proc_net,get_info);
187 }
188
proc_net_fops_create(const char * name,mode_t mode,const struct file_operations * fops)189 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
190 mode_t mode, const struct file_operations *fops)
191 {
192 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
193 if (res)
194 res->proc_fops = fops;
195 return res;
196 }
197
proc_net_remove(const char * name)198 static inline void proc_net_remove(const char *name)
199 {
200 remove_proc_entry(name,proc_net);
201 }
202
203 #else
204
205 #define proc_root_driver NULL
206 #define proc_net NULL
207 #define proc_bus NULL
208
209 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
210 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
proc_net_remove(const char * name)211 static inline void proc_net_remove(const char *name) {}
212
proc_flush_task(struct task_struct * task)213 static inline void proc_flush_task(struct task_struct *task) { }
214
create_proc_entry(const char * name,mode_t mode,struct proc_dir_entry * parent)215 static 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
proc_symlink(const char * name,struct proc_dir_entry * parent,const char * dest)220 static inline struct proc_dir_entry *proc_symlink(const char *name,
221 struct proc_dir_entry *parent,const char *dest) {return NULL;}
proc_mkdir(const char * name,struct proc_dir_entry * parent)222 static inline struct proc_dir_entry *proc_mkdir(const char *name,
223 struct proc_dir_entry *parent) {return NULL;}
224
create_proc_read_entry(const char * name,mode_t mode,struct proc_dir_entry * base,read_proc_t * read_proc,void * data)225 static 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; }
create_proc_info_entry(const char * name,mode_t mode,struct proc_dir_entry * base,get_info_t * get_info)228 static 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
232 struct tty_driver;
proc_tty_register_driver(struct tty_driver * driver)233 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
proc_tty_unregister_driver(struct tty_driver * driver)234 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
235
236 extern struct proc_dir_entry proc_root;
237
238 #endif /* CONFIG_PROC_FS */
239
240 #if !defined(CONFIG_PROC_KCORE)
kclist_add(struct kcore_list * new,void * addr,size_t size)241 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
242 {
243 }
244 #else
245 extern void kclist_add(struct kcore_list *, void *, size_t);
246 #endif
247
248 struct proc_inode {
249 struct pid *pid;
250 int fd;
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
PROC_I(const struct inode * inode)259 static inline struct proc_inode *PROC_I(const struct inode *inode)
260 {
261 return container_of(inode, struct proc_inode, vfs_inode);
262 }
263
PDE(const struct inode * inode)264 static inline struct proc_dir_entry *PDE(const struct inode *inode)
265 {
266 return PROC_I(inode)->pde;
267 }
268
269 struct proc_maps_private {
270 struct pid *pid;
271 struct task_struct *task;
272 struct vm_area_struct *tail_vma;
273 };
274
275 #endif /* _LINUX_PROC_FS_H */
276