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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 <linux/magic.h> |
8 | #include <linux/atomic.h> |
9 | |
10 | struct net; |
11 | struct completion; |
12 | struct mm_struct; |
13 | |
14 | /* |
15 | * The proc filesystem constants/structures |
16 | */ |
17 | |
18 | /* |
19 | * Offset of the first process in the /proc root directory.. |
20 | */ |
21 | #define FIRST_PROCESS_ENTRY 256 |
22 | |
23 | /* Worst case buffer size needed for holding an integer. */ |
24 | #define PROC_NUMBUF 13 |
25 | |
26 | /* |
27 | * We always define these enumerators |
28 | */ |
29 | |
30 | enum { |
31 | PROC_ROOT_INO = 1, |
32 | PROC_IPC_INIT_INO = 0xEFFFFFFFU, |
33 | PROC_UTS_INIT_INO = 0xEFFFFFFEU, |
34 | PROC_USER_INIT_INO = 0xEFFFFFFDU, |
35 | PROC_PID_INIT_INO = 0xEFFFFFFCU, |
36 | }; |
37 | |
38 | /* |
39 | * This is not completely implemented yet. The idea is to |
40 | * create an in-memory tree (like the actual /proc filesystem |
41 | * tree) of these proc_dir_entries, so that we can dynamically |
42 | * add new files to /proc. |
43 | * |
44 | * The "next" pointer creates a linked list of one /proc directory, |
45 | * while parent/subdir create the directory structure (every |
46 | * /proc file has a parent, but "subdir" is NULL for all |
47 | * non-directory entries). |
48 | */ |
49 | |
50 | typedef int (read_proc_t)(char *page, char **start, off_t off, |
51 | int count, int *eof, void *data); |
52 | typedef int (write_proc_t)(struct file *file, const char __user *buffer, |
53 | unsigned long count, void *data); |
54 | |
55 | struct proc_dir_entry { |
56 | unsigned int low_ino; |
57 | umode_t mode; |
58 | nlink_t nlink; |
59 | kuid_t uid; |
60 | kgid_t gid; |
61 | loff_t size; |
62 | const struct inode_operations *proc_iops; |
63 | /* |
64 | * NULL ->proc_fops means "PDE is going away RSN" or |
65 | * "PDE is just created". In either case, e.g. ->read_proc won't be |
66 | * called because it's too late or too early, respectively. |
67 | * |
68 | * If you're allocating ->proc_fops dynamically, save a pointer |
69 | * somewhere. |
70 | */ |
71 | const struct file_operations *proc_fops; |
72 | struct proc_dir_entry *next, *parent, *subdir; |
73 | void *data; |
74 | read_proc_t *read_proc; |
75 | write_proc_t *write_proc; |
76 | atomic_t count; /* use count */ |
77 | int pde_users; /* number of callers into module in progress */ |
78 | struct completion *pde_unload_completion; |
79 | struct list_head pde_openers; /* who did ->open, but not ->release */ |
80 | spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */ |
81 | u8 namelen; |
82 | char name[]; |
83 | }; |
84 | |
85 | enum kcore_type { |
86 | KCORE_TEXT, |
87 | KCORE_VMALLOC, |
88 | KCORE_RAM, |
89 | KCORE_VMEMMAP, |
90 | KCORE_OTHER, |
91 | }; |
92 | |
93 | struct kcore_list { |
94 | struct list_head list; |
95 | unsigned long addr; |
96 | size_t size; |
97 | int type; |
98 | }; |
99 | |
100 | struct vmcore { |
101 | struct list_head list; |
102 | unsigned long long paddr; |
103 | unsigned long long size; |
104 | loff_t offset; |
105 | }; |
106 | |
107 | #ifdef CONFIG_PROC_FS |
108 | |
109 | extern void proc_root_init(void); |
110 | |
111 | void proc_flush_task(struct task_struct *task); |
112 | |
113 | extern struct proc_dir_entry *create_proc_entry(const char *name, umode_t mode, |
114 | struct proc_dir_entry *parent); |
115 | struct proc_dir_entry *proc_create_data(const char *name, umode_t mode, |
116 | struct proc_dir_entry *parent, |
117 | const struct file_operations *proc_fops, |
118 | void *data); |
119 | extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); |
120 | extern int remove_proc_subtree(const char *name, struct proc_dir_entry *parent); |
121 | |
122 | struct pid_namespace; |
123 | |
124 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); |
125 | extern void pid_ns_release_proc(struct pid_namespace *ns); |
126 | |
127 | /* |
128 | * proc_tty.c |
129 | */ |
130 | struct tty_driver; |
131 | #ifdef CONFIG_TTY |
132 | extern void proc_tty_init(void); |
133 | #else |
134 | static inline void proc_tty_init(void) |
135 | { } |
136 | #endif |
137 | extern void proc_tty_register_driver(struct tty_driver *driver); |
138 | extern void proc_tty_unregister_driver(struct tty_driver *driver); |
139 | |
140 | /* |
141 | * proc_devtree.c |
142 | */ |
143 | #ifdef CONFIG_PROC_DEVICETREE |
144 | struct device_node; |
145 | struct property; |
146 | extern void proc_device_tree_init(void); |
147 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); |
148 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); |
149 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, |
150 | struct property *prop); |
151 | extern 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 | |
156 | extern struct proc_dir_entry *proc_symlink(const char *, |
157 | struct proc_dir_entry *, const char *); |
158 | extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); |
159 | extern struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode, |
160 | struct proc_dir_entry *parent); |
161 | |
162 | static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode, |
163 | struct proc_dir_entry *parent, const struct file_operations *proc_fops) |
164 | { |
165 | return proc_create_data(name, mode, parent, proc_fops, NULL); |
166 | } |
167 | |
168 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, |
169 | umode_t mode, struct proc_dir_entry *base, |
170 | read_proc_t *read_proc, void * data) |
171 | { |
172 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); |
173 | if (res) { |
174 | res->read_proc=read_proc; |
175 | res->data=data; |
176 | } |
177 | return res; |
178 | } |
179 | |
180 | extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name, |
181 | struct proc_dir_entry *parent); |
182 | |
183 | extern struct file *proc_ns_fget(int fd); |
184 | extern bool proc_ns_inode(struct inode *inode); |
185 | |
186 | extern int proc_alloc_inum(unsigned int *pino); |
187 | extern void proc_free_inum(unsigned int inum); |
188 | #else |
189 | |
190 | static inline void proc_flush_task(struct task_struct *task) |
191 | { |
192 | } |
193 | |
194 | static inline struct proc_dir_entry *create_proc_entry(const char *name, |
195 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
196 | |
197 | #define proc_create(name, mode, parent, fops) ({ (void)(mode), NULL; }) |
198 | |
199 | static inline struct proc_dir_entry *proc_create_data(const char *name, |
200 | umode_t mode, struct proc_dir_entry *parent, |
201 | const struct file_operations *proc_fops, void *data) |
202 | { |
203 | return NULL; |
204 | } |
205 | #define remove_proc_entry(name, parent) do {} while (0) |
206 | #define remove_proc_subtree(name, parent) do {} while (0) |
207 | |
208 | static inline struct proc_dir_entry *proc_symlink(const char *name, |
209 | struct proc_dir_entry *parent,const char *dest) {return NULL;} |
210 | static inline struct proc_dir_entry *proc_mkdir(const char *name, |
211 | struct proc_dir_entry *parent) {return NULL;} |
212 | static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, |
213 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
214 | |
215 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, |
216 | umode_t mode, struct proc_dir_entry *base, |
217 | read_proc_t *read_proc, void * data) { return NULL; } |
218 | |
219 | struct tty_driver; |
220 | static inline void proc_tty_register_driver(struct tty_driver *driver) {}; |
221 | static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; |
222 | |
223 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) |
224 | { |
225 | return 0; |
226 | } |
227 | |
228 | static inline void pid_ns_release_proc(struct pid_namespace *ns) |
229 | { |
230 | } |
231 | |
232 | static inline struct file *proc_ns_fget(int fd) |
233 | { |
234 | return ERR_PTR(-EINVAL); |
235 | } |
236 | |
237 | static inline bool proc_ns_inode(struct inode *inode) |
238 | { |
239 | return false; |
240 | } |
241 | |
242 | static inline int proc_alloc_inum(unsigned int *inum) |
243 | { |
244 | *inum = 1; |
245 | return 0; |
246 | } |
247 | static inline void proc_free_inum(unsigned int inum) |
248 | { |
249 | } |
250 | #endif /* CONFIG_PROC_FS */ |
251 | |
252 | #if !defined(CONFIG_PROC_KCORE) |
253 | static inline void |
254 | kclist_add(struct kcore_list *new, void *addr, size_t size, int type) |
255 | { |
256 | } |
257 | #else |
258 | extern void kclist_add(struct kcore_list *, void *, size_t, int type); |
259 | #endif |
260 | |
261 | struct nsproxy; |
262 | struct proc_ns_operations { |
263 | const char *name; |
264 | int type; |
265 | void *(*get)(struct task_struct *task); |
266 | void (*put)(void *ns); |
267 | int (*install)(struct nsproxy *nsproxy, void *ns); |
268 | unsigned int (*inum)(void *ns); |
269 | }; |
270 | extern const struct proc_ns_operations netns_operations; |
271 | extern const struct proc_ns_operations utsns_operations; |
272 | extern const struct proc_ns_operations ipcns_operations; |
273 | extern const struct proc_ns_operations pidns_operations; |
274 | extern const struct proc_ns_operations userns_operations; |
275 | extern const struct proc_ns_operations mntns_operations; |
276 | |
277 | union proc_op { |
278 | int (*proc_get_link)(struct dentry *, struct path *); |
279 | int (*proc_read)(struct task_struct *task, char *page); |
280 | int (*proc_show)(struct seq_file *m, |
281 | struct pid_namespace *ns, struct pid *pid, |
282 | struct task_struct *task); |
283 | }; |
284 | |
285 | struct ctl_table_header; |
286 | struct ctl_table; |
287 | |
288 | struct proc_inode { |
289 | struct pid *pid; |
290 | int fd; |
291 | union proc_op op; |
292 | struct proc_dir_entry *pde; |
293 | struct ctl_table_header *sysctl; |
294 | struct ctl_table *sysctl_entry; |
295 | void *ns; |
296 | const struct proc_ns_operations *ns_ops; |
297 | struct inode vfs_inode; |
298 | }; |
299 | |
300 | static inline struct proc_inode *PROC_I(const struct inode *inode) |
301 | { |
302 | return container_of(inode, struct proc_inode, vfs_inode); |
303 | } |
304 | |
305 | static inline struct proc_dir_entry *PDE(const struct inode *inode) |
306 | { |
307 | return PROC_I(inode)->pde; |
308 | } |
309 | |
310 | static inline struct net *PDE_NET(struct proc_dir_entry *pde) |
311 | { |
312 | return pde->parent->data; |
313 | } |
314 | |
315 | #include <linux/signal.h> |
316 | |
317 | void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set); |
318 | #endif /* _LINUX_PROC_FS_H */ |
319 |
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