Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_PROC_FS_H |
2 | #define _LINUX_PROC_FS_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/slab.h> |
5 | #include <linux/fs.h> | |
64a07bd8 | 6 | #include <linux/spinlock.h> |
e18fa700 | 7 | #include <linux/magic.h> |
60063497 | 8 | #include <linux/atomic.h> |
1da177e4 | 9 | |
457c4cbc | 10 | struct net; |
786d7e16 | 11 | struct completion; |
57d3c64f BN |
12 | struct mm_struct; |
13 | ||
1da177e4 LT |
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 | ||
f248dcb3 MM |
23 | /* Worst case buffer size needed for holding an integer. */ |
24 | #define PROC_NUMBUF 13 | |
1da177e4 LT |
25 | |
26 | /* | |
27 | * We always define these enumerators | |
28 | */ | |
29 | ||
30 | enum { | |
98f842e6 EB |
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, | |
1da177e4 LT |
36 | }; |
37 | ||
1da177e4 LT |
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). | |
1da177e4 LT |
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); | |
1da177e4 LT |
54 | |
55 | struct proc_dir_entry { | |
56 | unsigned int low_ino; | |
d161a13f | 57 | umode_t mode; |
1da177e4 | 58 | nlink_t nlink; |
dcb0f222 EB |
59 | kuid_t uid; |
60 | kgid_t gid; | |
22e6c1b3 | 61 | loff_t size; |
c5ef1c42 | 62 | const struct inode_operations *proc_iops; |
786d7e16 AD |
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 | */ | |
c5ef1c42 | 71 | const struct file_operations *proc_fops; |
1da177e4 LT |
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 */ | |
786d7e16 | 77 | int pde_users; /* number of callers into module in progress */ |
786d7e16 | 78 | struct completion *pde_unload_completion; |
881adb85 | 79 | struct list_head pde_openers; /* who did ->open, but not ->release */ |
09570f91 DH |
80 | spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */ |
81 | u8 namelen; | |
82 | char name[]; | |
1da177e4 LT |
83 | }; |
84 | ||
c30bb2a2 KH |
85 | enum kcore_type { |
86 | KCORE_TEXT, | |
87 | KCORE_VMALLOC, | |
88 | KCORE_RAM, | |
26562c59 | 89 | KCORE_VMEMMAP, |
c30bb2a2 KH |
90 | KCORE_OTHER, |
91 | }; | |
92 | ||
1da177e4 | 93 | struct kcore_list { |
2ef43ec7 | 94 | struct list_head list; |
1da177e4 LT |
95 | unsigned long addr; |
96 | size_t size; | |
c30bb2a2 | 97 | int type; |
1da177e4 LT |
98 | }; |
99 | ||
666bfddb VG |
100 | struct vmcore { |
101 | struct list_head list; | |
102 | unsigned long long paddr; | |
80e8ff63 | 103 | unsigned long long size; |
666bfddb VG |
104 | loff_t offset; |
105 | }; | |
106 | ||
1da177e4 LT |
107 | #ifdef CONFIG_PROC_FS |
108 | ||
1da177e4 | 109 | extern void proc_root_init(void); |
1da177e4 | 110 | |
48e6484d | 111 | void proc_flush_task(struct task_struct *task); |
7695650a | 112 | |
d161a13f | 113 | extern struct proc_dir_entry *create_proc_entry(const char *name, umode_t mode, |
1da177e4 | 114 | struct proc_dir_entry *parent); |
d161a13f | 115 | struct proc_dir_entry *proc_create_data(const char *name, umode_t mode, |
2d3a4e36 | 116 | struct proc_dir_entry *parent, |
59b74351 DL |
117 | const struct file_operations *proc_fops, |
118 | void *data); | |
1da177e4 LT |
119 | extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); |
120 | ||
07543f5c | 121 | struct pid_namespace; |
1da177e4 | 122 | |
6f4e6433 PE |
123 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); |
124 | extern void pid_ns_release_proc(struct pid_namespace *ns); | |
125 | ||
1da177e4 LT |
126 | /* |
127 | * proc_tty.c | |
128 | */ | |
129 | struct tty_driver; | |
4f73bc4d | 130 | #ifdef CONFIG_TTY |
1da177e4 | 131 | extern void proc_tty_init(void); |
4f73bc4d JM |
132 | #else |
133 | static inline void proc_tty_init(void) | |
134 | { } | |
135 | #endif | |
1da177e4 LT |
136 | extern void proc_tty_register_driver(struct tty_driver *driver); |
137 | extern void proc_tty_unregister_driver(struct tty_driver *driver); | |
138 | ||
139 | /* | |
140 | * proc_devtree.c | |
141 | */ | |
183d0202 | 142 | #ifdef CONFIG_PROC_DEVICETREE |
1da177e4 | 143 | struct device_node; |
183d0202 | 144 | struct property; |
1da177e4 | 145 | extern void proc_device_tree_init(void); |
1da177e4 | 146 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); |
183d0202 | 147 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); |
898b5395 DB |
148 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, |
149 | struct property *prop); | |
150 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
151 | struct property *newprop, | |
152 | struct property *oldprop); | |
1da177e4 LT |
153 | #endif /* CONFIG_PROC_DEVICETREE */ |
154 | ||
155 | extern struct proc_dir_entry *proc_symlink(const char *, | |
156 | struct proc_dir_entry *, const char *); | |
157 | extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); | |
d161a13f | 158 | extern struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode, |
1da177e4 LT |
159 | struct proc_dir_entry *parent); |
160 | ||
d161a13f | 161 | static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode, |
59b74351 DL |
162 | struct proc_dir_entry *parent, const struct file_operations *proc_fops) |
163 | { | |
164 | return proc_create_data(name, mode, parent, proc_fops, NULL); | |
165 | } | |
166 | ||
1da177e4 | 167 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, |
d161a13f | 168 | umode_t mode, struct proc_dir_entry *base, |
1da177e4 LT |
169 | read_proc_t *read_proc, void * data) |
170 | { | |
171 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
172 | if (res) { | |
173 | res->read_proc=read_proc; | |
174 | res->data=data; | |
175 | } | |
176 | return res; | |
177 | } | |
178 | ||
e5d69b9f DL |
179 | extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name, |
180 | struct proc_dir_entry *parent); | |
1da177e4 | 181 | |
6b4e306a | 182 | extern struct file *proc_ns_fget(int fd); |
8823c079 | 183 | extern bool proc_ns_inode(struct inode *inode); |
6b4e306a | 184 | |
33d6dce6 EB |
185 | extern int proc_alloc_inum(unsigned int *pino); |
186 | extern void proc_free_inum(unsigned int inum); | |
1da177e4 LT |
187 | #else |
188 | ||
60347f67 PE |
189 | static inline void proc_flush_task(struct task_struct *task) |
190 | { | |
191 | } | |
1da177e4 LT |
192 | |
193 | static inline struct proc_dir_entry *create_proc_entry(const char *name, | |
d161a13f | 194 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
4fc1a601 G |
195 | |
196 | #define proc_create(name, mode, parent, fops) ({ (void)(mode), NULL; }) | |
197 | ||
59b74351 | 198 | static inline struct proc_dir_entry *proc_create_data(const char *name, |
d161a13f | 199 | umode_t mode, struct proc_dir_entry *parent, |
59b74351 DL |
200 | const struct file_operations *proc_fops, void *data) |
201 | { | |
202 | return NULL; | |
203 | } | |
1da177e4 LT |
204 | #define remove_proc_entry(name, parent) do {} while (0) |
205 | ||
206 | static inline struct proc_dir_entry *proc_symlink(const char *name, | |
207 | struct proc_dir_entry *parent,const char *dest) {return NULL;} | |
208 | static inline struct proc_dir_entry *proc_mkdir(const char *name, | |
209 | struct proc_dir_entry *parent) {return NULL;} | |
f12a20fc | 210 | static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, |
d161a13f | 211 | umode_t mode, struct proc_dir_entry *parent) { return NULL; } |
1da177e4 LT |
212 | |
213 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, | |
d161a13f | 214 | umode_t mode, struct proc_dir_entry *base, |
1da177e4 | 215 | read_proc_t *read_proc, void * data) { return NULL; } |
1da177e4 LT |
216 | |
217 | struct tty_driver; | |
218 | static inline void proc_tty_register_driver(struct tty_driver *driver) {}; | |
219 | static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; | |
220 | ||
6f4e6433 PE |
221 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) |
222 | { | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static inline void pid_ns_release_proc(struct pid_namespace *ns) | |
227 | { | |
228 | } | |
229 | ||
6b4e306a EB |
230 | static inline struct file *proc_ns_fget(int fd) |
231 | { | |
232 | return ERR_PTR(-EINVAL); | |
233 | } | |
234 | ||
8823c079 EB |
235 | static inline bool proc_ns_inode(struct inode *inode) |
236 | { | |
237 | return false; | |
238 | } | |
239 | ||
33d6dce6 EB |
240 | static inline int proc_alloc_inum(unsigned int *inum) |
241 | { | |
242 | *inum = 1; | |
243 | return 0; | |
244 | } | |
245 | static inline void proc_free_inum(unsigned int inum) | |
246 | { | |
247 | } | |
1da177e4 LT |
248 | #endif /* CONFIG_PROC_FS */ |
249 | ||
250 | #if !defined(CONFIG_PROC_KCORE) | |
c30bb2a2 KH |
251 | static inline void |
252 | kclist_add(struct kcore_list *new, void *addr, size_t size, int type) | |
1da177e4 LT |
253 | { |
254 | } | |
255 | #else | |
c30bb2a2 | 256 | extern void kclist_add(struct kcore_list *, void *, size_t, int type); |
1da177e4 LT |
257 | #endif |
258 | ||
6b4e306a EB |
259 | struct nsproxy; |
260 | struct proc_ns_operations { | |
261 | const char *name; | |
262 | int type; | |
263 | void *(*get)(struct task_struct *task); | |
264 | void (*put)(void *ns); | |
265 | int (*install)(struct nsproxy *nsproxy, void *ns); | |
98f842e6 | 266 | unsigned int (*inum)(void *ns); |
6b4e306a | 267 | }; |
13b6f576 | 268 | extern const struct proc_ns_operations netns_operations; |
34482e89 | 269 | extern const struct proc_ns_operations utsns_operations; |
a00eaf11 | 270 | extern const struct proc_ns_operations ipcns_operations; |
57e8391d | 271 | extern const struct proc_ns_operations pidns_operations; |
cde1975b | 272 | extern const struct proc_ns_operations userns_operations; |
8823c079 | 273 | extern const struct proc_ns_operations mntns_operations; |
6b4e306a | 274 | |
20cdc894 | 275 | union proc_op { |
7773fbc5 | 276 | int (*proc_get_link)(struct dentry *, struct path *); |
20cdc894 | 277 | int (*proc_read)(struct task_struct *task, char *page); |
be614086 EB |
278 | int (*proc_show)(struct seq_file *m, |
279 | struct pid_namespace *ns, struct pid *pid, | |
280 | struct task_struct *task); | |
20cdc894 EB |
281 | }; |
282 | ||
9043476f AV |
283 | struct ctl_table_header; |
284 | struct ctl_table; | |
285 | ||
1da177e4 | 286 | struct proc_inode { |
13b41b09 | 287 | struct pid *pid; |
aed7a6c4 | 288 | int fd; |
20cdc894 | 289 | union proc_op op; |
1da177e4 | 290 | struct proc_dir_entry *pde; |
9043476f AV |
291 | struct ctl_table_header *sysctl; |
292 | struct ctl_table *sysctl_entry; | |
6b4e306a EB |
293 | void *ns; |
294 | const struct proc_ns_operations *ns_ops; | |
1da177e4 LT |
295 | struct inode vfs_inode; |
296 | }; | |
297 | ||
298 | static inline struct proc_inode *PROC_I(const struct inode *inode) | |
299 | { | |
300 | return container_of(inode, struct proc_inode, vfs_inode); | |
301 | } | |
302 | ||
303 | static inline struct proc_dir_entry *PDE(const struct inode *inode) | |
304 | { | |
305 | return PROC_I(inode)->pde; | |
306 | } | |
307 | ||
457c4cbc EB |
308 | static inline struct net *PDE_NET(struct proc_dir_entry *pde) |
309 | { | |
310 | return pde->parent->data; | |
311 | } | |
312 | ||
138d22b5 CG |
313 | #include <linux/signal.h> |
314 | ||
315 | void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set); | |
1da177e4 | 316 | #endif /* _LINUX_PROC_FS_H */ |