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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> |
1da177e4 LT |
8 | #include <asm/atomic.h> |
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 { | |
31 | PROC_ROOT_INO = 1, | |
32 | }; | |
33 | ||
1da177e4 LT |
34 | /* |
35 | * This is not completely implemented yet. The idea is to | |
36 | * create an in-memory tree (like the actual /proc filesystem | |
37 | * tree) of these proc_dir_entries, so that we can dynamically | |
38 | * add new files to /proc. | |
39 | * | |
40 | * The "next" pointer creates a linked list of one /proc directory, | |
41 | * while parent/subdir create the directory structure (every | |
42 | * /proc file has a parent, but "subdir" is NULL for all | |
43 | * non-directory entries). | |
44 | * | |
8731f14d | 45 | * "owner" is used to protect module |
1da177e4 LT |
46 | * from unloading while proc_dir_entry is in use |
47 | */ | |
48 | ||
49 | typedef int (read_proc_t)(char *page, char **start, off_t off, | |
50 | int count, int *eof, void *data); | |
51 | typedef int (write_proc_t)(struct file *file, const char __user *buffer, | |
52 | unsigned long count, void *data); | |
1da177e4 LT |
53 | |
54 | struct proc_dir_entry { | |
55 | unsigned int low_ino; | |
56 | unsigned short namelen; | |
57 | const char *name; | |
58 | mode_t mode; | |
59 | nlink_t nlink; | |
60 | uid_t uid; | |
61 | gid_t gid; | |
22e6c1b3 | 62 | loff_t size; |
c5ef1c42 | 63 | const struct inode_operations *proc_iops; |
786d7e16 AD |
64 | /* |
65 | * NULL ->proc_fops means "PDE is going away RSN" or | |
66 | * "PDE is just created". In either case, e.g. ->read_proc won't be | |
67 | * called because it's too late or too early, respectively. | |
68 | * | |
69 | * If you're allocating ->proc_fops dynamically, save a pointer | |
70 | * somewhere. | |
71 | */ | |
c5ef1c42 | 72 | const struct file_operations *proc_fops; |
1da177e4 LT |
73 | struct module *owner; |
74 | struct proc_dir_entry *next, *parent, *subdir; | |
75 | void *data; | |
76 | read_proc_t *read_proc; | |
77 | write_proc_t *write_proc; | |
78 | atomic_t count; /* use count */ | |
786d7e16 AD |
79 | int pde_users; /* number of callers into module in progress */ |
80 | spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */ | |
81 | struct completion *pde_unload_completion; | |
881adb85 | 82 | struct list_head pde_openers; /* who did ->open, but not ->release */ |
1da177e4 LT |
83 | }; |
84 | ||
85 | struct kcore_list { | |
86 | struct kcore_list *next; | |
87 | unsigned long addr; | |
88 | size_t size; | |
89 | }; | |
90 | ||
666bfddb VG |
91 | struct vmcore { |
92 | struct list_head list; | |
93 | unsigned long long paddr; | |
80e8ff63 | 94 | unsigned long long size; |
666bfddb VG |
95 | loff_t offset; |
96 | }; | |
97 | ||
1da177e4 LT |
98 | #ifdef CONFIG_PROC_FS |
99 | ||
64a07bd8 SR |
100 | extern spinlock_t proc_subdir_lock; |
101 | ||
1da177e4 | 102 | extern void proc_root_init(void); |
1da177e4 | 103 | |
48e6484d | 104 | void proc_flush_task(struct task_struct *task); |
1da177e4 | 105 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); |
1da177e4 LT |
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 *); | |
df5f8314 EB |
109 | void task_mem(struct seq_file *, struct mm_struct *); |
110 | void clear_refs_smap(struct mm_struct *mm); | |
1da177e4 | 111 | |
7695650a AD |
112 | struct proc_dir_entry *de_get(struct proc_dir_entry *de); |
113 | void de_put(struct proc_dir_entry *de); | |
114 | ||
1da177e4 LT |
115 | extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, |
116 | struct proc_dir_entry *parent); | |
59b74351 | 117 | struct proc_dir_entry *proc_create_data(const char *name, mode_t mode, |
2d3a4e36 | 118 | struct proc_dir_entry *parent, |
59b74351 DL |
119 | const struct file_operations *proc_fops, |
120 | void *data); | |
1da177e4 LT |
121 | extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); |
122 | ||
123 | extern struct vfsmount *proc_mnt; | |
07543f5c PE |
124 | struct pid_namespace; |
125 | extern int proc_fill_super(struct super_block *); | |
1da177e4 LT |
126 | extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); |
127 | ||
1da177e4 LT |
128 | /* |
129 | * These are generic /proc routines that use the internal | |
130 | * "struct proc_dir_entry" tree to traverse the filesystem. | |
131 | * | |
132 | * The /proc root directory has extended versions to take care | |
133 | * of the /proc/<pid> subdirectories. | |
134 | */ | |
135 | extern int proc_readdir(struct file *, void *, filldir_t); | |
136 | extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); | |
137 | ||
6f4e6433 PE |
138 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); |
139 | extern void pid_ns_release_proc(struct pid_namespace *ns); | |
140 | ||
1da177e4 LT |
141 | /* |
142 | * proc_tty.c | |
143 | */ | |
144 | struct tty_driver; | |
145 | extern void proc_tty_init(void); | |
146 | extern void proc_tty_register_driver(struct tty_driver *driver); | |
147 | extern void proc_tty_unregister_driver(struct tty_driver *driver); | |
148 | ||
149 | /* | |
150 | * proc_devtree.c | |
151 | */ | |
183d0202 | 152 | #ifdef CONFIG_PROC_DEVICETREE |
1da177e4 | 153 | struct device_node; |
183d0202 | 154 | struct property; |
1da177e4 | 155 | extern void proc_device_tree_init(void); |
1da177e4 | 156 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); |
183d0202 | 157 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); |
898b5395 DB |
158 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, |
159 | struct property *prop); | |
160 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
161 | struct property *newprop, | |
162 | struct property *oldprop); | |
1da177e4 LT |
163 | #endif /* CONFIG_PROC_DEVICETREE */ |
164 | ||
165 | extern struct proc_dir_entry *proc_symlink(const char *, | |
166 | struct proc_dir_entry *, const char *); | |
167 | extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); | |
168 | extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, | |
169 | struct proc_dir_entry *parent); | |
170 | ||
59b74351 DL |
171 | static inline struct proc_dir_entry *proc_create(const char *name, mode_t mode, |
172 | struct proc_dir_entry *parent, const struct file_operations *proc_fops) | |
173 | { | |
174 | return proc_create_data(name, mode, parent, proc_fops, NULL); | |
175 | } | |
176 | ||
1da177e4 LT |
177 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, |
178 | mode_t mode, struct proc_dir_entry *base, | |
179 | read_proc_t *read_proc, void * data) | |
180 | { | |
181 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
182 | if (res) { | |
183 | res->read_proc=read_proc; | |
184 | res->data=data; | |
185 | } | |
186 | return res; | |
187 | } | |
188 | ||
457c4cbc EB |
189 | extern struct proc_dir_entry *proc_net_fops_create(struct net *net, |
190 | const char *name, mode_t mode, const struct file_operations *fops); | |
191 | extern void proc_net_remove(struct net *net, const char *name); | |
e5d69b9f DL |
192 | extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name, |
193 | struct proc_dir_entry *parent); | |
1da177e4 | 194 | |
925d1c40 MH |
195 | /* While the {get|set|dup}_mm_exe_file functions are for mm_structs, they are |
196 | * only needed to implement /proc/<pid>|self/exe so we define them here. */ | |
197 | extern void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file); | |
198 | extern struct file *get_mm_exe_file(struct mm_struct *mm); | |
199 | extern void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm); | |
200 | ||
1da177e4 LT |
201 | #else |
202 | ||
457c4cbc | 203 | #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; }) |
457c4cbc | 204 | static inline void proc_net_remove(struct net *net, const char *name) {} |
1da177e4 | 205 | |
60347f67 PE |
206 | static inline void proc_flush_task(struct task_struct *task) |
207 | { | |
208 | } | |
1da177e4 LT |
209 | |
210 | static inline struct proc_dir_entry *create_proc_entry(const char *name, | |
211 | mode_t mode, struct proc_dir_entry *parent) { return NULL; } | |
2d3a4e36 AD |
212 | static inline struct proc_dir_entry *proc_create(const char *name, |
213 | mode_t mode, struct proc_dir_entry *parent, | |
214 | const struct file_operations *proc_fops) | |
215 | { | |
216 | return NULL; | |
217 | } | |
59b74351 DL |
218 | static inline struct proc_dir_entry *proc_create_data(const char *name, |
219 | mode_t mode, struct proc_dir_entry *parent, | |
220 | const struct file_operations *proc_fops, void *data) | |
221 | { | |
222 | return NULL; | |
223 | } | |
1da177e4 LT |
224 | #define remove_proc_entry(name, parent) do {} while (0) |
225 | ||
226 | static inline struct proc_dir_entry *proc_symlink(const char *name, | |
227 | struct proc_dir_entry *parent,const char *dest) {return NULL;} | |
228 | static inline struct proc_dir_entry *proc_mkdir(const char *name, | |
229 | struct proc_dir_entry *parent) {return NULL;} | |
230 | ||
231 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, | |
232 | mode_t mode, struct proc_dir_entry *base, | |
233 | read_proc_t *read_proc, void * data) { return NULL; } | |
1da177e4 LT |
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 | ||
6f4e6433 PE |
239 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) |
240 | { | |
241 | return 0; | |
242 | } | |
243 | ||
244 | static inline void pid_ns_release_proc(struct pid_namespace *ns) | |
245 | { | |
246 | } | |
247 | ||
925d1c40 MH |
248 | static inline void set_mm_exe_file(struct mm_struct *mm, |
249 | struct file *new_exe_file) | |
250 | {} | |
251 | ||
252 | static inline struct file *get_mm_exe_file(struct mm_struct *mm) | |
253 | { | |
254 | return NULL; | |
255 | } | |
256 | ||
257 | static inline void dup_mm_exe_file(struct mm_struct *oldmm, | |
258 | struct mm_struct *newmm) | |
259 | {} | |
260 | ||
1da177e4 LT |
261 | #endif /* CONFIG_PROC_FS */ |
262 | ||
263 | #if !defined(CONFIG_PROC_KCORE) | |
264 | static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) | |
265 | { | |
266 | } | |
267 | #else | |
268 | extern void kclist_add(struct kcore_list *, void *, size_t); | |
269 | #endif | |
270 | ||
20cdc894 | 271 | union proc_op { |
3dcd25f3 | 272 | int (*proc_get_link)(struct inode *, struct path *); |
20cdc894 | 273 | int (*proc_read)(struct task_struct *task, char *page); |
be614086 EB |
274 | int (*proc_show)(struct seq_file *m, |
275 | struct pid_namespace *ns, struct pid *pid, | |
276 | struct task_struct *task); | |
20cdc894 EB |
277 | }; |
278 | ||
9043476f AV |
279 | struct ctl_table_header; |
280 | struct ctl_table; | |
281 | ||
1da177e4 | 282 | struct proc_inode { |
13b41b09 | 283 | struct pid *pid; |
aed7a6c4 | 284 | int fd; |
20cdc894 | 285 | union proc_op op; |
1da177e4 | 286 | struct proc_dir_entry *pde; |
9043476f AV |
287 | struct ctl_table_header *sysctl; |
288 | struct ctl_table *sysctl_entry; | |
1da177e4 LT |
289 | struct inode vfs_inode; |
290 | }; | |
291 | ||
292 | static inline struct proc_inode *PROC_I(const struct inode *inode) | |
293 | { | |
294 | return container_of(inode, struct proc_inode, vfs_inode); | |
295 | } | |
296 | ||
297 | static inline struct proc_dir_entry *PDE(const struct inode *inode) | |
298 | { | |
299 | return PROC_I(inode)->pde; | |
300 | } | |
301 | ||
457c4cbc EB |
302 | static inline struct net *PDE_NET(struct proc_dir_entry *pde) |
303 | { | |
304 | return pde->parent->data; | |
305 | } | |
306 | ||
99f89551 | 307 | struct proc_maps_private { |
13b41b09 | 308 | struct pid *pid; |
99f89551 | 309 | struct task_struct *task; |
dbf8685c | 310 | #ifdef CONFIG_MMU |
99f89551 | 311 | struct vm_area_struct *tail_vma; |
dbf8685c | 312 | #endif |
99f89551 EB |
313 | }; |
314 | ||
1da177e4 | 315 | #endif /* _LINUX_PROC_FS_H */ |