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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 AD |
11 | struct completion; |
12 | ||
1da177e4 LT |
13 | /* |
14 | * The proc filesystem constants/structures | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Offset of the first process in the /proc root directory.. | |
19 | */ | |
20 | #define FIRST_PROCESS_ENTRY 256 | |
21 | ||
22 | ||
23 | /* | |
24 | * We always define these enumerators | |
25 | */ | |
26 | ||
27 | enum { | |
28 | PROC_ROOT_INO = 1, | |
29 | }; | |
30 | ||
1da177e4 LT |
31 | /* |
32 | * This is not completely implemented yet. The idea is to | |
33 | * create an in-memory tree (like the actual /proc filesystem | |
34 | * tree) of these proc_dir_entries, so that we can dynamically | |
35 | * add new files to /proc. | |
36 | * | |
37 | * The "next" pointer creates a linked list of one /proc directory, | |
38 | * while parent/subdir create the directory structure (every | |
39 | * /proc file has a parent, but "subdir" is NULL for all | |
40 | * non-directory entries). | |
41 | * | |
42 | * "get_info" is called at "read", while "owner" is used to protect module | |
43 | * from unloading while proc_dir_entry is in use | |
44 | */ | |
45 | ||
46 | typedef int (read_proc_t)(char *page, char **start, off_t off, | |
47 | int count, int *eof, void *data); | |
48 | typedef int (write_proc_t)(struct file *file, const char __user *buffer, | |
49 | unsigned long count, void *data); | |
50 | typedef int (get_info_t)(char *, char **, off_t, int); | |
51 | ||
52 | struct proc_dir_entry { | |
53 | unsigned int low_ino; | |
54 | unsigned short namelen; | |
55 | const char *name; | |
56 | mode_t mode; | |
57 | nlink_t nlink; | |
58 | uid_t uid; | |
59 | gid_t gid; | |
22e6c1b3 | 60 | loff_t size; |
c5ef1c42 | 61 | const struct inode_operations *proc_iops; |
786d7e16 AD |
62 | /* |
63 | * NULL ->proc_fops means "PDE is going away RSN" or | |
64 | * "PDE is just created". In either case, e.g. ->read_proc won't be | |
65 | * called because it's too late or too early, respectively. | |
66 | * | |
67 | * If you're allocating ->proc_fops dynamically, save a pointer | |
68 | * somewhere. | |
69 | */ | |
c5ef1c42 | 70 | const struct file_operations *proc_fops; |
1da177e4 LT |
71 | get_info_t *get_info; |
72 | struct module *owner; | |
73 | struct proc_dir_entry *next, *parent, *subdir; | |
74 | void *data; | |
75 | read_proc_t *read_proc; | |
76 | write_proc_t *write_proc; | |
77 | atomic_t count; /* use count */ | |
78 | int deleted; /* delete flag */ | |
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; | |
1da177e4 LT |
82 | }; |
83 | ||
84 | struct kcore_list { | |
85 | struct kcore_list *next; | |
86 | unsigned long addr; | |
87 | size_t size; | |
88 | }; | |
89 | ||
666bfddb VG |
90 | struct vmcore { |
91 | struct list_head list; | |
92 | unsigned long long paddr; | |
80e8ff63 | 93 | unsigned long long size; |
666bfddb VG |
94 | loff_t offset; |
95 | }; | |
96 | ||
1da177e4 LT |
97 | #ifdef CONFIG_PROC_FS |
98 | ||
99 | extern struct proc_dir_entry proc_root; | |
100 | extern struct proc_dir_entry *proc_root_fs; | |
1da177e4 LT |
101 | extern struct proc_dir_entry *proc_bus; |
102 | extern struct proc_dir_entry *proc_root_driver; | |
103 | extern struct proc_dir_entry *proc_root_kcore; | |
104 | ||
64a07bd8 SR |
105 | extern spinlock_t proc_subdir_lock; |
106 | ||
1da177e4 LT |
107 | extern void proc_root_init(void); |
108 | extern void proc_misc_init(void); | |
109 | ||
110 | struct mm_struct; | |
111 | ||
48e6484d | 112 | void proc_flush_task(struct task_struct *task); |
1da177e4 | 113 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); |
1da177e4 LT |
114 | int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); |
115 | unsigned long task_vsize(struct mm_struct *); | |
116 | int task_statm(struct mm_struct *, int *, int *, int *, int *); | |
117 | char *task_mem(struct mm_struct *, char *); | |
b813e931 | 118 | void clear_refs_smap(struct mm_struct *mm); |
1da177e4 | 119 | |
7695650a AD |
120 | struct proc_dir_entry *de_get(struct proc_dir_entry *de); |
121 | void de_put(struct proc_dir_entry *de); | |
122 | ||
1da177e4 LT |
123 | extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, |
124 | struct proc_dir_entry *parent); | |
125 | extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); | |
126 | ||
127 | extern struct vfsmount *proc_mnt; | |
07543f5c PE |
128 | struct pid_namespace; |
129 | extern int proc_fill_super(struct super_block *); | |
1da177e4 LT |
130 | extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); |
131 | ||
1da177e4 LT |
132 | /* |
133 | * These are generic /proc routines that use the internal | |
134 | * "struct proc_dir_entry" tree to traverse the filesystem. | |
135 | * | |
136 | * The /proc root directory has extended versions to take care | |
137 | * of the /proc/<pid> subdirectories. | |
138 | */ | |
139 | extern int proc_readdir(struct file *, void *, filldir_t); | |
140 | extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); | |
141 | ||
4b6f5d20 AV |
142 | extern const struct file_operations proc_kcore_operations; |
143 | extern const struct file_operations proc_kmsg_operations; | |
144 | extern const struct file_operations ppc_htab_operations; | |
1da177e4 | 145 | |
6f4e6433 PE |
146 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); |
147 | extern void pid_ns_release_proc(struct pid_namespace *ns); | |
148 | ||
1da177e4 LT |
149 | /* |
150 | * proc_tty.c | |
151 | */ | |
152 | struct tty_driver; | |
153 | extern void proc_tty_init(void); | |
154 | extern void proc_tty_register_driver(struct tty_driver *driver); | |
155 | extern void proc_tty_unregister_driver(struct tty_driver *driver); | |
156 | ||
157 | /* | |
158 | * proc_devtree.c | |
159 | */ | |
183d0202 | 160 | #ifdef CONFIG_PROC_DEVICETREE |
1da177e4 | 161 | struct device_node; |
183d0202 | 162 | struct property; |
1da177e4 | 163 | extern void proc_device_tree_init(void); |
1da177e4 | 164 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); |
183d0202 | 165 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); |
898b5395 DB |
166 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, |
167 | struct property *prop); | |
168 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
169 | struct property *newprop, | |
170 | struct property *oldprop); | |
1da177e4 LT |
171 | #endif /* CONFIG_PROC_DEVICETREE */ |
172 | ||
173 | extern struct proc_dir_entry *proc_symlink(const char *, | |
174 | struct proc_dir_entry *, const char *); | |
175 | extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); | |
176 | extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, | |
177 | struct proc_dir_entry *parent); | |
178 | ||
179 | static inline struct proc_dir_entry *create_proc_read_entry(const char *name, | |
180 | mode_t mode, struct proc_dir_entry *base, | |
181 | read_proc_t *read_proc, void * data) | |
182 | { | |
183 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
184 | if (res) { | |
185 | res->read_proc=read_proc; | |
186 | res->data=data; | |
187 | } | |
188 | return res; | |
189 | } | |
190 | ||
191 | static inline struct proc_dir_entry *create_proc_info_entry(const char *name, | |
192 | mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) | |
193 | { | |
194 | struct proc_dir_entry *res=create_proc_entry(name,mode,base); | |
195 | if (res) res->get_info=get_info; | |
196 | return res; | |
197 | } | |
1da177e4 | 198 | |
457c4cbc EB |
199 | extern struct proc_dir_entry *proc_net_fops_create(struct net *net, |
200 | const char *name, mode_t mode, const struct file_operations *fops); | |
201 | extern void proc_net_remove(struct net *net, const char *name); | |
1da177e4 LT |
202 | |
203 | #else | |
204 | ||
205 | #define proc_root_driver NULL | |
1da177e4 LT |
206 | #define proc_bus NULL |
207 | ||
457c4cbc | 208 | #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; }) |
457c4cbc | 209 | static inline void proc_net_remove(struct net *net, const char *name) {} |
1da177e4 | 210 | |
60347f67 PE |
211 | static inline void proc_flush_task(struct task_struct *task) |
212 | { | |
213 | } | |
1da177e4 LT |
214 | |
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 | ||
220 | static inline struct proc_dir_entry *proc_symlink(const char *name, | |
221 | struct proc_dir_entry *parent,const char *dest) {return NULL;} | |
222 | static inline struct proc_dir_entry *proc_mkdir(const char *name, | |
223 | struct proc_dir_entry *parent) {return NULL;} | |
224 | ||
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; } | |
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; | |
233 | static inline void proc_tty_register_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 | ||
6f4e6433 PE |
238 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) |
239 | { | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static inline void pid_ns_release_proc(struct pid_namespace *ns) | |
244 | { | |
245 | } | |
246 | ||
1da177e4 LT |
247 | #endif /* CONFIG_PROC_FS */ |
248 | ||
249 | #if !defined(CONFIG_PROC_KCORE) | |
250 | static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) | |
251 | { | |
252 | } | |
253 | #else | |
254 | extern void kclist_add(struct kcore_list *, void *, size_t); | |
255 | #endif | |
256 | ||
20cdc894 EB |
257 | union proc_op { |
258 | int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); | |
259 | int (*proc_read)(struct task_struct *task, char *page); | |
260 | }; | |
261 | ||
1da177e4 | 262 | struct proc_inode { |
13b41b09 | 263 | struct pid *pid; |
aed7a6c4 | 264 | int fd; |
20cdc894 | 265 | union proc_op op; |
1da177e4 LT |
266 | struct proc_dir_entry *pde; |
267 | struct inode vfs_inode; | |
268 | }; | |
269 | ||
270 | static inline struct proc_inode *PROC_I(const struct inode *inode) | |
271 | { | |
272 | return container_of(inode, struct proc_inode, vfs_inode); | |
273 | } | |
274 | ||
275 | static inline struct proc_dir_entry *PDE(const struct inode *inode) | |
276 | { | |
277 | return PROC_I(inode)->pde; | |
278 | } | |
279 | ||
457c4cbc EB |
280 | static inline struct net *PDE_NET(struct proc_dir_entry *pde) |
281 | { | |
282 | return pde->parent->data; | |
283 | } | |
284 | ||
077130c0 | 285 | struct net *get_proc_net(const struct inode *inode); |
457c4cbc | 286 | |
99f89551 | 287 | struct proc_maps_private { |
13b41b09 | 288 | struct pid *pid; |
99f89551 | 289 | struct task_struct *task; |
dbf8685c | 290 | #ifdef CONFIG_MMU |
99f89551 | 291 | struct vm_area_struct *tail_vma; |
dbf8685c | 292 | #endif |
99f89551 EB |
293 | }; |
294 | ||
1da177e4 | 295 | #endif /* _LINUX_PROC_FS_H */ |