1 #ifndef _LINUX_PROC_FS_H
2 #define _LINUX_PROC_FS_H
4 #include <linux/slab.h>
6 #include <linux/spinlock.h>
7 #include <linux/magic.h>
8 #include <asm/atomic.h>
15 * The proc filesystem constants/structures
19 * Offset of the first process in the /proc root directory..
21 #define FIRST_PROCESS_ENTRY 256
23 /* Worst case buffer size needed for holding an integer. */
24 #define PROC_NUMBUF 13
27 * We always define these enumerators
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.
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).
45 * "owner" is used to protect module
46 * from unloading while proc_dir_entry is in use
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);
54 struct proc_dir_entry {
56 unsigned short namelen;
63 const struct inode_operations *proc_iops;
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.
69 * If you're allocating ->proc_fops dynamically, save a pointer
72 const struct file_operations *proc_fops;
74 struct proc_dir_entry *next, *parent, *subdir;
76 read_proc_t *read_proc;
77 write_proc_t *write_proc;
78 atomic_t count; /* use count */
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;
82 struct list_head pde_openers; /* who did ->open, but not ->release */
86 struct kcore_list *next;
92 struct list_head list;
93 unsigned long long paddr;
94 unsigned long long size;
100 extern spinlock_t proc_subdir_lock;
102 extern void proc_root_init(void);
103 extern void proc_misc_init(void);
105 void proc_flush_task(struct task_struct *task);
106 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
107 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
108 unsigned long task_vsize(struct mm_struct *);
109 int task_statm(struct mm_struct *, int *, int *, int *, int *);
110 void task_mem(struct seq_file *, struct mm_struct *);
111 void clear_refs_smap(struct mm_struct *mm);
113 struct proc_dir_entry *de_get(struct proc_dir_entry *de);
114 void de_put(struct proc_dir_entry *de);
116 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
117 struct proc_dir_entry *parent);
118 struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
119 struct proc_dir_entry *parent,
120 const struct file_operations *proc_fops,
122 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
124 extern struct vfsmount *proc_mnt;
125 struct pid_namespace;
126 extern int proc_fill_super(struct super_block *);
127 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
130 * These are generic /proc routines that use the internal
131 * "struct proc_dir_entry" tree to traverse the filesystem.
133 * The /proc root directory has extended versions to take care
134 * of the /proc/<pid> subdirectories.
136 extern int proc_readdir(struct file *, void *, filldir_t);
137 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
139 extern int pid_ns_prepare_proc(struct pid_namespace *ns);
140 extern void pid_ns_release_proc(struct pid_namespace *ns);
146 extern void proc_tty_init(void);
147 extern void proc_tty_register_driver(struct tty_driver *driver);
148 extern void proc_tty_unregister_driver(struct tty_driver *driver);
153 #ifdef CONFIG_PROC_DEVICETREE
156 extern void proc_device_tree_init(void);
157 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
158 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
159 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
160 struct property *prop);
161 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
162 struct property *newprop,
163 struct property *oldprop);
164 #endif /* CONFIG_PROC_DEVICETREE */
166 extern struct proc_dir_entry *proc_symlink(const char *,
167 struct proc_dir_entry *, const char *);
168 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
169 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
170 struct proc_dir_entry *parent);
172 static inline struct proc_dir_entry *proc_create(const char *name, mode_t mode,
173 struct proc_dir_entry *parent, const struct file_operations *proc_fops)
175 return proc_create_data(name, mode, parent, proc_fops, NULL);
178 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
179 mode_t mode, struct proc_dir_entry *base,
180 read_proc_t *read_proc, void * data)
182 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
184 res->read_proc=read_proc;
190 extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
191 const char *name, mode_t mode, const struct file_operations *fops);
192 extern void proc_net_remove(struct net *net, const char *name);
193 extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
194 struct proc_dir_entry *parent);
196 /* While the {get|set|dup}_mm_exe_file functions are for mm_structs, they are
197 * only needed to implement /proc/<pid>|self/exe so we define them here. */
198 extern void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file);
199 extern struct file *get_mm_exe_file(struct mm_struct *mm);
200 extern void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm);
204 #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
205 static inline void proc_net_remove(struct net *net, const char *name) {}
207 static inline void proc_flush_task(struct task_struct *task)
211 static inline struct proc_dir_entry *create_proc_entry(const char *name,
212 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
213 static inline struct proc_dir_entry *proc_create(const char *name,
214 mode_t mode, struct proc_dir_entry *parent,
215 const struct file_operations *proc_fops)
219 static inline struct proc_dir_entry *proc_create_data(const char *name,
220 mode_t mode, struct proc_dir_entry *parent,
221 const struct file_operations *proc_fops, void *data)
225 #define remove_proc_entry(name, parent) do {} while (0)
227 static inline struct proc_dir_entry *proc_symlink(const char *name,
228 struct proc_dir_entry *parent,const char *dest) {return NULL;}
229 static inline struct proc_dir_entry *proc_mkdir(const char *name,
230 struct proc_dir_entry *parent) {return NULL;}
232 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
233 mode_t mode, struct proc_dir_entry *base,
234 read_proc_t *read_proc, void * data) { return NULL; }
237 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
238 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
240 static inline int pid_ns_prepare_proc(struct pid_namespace *ns)
245 static inline void pid_ns_release_proc(struct pid_namespace *ns)
249 static inline void set_mm_exe_file(struct mm_struct *mm,
250 struct file *new_exe_file)
253 static inline struct file *get_mm_exe_file(struct mm_struct *mm)
258 static inline void dup_mm_exe_file(struct mm_struct *oldmm,
259 struct mm_struct *newmm)
262 #endif /* CONFIG_PROC_FS */
264 #if !defined(CONFIG_PROC_KCORE)
265 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
269 extern void kclist_add(struct kcore_list *, void *, size_t);
273 int (*proc_get_link)(struct inode *, struct path *);
274 int (*proc_read)(struct task_struct *task, char *page);
275 int (*proc_show)(struct seq_file *m,
276 struct pid_namespace *ns, struct pid *pid,
277 struct task_struct *task);
280 struct ctl_table_header;
287 struct proc_dir_entry *pde;
288 struct ctl_table_header *sysctl;
289 struct ctl_table *sysctl_entry;
290 struct inode vfs_inode;
293 static inline struct proc_inode *PROC_I(const struct inode *inode)
295 return container_of(inode, struct proc_inode, vfs_inode);
298 static inline struct proc_dir_entry *PDE(const struct inode *inode)
300 return PROC_I(inode)->pde;
303 static inline struct net *PDE_NET(struct proc_dir_entry *pde)
305 return pde->parent->data;
308 struct proc_maps_private {
310 struct task_struct *task;
312 struct vm_area_struct *tail_vma;
316 #endif /* _LINUX_PROC_FS_H */