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).
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);
51 struct proc_dir_entry {
53 unsigned short namelen;
60 const struct inode_operations *proc_iops;
62 * NULL ->proc_fops means "PDE is going away RSN" or
63 * "PDE is just created". In either case, e.g. ->read_proc won't be
64 * called because it's too late or too early, respectively.
66 * If you're allocating ->proc_fops dynamically, save a pointer
69 const struct file_operations *proc_fops;
70 struct proc_dir_entry *next, *parent, *subdir;
72 read_proc_t *read_proc;
73 write_proc_t *write_proc;
74 atomic_t count; /* use count */
75 int pde_users; /* number of callers into module in progress */
76 spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
77 struct completion *pde_unload_completion;
78 struct list_head pde_openers; /* who did ->open, but not ->release */
82 struct kcore_list *next;
88 struct list_head list;
89 unsigned long long paddr;
90 unsigned long long size;
96 extern spinlock_t proc_subdir_lock;
98 extern void proc_root_init(void);
100 void proc_flush_task(struct task_struct *task);
101 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
102 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
103 unsigned long task_vsize(struct mm_struct *);
104 int task_statm(struct mm_struct *, int *, int *, int *, int *);
105 void task_mem(struct seq_file *, struct mm_struct *);
106 void clear_refs_smap(struct mm_struct *mm);
108 struct proc_dir_entry *de_get(struct proc_dir_entry *de);
109 void de_put(struct proc_dir_entry *de);
111 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
112 struct proc_dir_entry *parent);
113 struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
114 struct proc_dir_entry *parent,
115 const struct file_operations *proc_fops,
117 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
119 extern struct vfsmount *proc_mnt;
120 struct pid_namespace;
121 extern int proc_fill_super(struct super_block *);
122 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
125 * These are generic /proc routines that use the internal
126 * "struct proc_dir_entry" tree to traverse the filesystem.
128 * The /proc root directory has extended versions to take care
129 * of the /proc/<pid> subdirectories.
131 extern int proc_readdir(struct file *, void *, filldir_t);
132 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
134 extern int pid_ns_prepare_proc(struct pid_namespace *ns);
135 extern void pid_ns_release_proc(struct pid_namespace *ns);
141 extern void proc_tty_init(void);
142 extern void proc_tty_register_driver(struct tty_driver *driver);
143 extern void proc_tty_unregister_driver(struct tty_driver *driver);
148 #ifdef CONFIG_PROC_DEVICETREE
151 extern void proc_device_tree_init(void);
152 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
153 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
154 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
155 struct property *prop);
156 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
157 struct property *newprop,
158 struct property *oldprop);
159 #endif /* CONFIG_PROC_DEVICETREE */
161 extern struct proc_dir_entry *proc_symlink(const char *,
162 struct proc_dir_entry *, const char *);
163 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
164 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
165 struct proc_dir_entry *parent);
167 static inline struct proc_dir_entry *proc_create(const char *name, mode_t mode,
168 struct proc_dir_entry *parent, const struct file_operations *proc_fops)
170 return proc_create_data(name, mode, parent, proc_fops, NULL);
173 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
174 mode_t mode, struct proc_dir_entry *base,
175 read_proc_t *read_proc, void * data)
177 struct proc_dir_entry *res=create_proc_entry(name,mode,base);
179 res->read_proc=read_proc;
185 extern struct proc_dir_entry *proc_net_fops_create(struct net *net,
186 const char *name, mode_t mode, const struct file_operations *fops);
187 extern void proc_net_remove(struct net *net, const char *name);
188 extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
189 struct proc_dir_entry *parent);
191 /* While the {get|set|dup}_mm_exe_file functions are for mm_structs, they are
192 * only needed to implement /proc/<pid>|self/exe so we define them here. */
193 extern void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file);
194 extern struct file *get_mm_exe_file(struct mm_struct *mm);
195 extern void dup_mm_exe_file(struct mm_struct *oldmm, struct mm_struct *newmm);
199 #define proc_net_fops_create(net, name, mode, fops) ({ (void)(mode), NULL; })
200 static inline void proc_net_remove(struct net *net, const char *name) {}
202 static inline void proc_flush_task(struct task_struct *task)
206 static inline struct proc_dir_entry *create_proc_entry(const char *name,
207 mode_t mode, struct proc_dir_entry *parent) { return NULL; }
208 static inline struct proc_dir_entry *proc_create(const char *name,
209 mode_t mode, struct proc_dir_entry *parent,
210 const struct file_operations *proc_fops)
214 static inline struct proc_dir_entry *proc_create_data(const char *name,
215 mode_t mode, struct proc_dir_entry *parent,
216 const struct file_operations *proc_fops, void *data)
220 #define remove_proc_entry(name, parent) do {} while (0)
222 static inline struct proc_dir_entry *proc_symlink(const char *name,
223 struct proc_dir_entry *parent,const char *dest) {return NULL;}
224 static inline struct proc_dir_entry *proc_mkdir(const char *name,
225 struct proc_dir_entry *parent) {return NULL;}
227 static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
228 mode_t mode, struct proc_dir_entry *base,
229 read_proc_t *read_proc, void * data) { return NULL; }
232 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
233 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
235 static inline int pid_ns_prepare_proc(struct pid_namespace *ns)
240 static inline void pid_ns_release_proc(struct pid_namespace *ns)
244 static inline void set_mm_exe_file(struct mm_struct *mm,
245 struct file *new_exe_file)
248 static inline struct file *get_mm_exe_file(struct mm_struct *mm)
253 static inline void dup_mm_exe_file(struct mm_struct *oldmm,
254 struct mm_struct *newmm)
257 #endif /* CONFIG_PROC_FS */
259 #if !defined(CONFIG_PROC_KCORE)
260 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
264 extern void kclist_add(struct kcore_list *, void *, size_t);
268 int (*proc_get_link)(struct inode *, struct path *);
269 int (*proc_read)(struct task_struct *task, char *page);
270 int (*proc_show)(struct seq_file *m,
271 struct pid_namespace *ns, struct pid *pid,
272 struct task_struct *task);
275 struct ctl_table_header;
282 struct proc_dir_entry *pde;
283 struct ctl_table_header *sysctl;
284 struct ctl_table *sysctl_entry;
285 struct inode vfs_inode;
288 static inline struct proc_inode *PROC_I(const struct inode *inode)
290 return container_of(inode, struct proc_inode, vfs_inode);
293 static inline struct proc_dir_entry *PDE(const struct inode *inode)
295 return PROC_I(inode)->pde;
298 static inline struct net *PDE_NET(struct proc_dir_entry *pde)
300 return pde->parent->data;
303 struct proc_maps_private {
305 struct task_struct *task;
307 struct vm_area_struct *tail_vma;
311 #endif /* _LINUX_PROC_FS_H */