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 <linux/atomic.h>
9 #include <linux/proc_ns.h>
16 * The proc filesystem constants/structures
20 * Offset of the first process in the /proc root directory..
22 #define FIRST_PROCESS_ENTRY 256
24 /* Worst case buffer size needed for holding an integer. */
25 #define PROC_NUMBUF 13
28 * This is not completely implemented yet. The idea is to
29 * create an in-memory tree (like the actual /proc filesystem
30 * tree) of these proc_dir_entries, so that we can dynamically
31 * add new files to /proc.
33 * The "next" pointer creates a linked list of one /proc directory,
34 * while parent/subdir create the directory structure (every
35 * /proc file has a parent, but "subdir" is NULL for all
36 * non-directory entries).
39 struct proc_dir_entry {
46 const struct inode_operations *proc_iops;
47 const struct file_operations *proc_fops;
48 struct proc_dir_entry *next, *parent, *subdir;
50 atomic_t count; /* use count */
51 atomic_t in_use; /* number of callers into module in progress; */
52 /* negative -> it's going away RSN */
53 struct completion *pde_unload_completion;
54 struct list_head pde_openers; /* who did ->open, but not ->release */
55 spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
62 extern void proc_root_init(void);
64 void proc_flush_task(struct task_struct *task);
66 struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
67 struct proc_dir_entry *parent,
68 const struct file_operations *proc_fops,
70 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
71 extern int remove_proc_subtree(const char *name, struct proc_dir_entry *parent);
79 extern void proc_tty_init(void);
81 static inline void proc_tty_init(void)
84 extern void proc_tty_register_driver(struct tty_driver *driver);
85 extern void proc_tty_unregister_driver(struct tty_driver *driver);
90 #ifdef CONFIG_PROC_DEVICETREE
93 extern void proc_device_tree_init(void);
94 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
95 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
96 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
97 struct property *prop);
98 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
99 struct property *newprop,
100 struct property *oldprop);
101 #endif /* CONFIG_PROC_DEVICETREE */
103 extern struct proc_dir_entry *proc_symlink(const char *,
104 struct proc_dir_entry *, const char *);
105 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
106 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode,
107 struct proc_dir_entry *parent);
109 static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode,
110 struct proc_dir_entry *parent, const struct file_operations *proc_fops)
112 return proc_create_data(name, mode, parent, proc_fops, NULL);
115 extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
116 struct proc_dir_entry *parent);
118 extern void proc_set_size(struct proc_dir_entry *, loff_t);
119 extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
122 static inline void proc_flush_task(struct task_struct *task)
126 #define proc_create(name, mode, parent, fops) ({ (void)(mode), NULL; })
128 static inline struct proc_dir_entry *proc_create_data(const char *name,
129 umode_t mode, struct proc_dir_entry *parent,
130 const struct file_operations *proc_fops, void *data)
134 #define remove_proc_entry(name, parent) do {} while (0)
135 #define remove_proc_subtree(name, parent) do {} while (0)
137 static inline struct proc_dir_entry *proc_symlink(const char *name,
138 struct proc_dir_entry *parent,const char *dest) {return NULL;}
139 static inline struct proc_dir_entry *proc_mkdir(const char *name,
140 struct proc_dir_entry *parent) {return NULL;}
141 static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
142 umode_t mode, struct proc_dir_entry *parent) { return NULL; }
143 static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {}
144 static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {}
147 static inline void proc_tty_register_driver(struct tty_driver *driver) {};
148 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
150 #endif /* CONFIG_PROC_FS */
154 int (*proc_get_link)(struct dentry *, struct path *);
155 int (*proc_read)(struct task_struct *task, char *page);
156 int (*proc_show)(struct seq_file *m,
157 struct pid_namespace *ns, struct pid *pid,
158 struct task_struct *task);
161 struct ctl_table_header;
168 struct proc_dir_entry *pde;
169 struct ctl_table_header *sysctl;
170 struct ctl_table *sysctl_entry;
172 struct inode vfs_inode;
175 static inline struct proc_inode *PROC_I(const struct inode *inode)
177 return container_of(inode, struct proc_inode, vfs_inode);
180 static inline struct proc_dir_entry *PDE(const struct inode *inode)
182 return PROC_I(inode)->pde;
185 static inline void *PDE_DATA(const struct inode *inode)
187 return PROC_I(inode)->pde->data;
190 #include <linux/signal.h>
192 void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set);
193 #endif /* _LINUX_PROC_FS_H */