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#ifndef _LINUX_PROC_FS_H

#define _LINUX_PROC_FS_H

#include <linux/config.h>

#include <linux/slab.h>

#include <linux/fs.h>

#include <asm/atomic.h>

/*

 * The proc filesystem constants/structures

 */

/*

 * Offset of the first process in the /proc root directory..

 */

#define FIRST_PROCESS_ENTRY 256

/*

 * We always define these enumerators

 */

enum {

        PROC_ROOT_INO = 1,

};

/* Finally, the dynamically allocatable proc entries are reserved: */

#define PROC_DYNAMIC_FIRST 4096

#define PROC_NDYNAMIC      16384

#define PROC_SUPER_MAGIC 0x9fa0

/*

 * This is not completely implemented yet. The idea is to

 * create an in-memory tree (like the actual /proc filesystem

 * tree) of these proc_dir_entries, so that we can dynamically

 * add new files to /proc.

 *

 * The "next" pointer creates a linked list of one /proc directory,

 * while parent/subdir create the directory structure (every

 * /proc file has a parent, but "subdir" is NULL for all

 * non-directory entries).

 *

 * "get_info" is called at "read", while "owner" is used to protect module

 * from unloading while proc_dir_entry is in use

 */

typedef int (read_proc_t)(char *page, char **start, off_t off,

                          int count, int *eof, void *data);

typedef int (write_proc_t)(struct file *file, const char __user *buffer,

                           unsigned long count, void *data);

typedef int (get_info_t)(char *, char **, off_t, int);

struct proc_dir_entry {

        unsigned short low_ino;

        unsigned short namelen;

        const char *name;

        mode_t mode;

        nlink_t nlink;

        uid_t uid;

        gid_t gid;

        unsigned long size;

        struct inode_operations * proc_iops;

        struct file_operations * proc_fops;

        get_info_t *get_info;

        struct module *owner;

        struct proc_dir_entry *next, *parent, *subdir;

        void *data;

        read_proc_t *read_proc;

        write_proc_t *write_proc;

        atomic_t count;         /* use count */

        int deleted;            /* delete flag */

};

struct kcore_list {

        struct kcore_list *next;

        unsigned long addr;

        size_t size;

};

#ifdef CONFIG_PROC_FS

extern struct proc_dir_entry proc_root;

extern struct proc_dir_entry *proc_root_fs;

extern struct proc_dir_entry *proc_net;

extern struct proc_dir_entry *proc_bus;

extern struct proc_dir_entry *proc_root_driver;

extern struct proc_dir_entry *proc_root_kcore;

extern void proc_root_init(void);

extern void proc_misc_init(void);

struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);

struct dentry *proc_pid_unhash(struct task_struct *p);

void proc_pid_flush(struct dentry *proc_dentry);

int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);

extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,

                                                struct proc_dir_entry *parent);

extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);

extern struct vfsmount *proc_mnt;

extern int proc_fill_super(struct super_block *,void *,int);

extern struct inode * proc_get_inode(struct super_block *, int, struct proc_dir_entry *);

extern int proc_match(int, const char *,struct proc_dir_entry *);

/*

 * These are generic /proc routines that use the internal

 * "struct proc_dir_entry" tree to traverse the filesystem.

 *

 * The /proc root directory has extended versions to take care

 * of the /proc/<pid> subdirectories.

 */

extern int proc_readdir(struct file *, void *, filldir_t);

extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);

extern struct file_operations proc_kcore_operations;

extern struct file_operations proc_kmsg_operations;

extern struct file_operations ppc_htab_operations;

/*

 * proc_tty.c

 */

struct tty_driver;

extern void proc_tty_init(void);

extern void proc_tty_register_driver(struct tty_driver *driver);

extern void proc_tty_unregister_driver(struct tty_driver *driver);

/*

 * proc_devtree.c

 */

extern void proc_device_tree_init(void);

/*

 * proc_rtas.c

 */

extern void proc_rtas_init(void);

extern struct proc_dir_entry *proc_symlink(const char *,

                struct proc_dir_entry *, const char *);

extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);

static inline struct proc_dir_entry *create_proc_read_entry(const char *name,

        mode_t mode, struct proc_dir_entry *base,

        read_proc_t *read_proc, void * data)

{

        struct proc_dir_entry *res=create_proc_entry(name,mode,base);

        if (res) {

                res->read_proc=read_proc;

                res->data=data;

        }

        return res;

}

static inline struct proc_dir_entry *create_proc_info_entry(const char *name,

        mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)

{

        struct proc_dir_entry *res=create_proc_entry(name,mode,base);

        if (res) res->get_info=get_info;

        return res;

}

static inline struct proc_dir_entry *proc_net_create(const char *name,

        mode_t mode, get_info_t *get_info)

{

        return create_proc_info_entry(name,mode,proc_net,get_info);

}

static inline struct proc_dir_entry *proc_net_fops_create(const char *name,

        mode_t mode, struct file_operations *fops)

{

        struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);

        if (res)

                res->proc_fops = fops;

        return res;

}

static inline void proc_net_remove(const char *name)

{

        remove_proc_entry(name,proc_net);

}

#else

#define proc_root_driver NULL

#define proc_net NULL

#define proc_net_fops_create(name, mode, fops)  ({ (void)(mode), NULL; })

#define proc_net_create(name, mode, info)       ({ (void)(mode), NULL; })

static inline void proc_net_remove(const char *name) {}

static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; }

static inline void proc_pid_flush(struct dentry *proc_dentry) { }

static inline struct proc_dir_entry *create_proc_entry(const char *name,

        mode_t mode, struct proc_dir_entry *parent) { return NULL; }

#define remove_proc_entry(name, parent) do {} while (0)

static inline struct proc_dir_entry *proc_symlink(const char *name,

                struct proc_dir_entry *parent,char *dest) {return NULL;}

static inline struct proc_dir_entry *proc_mkdir(const char *name,

        struct proc_dir_entry *parent) {return NULL;}

static inline struct proc_dir_entry *create_proc_read_entry(const char *name,

        mode_t mode, struct proc_dir_entry *base,

        int (*read_proc)(char *, char **, off_t, int, int *, void *),

        void * data) { return NULL; }

static inline struct proc_dir_entry *create_proc_info_entry(const char *name,

        mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)

        { return NULL; }

struct tty_driver;

static inline void proc_tty_register_driver(struct tty_driver *driver) {};

static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};

extern struct proc_dir_entry proc_root;

#endif /* CONFIG_PROC_FS */

#if !defined(CONFIG_PROC_FS)

static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)

{

}

static inline struct kcore_list * kclist_del(void *addr)

{

        return NULL;

}

#else

extern void kclist_add(struct kcore_list *, void *, size_t);

extern struct kcore_list *kclist_del(void *);

#endif

struct proc_inode {

        struct task_struct *task;

        int type;

        union {

                int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);

                int (*proc_read)(struct task_struct *task, char *page);

        } op;

        struct proc_dir_entry *pde;

        struct inode vfs_inode;

};

static inline struct proc_inode *PROC_I(const struct inode *inode)

{

        return container_of(inode, struct proc_inode, vfs_inode);

}

static inline struct proc_dir_entry *PDE(const struct inode *inode)

{

        return PROC_I(inode)->pde;

}

#endif /* _LINUX_PROC_FS_H */