proc_fs.h
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上传日期:2013-04-10
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文件大小:6k
- #ifndef _LINUX_PROC_FS_H
- #define _LINUX_PROC_FS_H
- #include <linux/config.h>
- #include <linux/slab.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 4096
- #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 *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 */
- kdev_t rdev;
- };
- #define PROC_INODE_PROPER(inode) ((inode)->i_ino & ~0xffff)
- #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);
- void proc_pid_delete_inode(struct inode *inode);
- 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 struct super_block *proc_read_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 *);
- 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);
- /*
- * PPC64
- */
- extern void proc_ppc64_init(void);
- extern void iSeries_proc_create(void);
- extern struct proc_dir_entry *proc_symlink(const char *,
- struct proc_dir_entry *, const char *);
- extern struct proc_dir_entry *proc_mknod(const char *,mode_t,
- struct proc_dir_entry *,kdev_t);
- 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 void proc_net_remove(const char *name)
- {
- remove_proc_entry(name,proc_net);
- }
- #else
- #define proc_root_driver NULL
- static inline struct proc_dir_entry *proc_net_create(const char *name, mode_t mode,
- get_info_t *get_info) {return NULL;}
- static inline void proc_net_remove(const char *name) {}
- static inline struct proc_dir_entry *create_proc_entry(const char *name,
- mode_t mode, struct proc_dir_entry *parent) { return NULL; }
- static inline void remove_proc_entry(const char *name, struct proc_dir_entry *parent) {};
- 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_mknod(const char *name,mode_t mode,
- struct proc_dir_entry *parent,kdev_t rdev) {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; }
- 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 */
- #endif /* _LINUX_PROC_FS_H */