1#ifndef _LINUX_PROC_FS_H 2#define _LINUX_PROC_FS_H 3 4#include <linux/config.h> 5#include <linux/slab.h> 6 7/* 8 * The proc filesystem constants/structures 9 */ 10 11/* 12 * Offset of the first process in the /proc root directory.. 13 */ 14#define FIRST_PROCESS_ENTRY 256 15 16 17/* 18 * We always define these enumerators 19 */ 20 21enum { 22 PROC_ROOT_INO = 1, 23}; 24 25/* Finally, the dynamically allocatable proc entries are reserved: */ 26 27#define PROC_DYNAMIC_FIRST 4096 28#define PROC_NDYNAMIC 4096 29 30#define PROC_SUPER_MAGIC 0x9fa0 31 32/* 33 * This is not completely implemented yet. The idea is to 34 * create an in-memory tree (like the actual /proc filesystem 35 * tree) of these proc_dir_entries, so that we can dynamically 36 * add new files to /proc. 37 * 38 * The "next" pointer creates a linked list of one /proc directory, 39 * while parent/subdir create the directory structure (every 40 * /proc file has a parent, but "subdir" is NULL for all 41 * non-directory entries). 42 * 43 * "get_info" is called at "read", while "owner" is used to protect module 44 * from unloading while proc_dir_entry is in use 45 */ 46 47typedef int (read_proc_t)(char *page, char **start, off_t off, 48 int count, int *eof, void *data); 49typedef int (write_proc_t)(struct file *file, const char *buffer, 50 unsigned long count, void *data); 51typedef int (get_info_t)(char *, char **, off_t, int); 52 53struct proc_dir_entry { 54 unsigned short low_ino; 55 unsigned short namelen; 56 const char *name; 57 mode_t mode; 58 nlink_t nlink; 59 uid_t uid; 60 gid_t gid; 61 unsigned long size; 62 struct inode_operations * proc_iops; 63 struct file_operations * proc_fops; 64 get_info_t *get_info; 65 struct module *owner; 66 struct proc_dir_entry *next, *parent, *subdir; 67 void *data; 68 read_proc_t *read_proc; 69 write_proc_t *write_proc; 70 atomic_t count; /* use count */ 71 int deleted; /* delete flag */ 72 kdev_t rdev; 73}; 74 75#define PROC_INODE_PROPER(inode) ((inode)->i_ino & ~0xffff) 76 77#ifdef CONFIG_PROC_FS 78 79extern struct proc_dir_entry proc_root; 80extern struct proc_dir_entry *proc_root_fs; 81extern struct proc_dir_entry *proc_net; 82extern struct proc_dir_entry *proc_bus; 83extern struct proc_dir_entry *proc_root_driver; 84extern struct proc_dir_entry *proc_root_kcore; 85 86extern void proc_root_init(void); 87extern void proc_misc_init(void); 88 89struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry); 90void proc_pid_delete_inode(struct inode *inode); 91int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 92 93extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 94 struct proc_dir_entry *parent); 95extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 96 97extern struct vfsmount *proc_mnt; 98extern struct super_block *proc_read_super(struct super_block *,void *,int); 99extern struct inode * proc_get_inode(struct super_block *, int, struct proc_dir_entry *); 100 101extern int proc_match(int, const char *,struct proc_dir_entry *); 102 103/* 104 * These are generic /proc routines that use the internal 105 * "struct proc_dir_entry" tree to traverse the filesystem. 106 * 107 * The /proc root directory has extended versions to take care 108 * of the /proc/<pid> subdirectories. 109 */ 110extern int proc_readdir(struct file *, void *, filldir_t); 111extern struct dentry *proc_lookup(struct inode *, struct dentry *); 112 113extern struct file_operations proc_kcore_operations; 114extern struct file_operations proc_kmsg_operations; 115extern struct file_operations ppc_htab_operations; 116 117/* 118 * proc_tty.c 119 */ 120struct tty_driver; 121extern void proc_tty_init(void); 122extern void proc_tty_register_driver(struct tty_driver *driver); 123extern void proc_tty_unregister_driver(struct tty_driver *driver); 124 125/* 126 * proc_devtree.c 127 */ 128extern void proc_device_tree_init(void); 129 130/* 131 * proc_rtas.c 132 */ 133extern void proc_rtas_init(void); 134 135/* 136 * PPC64 137 */ 138extern void proc_ppc64_init(void); 139extern void iSeries_proc_create(void); 140 141extern struct proc_dir_entry *proc_symlink(const char *, 142 struct proc_dir_entry *, const char *); 143extern struct proc_dir_entry *proc_mknod(const char *,mode_t, 144 struct proc_dir_entry *,kdev_t); 145extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 146 147static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 148 mode_t mode, struct proc_dir_entry *base, 149 read_proc_t *read_proc, void * data) 150{ 151 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 152 if (res) { 153 res->read_proc=read_proc; 154 res->data=data; 155 } 156 return res; 157} 158 159static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 160 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 161{ 162 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 163 if (res) res->get_info=get_info; 164 return res; 165} 166 167static inline struct proc_dir_entry *proc_net_create(const char *name, 168 mode_t mode, get_info_t *get_info) 169{ 170 return create_proc_info_entry(name,mode,proc_net,get_info); 171} 172 173static inline void proc_net_remove(const char *name) 174{ 175 remove_proc_entry(name,proc_net); 176} 177 178#else 179 180#define proc_root_driver NULL 181 182static inline struct proc_dir_entry *proc_net_create(const char *name, mode_t mode, 183 get_info_t *get_info) {return NULL;} 184static inline void proc_net_remove(const char *name) {} 185 186static inline struct proc_dir_entry *create_proc_entry(const char *name, 187 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 188 189static inline void remove_proc_entry(const char *name, struct proc_dir_entry *parent) {}; 190static inline struct proc_dir_entry *proc_symlink(const char *name, 191 struct proc_dir_entry *parent,char *dest) {return NULL;} 192static inline struct proc_dir_entry *proc_mknod(const char *name,mode_t mode, 193 struct proc_dir_entry *parent,kdev_t rdev) {return NULL;} 194static inline struct proc_dir_entry *proc_mkdir(const char *name, 195 struct proc_dir_entry *parent) {return NULL;} 196 197static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 198 mode_t mode, struct proc_dir_entry *base, 199 int (*read_proc)(char *, char **, off_t, int, int *, void *), 200 void * data) { return NULL; } 201static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 202 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 203 { return NULL; } 204 205static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 206static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 207 208extern struct proc_dir_entry proc_root; 209 210#endif /* CONFIG_PROC_FS */ 211 212#endif /* _LINUX_PROC_FS_H */ 213