1 #ifndef _LINUX_PROC_FS_H 2 #define _LINUX_PROC_FS_H 3 4 #include <linux/config.h> 5 #include <linux/slab.h> 6 #include <linux/fs.h> 7 #include <asm/atomic.h> 8 9 /* 10 * The proc filesystem constants/structures 11 */ 12 13 /* 14 * Offset of the first process in the /proc root directory.. 15 */ 16 #define FIRST_PROCESS_ENTRY 256 17 18 19 /* 20 * We always define these enumerators 21 */ 22 23 enum { 24 PROC_ROOT_INO = 1, 25 }; 26 27 #define PROC_SUPER_MAGIC 0x9fa0 28 29 /* 30 * This is not completely implemented yet. The idea is to 31 * create an in-memory tree (like the actual /proc filesystem 32 * tree) of these proc_dir_entries, so that we can dynamically 33 * add new files to /proc. 34 * 35 * The "next" pointer creates a linked list of one /proc directory, 36 * while parent/subdir create the directory structure (every 37 * /proc file has a parent, but "subdir" is NULL for all 38 * non-directory entries). 39 * 40 * "get_info" is called at "read", while "owner" is used to protect module 41 * from unloading while proc_dir_entry is in use 42 */ 43 44 typedef int (read_proc_t)(char *page, char **start, off_t off, 45 int count, int *eof, void *data); 46 typedef int (write_proc_t)(struct file *file, const char __user *buffer, 47 unsigned long count, void *data); 48 typedef int (get_info_t)(char *, char **, off_t, int); 49 50 struct proc_dir_entry { 51 unsigned int low_ino; 52 unsigned short namelen; 53 const char *name; 54 mode_t mode; 55 nlink_t nlink; 56 uid_t uid; 57 gid_t gid; 58 unsigned long size; 59 struct inode_operations * proc_iops; 60 struct file_operations * proc_fops; 61 get_info_t *get_info; 62 struct module *owner; 63 struct proc_dir_entry *next, *parent, *subdir; 64 void *data; 65 read_proc_t *read_proc; 66 write_proc_t *write_proc; 67 atomic_t count; /* use count */ 68 int deleted; /* delete flag */ 69 }; 70 71 struct kcore_list { 72 struct kcore_list *next; 73 unsigned long addr; 74 size_t size; 75 }; 76 77 #ifdef CONFIG_PROC_FS 78 79 extern struct proc_dir_entry proc_root; 80 extern struct proc_dir_entry *proc_root_fs; 81 extern struct proc_dir_entry *proc_net; 82 extern struct proc_dir_entry *proc_net_stat; 83 extern struct proc_dir_entry *proc_bus; 84 extern struct proc_dir_entry *proc_root_driver; 85 extern struct proc_dir_entry *proc_root_kcore; 86 87 extern void proc_root_init(void); 88 extern void proc_misc_init(void); 89 90 struct mm_struct; 91 92 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 93 struct dentry *proc_pid_unhash(struct task_struct *p); 94 void proc_pid_flush(struct dentry *proc_dentry); 95 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 96 unsigned long task_vsize(struct mm_struct *); 97 int task_statm(struct mm_struct *, int *, int *, int *, int *); 98 char *task_mem(struct mm_struct *, char *); 99 100 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 101 struct proc_dir_entry *parent); 102 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 103 104 extern struct vfsmount *proc_mnt; 105 extern int proc_fill_super(struct super_block *,void *,int); 106 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); 107 108 extern int proc_match(int, const char *,struct proc_dir_entry *); 109 110 /* 111 * These are generic /proc routines that use the internal 112 * "struct proc_dir_entry" tree to traverse the filesystem. 113 * 114 * The /proc root directory has extended versions to take care 115 * of the /proc/<pid> subdirectories. 116 */ 117 extern int proc_readdir(struct file *, void *, filldir_t); 118 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 119 120 extern struct file_operations proc_kcore_operations; 121 extern struct file_operations proc_kmsg_operations; 122 extern struct file_operations ppc_htab_operations; 123 124 /* 125 * proc_tty.c 126 */ 127 struct tty_driver; 128 extern void proc_tty_init(void); 129 extern void proc_tty_register_driver(struct tty_driver *driver); 130 extern void proc_tty_unregister_driver(struct tty_driver *driver); 131 132 /* 133 * proc_devtree.c 134 */ 135 struct device_node; 136 extern void proc_device_tree_init(void); 137 #ifdef CONFIG_PROC_DEVICETREE 138 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); 139 #else /* !CONFIG_PROC_DEVICETREE */ 140 static inline void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *pde) 141 { 142 return; 143 } 144 #endif /* CONFIG_PROC_DEVICETREE */ 145 146 extern struct proc_dir_entry *proc_symlink(const char *, 147 struct proc_dir_entry *, const char *); 148 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 149 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 150 struct proc_dir_entry *parent); 151 152 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 153 mode_t mode, struct proc_dir_entry *base, 154 read_proc_t *read_proc, void * data) 155 { 156 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 157 if (res) { 158 res->read_proc=read_proc; 159 res->data=data; 160 } 161 return res; 162 } 163 164 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 165 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 166 { 167 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 168 if (res) res->get_info=get_info; 169 return res; 170 } 171 172 static inline struct proc_dir_entry *proc_net_create(const char *name, 173 mode_t mode, get_info_t *get_info) 174 { 175 return create_proc_info_entry(name,mode,proc_net,get_info); 176 } 177 178 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 179 mode_t mode, struct file_operations *fops) 180 { 181 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 182 if (res) 183 res->proc_fops = fops; 184 return res; 185 } 186 187 static inline void proc_net_remove(const char *name) 188 { 189 remove_proc_entry(name,proc_net); 190 } 191 192 #else 193 194 #define proc_root_driver NULL 195 #define proc_net NULL 196 #define proc_bus NULL 197 198 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 199 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 200 static inline void proc_net_remove(const char *name) {} 201 202 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; } 203 static inline void proc_pid_flush(struct dentry *proc_dentry) { } 204 205 static inline struct proc_dir_entry *create_proc_entry(const char *name, 206 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 207 208 #define remove_proc_entry(name, parent) do {} while (0) 209 210 static inline struct proc_dir_entry *proc_symlink(const char *name, 211 struct proc_dir_entry *parent,const char *dest) {return NULL;} 212 static inline struct proc_dir_entry *proc_mkdir(const char *name, 213 struct proc_dir_entry *parent) {return NULL;} 214 215 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 216 mode_t mode, struct proc_dir_entry *base, 217 read_proc_t *read_proc, void * data) { return NULL; } 218 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 219 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 220 { return NULL; } 221 222 struct tty_driver; 223 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 224 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 225 226 extern struct proc_dir_entry proc_root; 227 228 #endif /* CONFIG_PROC_FS */ 229 230 #if !defined(CONFIG_PROC_KCORE) 231 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 232 { 233 } 234 #else 235 extern void kclist_add(struct kcore_list *, void *, size_t); 236 #endif 237 238 struct proc_inode { 239 struct task_struct *task; 240 int type; 241 union { 242 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 243 int (*proc_read)(struct task_struct *task, char *page); 244 } op; 245 struct proc_dir_entry *pde; 246 struct inode vfs_inode; 247 }; 248 249 static inline struct proc_inode *PROC_I(const struct inode *inode) 250 { 251 return container_of(inode, struct proc_inode, vfs_inode); 252 } 253 254 static inline struct proc_dir_entry *PDE(const struct inode *inode) 255 { 256 return PROC_I(inode)->pde; 257 } 258 259 #endif /* _LINUX_PROC_FS_H */ 260