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 <linux/spinlock.h> 8 #include <asm/atomic.h> 9 10 /* 11 * The proc filesystem constants/structures 12 */ 13 14 /* 15 * Offset of the first process in the /proc root directory.. 16 */ 17 #define FIRST_PROCESS_ENTRY 256 18 19 20 /* 21 * We always define these enumerators 22 */ 23 24 enum { 25 PROC_ROOT_INO = 1, 26 }; 27 28 #define PROC_SUPER_MAGIC 0x9fa0 29 30 /* 31 * This is not completely implemented yet. The idea is to 32 * create an in-memory tree (like the actual /proc filesystem 33 * tree) of these proc_dir_entries, so that we can dynamically 34 * add new files to /proc. 35 * 36 * The "next" pointer creates a linked list of one /proc directory, 37 * while parent/subdir create the directory structure (every 38 * /proc file has a parent, but "subdir" is NULL for all 39 * non-directory entries). 40 * 41 * "get_info" is called at "read", while "owner" is used to protect module 42 * from unloading while proc_dir_entry is in use 43 */ 44 45 typedef int (read_proc_t)(char *page, char **start, off_t off, 46 int count, int *eof, void *data); 47 typedef int (write_proc_t)(struct file *file, const char __user *buffer, 48 unsigned long count, void *data); 49 typedef int (get_info_t)(char *, char **, off_t, int); 50 51 struct proc_dir_entry { 52 unsigned int low_ino; 53 unsigned short namelen; 54 const char *name; 55 mode_t mode; 56 nlink_t nlink; 57 uid_t uid; 58 gid_t gid; 59 loff_t size; 60 struct inode_operations * proc_iops; 61 const struct file_operations * proc_fops; 62 get_info_t *get_info; 63 struct module *owner; 64 struct proc_dir_entry *next, *parent, *subdir; 65 void *data; 66 read_proc_t *read_proc; 67 write_proc_t *write_proc; 68 atomic_t count; /* use count */ 69 int deleted; /* delete flag */ 70 void *set; 71 }; 72 73 struct kcore_list { 74 struct kcore_list *next; 75 unsigned long addr; 76 size_t size; 77 }; 78 79 struct vmcore { 80 struct list_head list; 81 unsigned long long paddr; 82 unsigned long size; 83 loff_t offset; 84 }; 85 86 #ifdef CONFIG_PROC_FS 87 88 extern struct proc_dir_entry proc_root; 89 extern struct proc_dir_entry *proc_root_fs; 90 extern struct proc_dir_entry *proc_net; 91 extern struct proc_dir_entry *proc_net_stat; 92 extern struct proc_dir_entry *proc_bus; 93 extern struct proc_dir_entry *proc_root_driver; 94 extern struct proc_dir_entry *proc_root_kcore; 95 96 extern spinlock_t proc_subdir_lock; 97 98 extern void proc_root_init(void); 99 extern void proc_misc_init(void); 100 101 struct mm_struct; 102 103 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 104 struct dentry *proc_pid_unhash(struct task_struct *p); 105 void proc_pid_flush(struct dentry *proc_dentry); 106 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 107 unsigned long task_vsize(struct mm_struct *); 108 int task_statm(struct mm_struct *, int *, int *, int *, int *); 109 char *task_mem(struct mm_struct *, char *); 110 111 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 112 struct proc_dir_entry *parent); 113 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 114 115 extern struct vfsmount *proc_mnt; 116 extern int proc_fill_super(struct super_block *,void *,int); 117 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); 118 119 extern int proc_match(int, const char *,struct proc_dir_entry *); 120 121 /* 122 * These are generic /proc routines that use the internal 123 * "struct proc_dir_entry" tree to traverse the filesystem. 124 * 125 * The /proc root directory has extended versions to take care 126 * of the /proc/<pid> subdirectories. 127 */ 128 extern int proc_readdir(struct file *, void *, filldir_t); 129 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 130 131 extern const struct file_operations proc_kcore_operations; 132 extern const struct file_operations proc_kmsg_operations; 133 extern const struct file_operations ppc_htab_operations; 134 135 /* 136 * proc_tty.c 137 */ 138 struct tty_driver; 139 extern void proc_tty_init(void); 140 extern void proc_tty_register_driver(struct tty_driver *driver); 141 extern void proc_tty_unregister_driver(struct tty_driver *driver); 142 143 /* 144 * proc_devtree.c 145 */ 146 #ifdef CONFIG_PROC_DEVICETREE 147 struct device_node; 148 struct property; 149 extern void proc_device_tree_init(void); 150 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); 151 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); 152 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, 153 struct property *prop); 154 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, 155 struct property *newprop, 156 struct property *oldprop); 157 #endif /* CONFIG_PROC_DEVICETREE */ 158 159 extern struct proc_dir_entry *proc_symlink(const char *, 160 struct proc_dir_entry *, const char *); 161 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 162 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 163 struct proc_dir_entry *parent); 164 165 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 166 mode_t mode, struct proc_dir_entry *base, 167 read_proc_t *read_proc, void * data) 168 { 169 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 170 if (res) { 171 res->read_proc=read_proc; 172 res->data=data; 173 } 174 return res; 175 } 176 177 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 178 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 179 { 180 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 181 if (res) res->get_info=get_info; 182 return res; 183 } 184 185 static inline struct proc_dir_entry *proc_net_create(const char *name, 186 mode_t mode, get_info_t *get_info) 187 { 188 return create_proc_info_entry(name,mode,proc_net,get_info); 189 } 190 191 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 192 mode_t mode, const struct file_operations *fops) 193 { 194 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 195 if (res) 196 res->proc_fops = fops; 197 return res; 198 } 199 200 static inline void proc_net_remove(const char *name) 201 { 202 remove_proc_entry(name,proc_net); 203 } 204 205 #else 206 207 #define proc_root_driver NULL 208 #define proc_net NULL 209 #define proc_bus NULL 210 211 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 212 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 213 static inline void proc_net_remove(const char *name) {} 214 215 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; } 216 static inline void proc_pid_flush(struct dentry *proc_dentry) { } 217 218 static inline struct proc_dir_entry *create_proc_entry(const char *name, 219 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 220 221 #define remove_proc_entry(name, parent) do {} while (0) 222 223 static inline struct proc_dir_entry *proc_symlink(const char *name, 224 struct proc_dir_entry *parent,const char *dest) {return NULL;} 225 static inline struct proc_dir_entry *proc_mkdir(const char *name, 226 struct proc_dir_entry *parent) {return NULL;} 227 228 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 229 mode_t mode, struct proc_dir_entry *base, 230 read_proc_t *read_proc, void * data) { return NULL; } 231 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 232 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 233 { return NULL; } 234 235 struct tty_driver; 236 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 237 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 238 239 extern struct proc_dir_entry proc_root; 240 241 #endif /* CONFIG_PROC_FS */ 242 243 #if !defined(CONFIG_PROC_KCORE) 244 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 245 { 246 } 247 #else 248 extern void kclist_add(struct kcore_list *, void *, size_t); 249 #endif 250 251 struct proc_inode { 252 struct task_struct *task; 253 int type; 254 union { 255 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 256 int (*proc_read)(struct task_struct *task, char *page); 257 } op; 258 struct proc_dir_entry *pde; 259 struct inode vfs_inode; 260 }; 261 262 static inline struct proc_inode *PROC_I(const struct inode *inode) 263 { 264 return container_of(inode, struct proc_inode, vfs_inode); 265 } 266 267 static inline struct proc_dir_entry *PDE(const struct inode *inode) 268 { 269 return PROC_I(inode)->pde; 270 } 271 272 #endif /* _LINUX_PROC_FS_H */ 273