1 #ifndef _LINUX_PROC_FS_H 2 #define _LINUX_PROC_FS_H 3 4 #include <linux/slab.h> 5 #include <linux/fs.h> 6 #include <linux/spinlock.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 loff_t size; 59 struct inode_operations * proc_iops; 60 const 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 void *set; 70 }; 71 72 struct kcore_list { 73 struct kcore_list *next; 74 unsigned long addr; 75 size_t size; 76 }; 77 78 struct vmcore { 79 struct list_head list; 80 unsigned long long paddr; 81 unsigned long long size; 82 loff_t offset; 83 }; 84 85 #ifdef CONFIG_PROC_FS 86 87 extern struct proc_dir_entry proc_root; 88 extern struct proc_dir_entry *proc_root_fs; 89 extern struct proc_dir_entry *proc_net; 90 extern struct proc_dir_entry *proc_net_stat; 91 extern struct proc_dir_entry *proc_bus; 92 extern struct proc_dir_entry *proc_root_driver; 93 extern struct proc_dir_entry *proc_root_kcore; 94 95 extern spinlock_t proc_subdir_lock; 96 97 extern void proc_root_init(void); 98 extern void proc_misc_init(void); 99 100 struct mm_struct; 101 102 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 103 struct dentry *proc_pid_unhash(struct task_struct *p); 104 void proc_pid_flush(struct dentry *proc_dentry); 105 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 106 unsigned long task_vsize(struct mm_struct *); 107 int task_statm(struct mm_struct *, int *, int *, int *, int *); 108 char *task_mem(struct mm_struct *, char *); 109 110 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 111 struct proc_dir_entry *parent); 112 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 113 114 extern struct vfsmount *proc_mnt; 115 extern int proc_fill_super(struct super_block *,void *,int); 116 extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); 117 118 extern int proc_match(int, const char *,struct proc_dir_entry *); 119 120 /* 121 * These are generic /proc routines that use the internal 122 * "struct proc_dir_entry" tree to traverse the filesystem. 123 * 124 * The /proc root directory has extended versions to take care 125 * of the /proc/<pid> subdirectories. 126 */ 127 extern int proc_readdir(struct file *, void *, filldir_t); 128 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 129 130 extern const struct file_operations proc_kcore_operations; 131 extern const struct file_operations proc_kmsg_operations; 132 extern const struct file_operations ppc_htab_operations; 133 134 /* 135 * proc_tty.c 136 */ 137 struct tty_driver; 138 extern void proc_tty_init(void); 139 extern void proc_tty_register_driver(struct tty_driver *driver); 140 extern void proc_tty_unregister_driver(struct tty_driver *driver); 141 142 /* 143 * proc_devtree.c 144 */ 145 #ifdef CONFIG_PROC_DEVICETREE 146 struct device_node; 147 struct property; 148 extern void proc_device_tree_init(void); 149 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); 150 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); 151 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, 152 struct property *prop); 153 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, 154 struct property *newprop, 155 struct property *oldprop); 156 #endif /* CONFIG_PROC_DEVICETREE */ 157 158 extern struct proc_dir_entry *proc_symlink(const char *, 159 struct proc_dir_entry *, const char *); 160 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 161 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 162 struct proc_dir_entry *parent); 163 164 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 165 mode_t mode, struct proc_dir_entry *base, 166 read_proc_t *read_proc, void * data) 167 { 168 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 169 if (res) { 170 res->read_proc=read_proc; 171 res->data=data; 172 } 173 return res; 174 } 175 176 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 177 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 178 { 179 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 180 if (res) res->get_info=get_info; 181 return res; 182 } 183 184 static inline struct proc_dir_entry *proc_net_create(const char *name, 185 mode_t mode, get_info_t *get_info) 186 { 187 return create_proc_info_entry(name,mode,proc_net,get_info); 188 } 189 190 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 191 mode_t mode, const struct file_operations *fops) 192 { 193 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 194 if (res) 195 res->proc_fops = fops; 196 return res; 197 } 198 199 static inline void proc_net_remove(const char *name) 200 { 201 remove_proc_entry(name,proc_net); 202 } 203 204 #else 205 206 #define proc_root_driver NULL 207 #define proc_net NULL 208 #define proc_bus NULL 209 210 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 211 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 212 static inline void proc_net_remove(const char *name) {} 213 214 static inline struct dentry *proc_pid_unhash(struct task_struct *p) { return NULL; } 215 static inline void proc_pid_flush(struct dentry *proc_dentry) { } 216 217 static inline struct proc_dir_entry *create_proc_entry(const char *name, 218 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 219 220 #define remove_proc_entry(name, parent) do {} while (0) 221 222 static inline struct proc_dir_entry *proc_symlink(const char *name, 223 struct proc_dir_entry *parent,const char *dest) {return NULL;} 224 static inline struct proc_dir_entry *proc_mkdir(const char *name, 225 struct proc_dir_entry *parent) {return NULL;} 226 227 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 228 mode_t mode, struct proc_dir_entry *base, 229 read_proc_t *read_proc, void * data) { return NULL; } 230 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 231 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 232 { return NULL; } 233 234 struct tty_driver; 235 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 236 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 237 238 extern struct proc_dir_entry proc_root; 239 240 #endif /* CONFIG_PROC_FS */ 241 242 #if !defined(CONFIG_PROC_KCORE) 243 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 244 { 245 } 246 #else 247 extern void kclist_add(struct kcore_list *, void *, size_t); 248 #endif 249 250 struct proc_inode { 251 struct task_struct *task; 252 int type; 253 union { 254 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 255 int (*proc_read)(struct task_struct *task, char *page); 256 } op; 257 struct proc_dir_entry *pde; 258 struct inode vfs_inode; 259 }; 260 261 static inline struct proc_inode *PROC_I(const struct inode *inode) 262 { 263 return container_of(inode, struct proc_inode, vfs_inode); 264 } 265 266 static inline struct proc_dir_entry *PDE(const struct inode *inode) 267 { 268 return PROC_I(inode)->pde; 269 } 270 271 #endif /* _LINUX_PROC_FS_H */ 272