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