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