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 <linux/magic.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 /* 29 * This is not completely implemented yet. The idea is to 30 * create an in-memory tree (like the actual /proc filesystem 31 * tree) of these proc_dir_entries, so that we can dynamically 32 * add new files to /proc. 33 * 34 * The "next" pointer creates a linked list of one /proc directory, 35 * while parent/subdir create the directory structure (every 36 * /proc file has a parent, but "subdir" is NULL for all 37 * non-directory entries). 38 * 39 * "get_info" is called at "read", while "owner" is used to protect module 40 * from unloading while proc_dir_entry is in use 41 */ 42 43 typedef int (read_proc_t)(char *page, char **start, off_t off, 44 int count, int *eof, void *data); 45 typedef int (write_proc_t)(struct file *file, const char __user *buffer, 46 unsigned long count, void *data); 47 typedef int (get_info_t)(char *, char **, off_t, int); 48 49 struct proc_dir_entry { 50 unsigned int low_ino; 51 unsigned short namelen; 52 const char *name; 53 mode_t mode; 54 nlink_t nlink; 55 uid_t uid; 56 gid_t gid; 57 loff_t size; 58 const struct inode_operations *proc_iops; 59 const struct file_operations *proc_fops; 60 get_info_t *get_info; 61 struct module *owner; 62 struct proc_dir_entry *next, *parent, *subdir; 63 void *data; 64 read_proc_t *read_proc; 65 write_proc_t *write_proc; 66 atomic_t count; /* use count */ 67 int deleted; /* delete flag */ 68 void *set; 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 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 spinlock_t proc_subdir_lock; 95 96 extern void proc_root_init(void); 97 extern void proc_misc_init(void); 98 99 struct mm_struct; 100 101 void proc_flush_task(struct task_struct *task); 102 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 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 void clear_refs_smap(struct mm_struct *mm); 108 109 struct proc_dir_entry *de_get(struct proc_dir_entry *de); 110 void de_put(struct proc_dir_entry *de); 111 112 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 113 struct proc_dir_entry *parent); 114 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 115 116 extern struct vfsmount *proc_mnt; 117 extern int proc_fill_super(struct super_block *,void *,int); 118 extern struct inode *proc_get_inode(struct super_block *, unsigned int, 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 void proc_flush_task(struct task_struct *task) { } 215 216 static inline struct proc_dir_entry *create_proc_entry(const char *name, 217 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 218 219 #define remove_proc_entry(name, parent) do {} while (0) 220 221 static inline struct proc_dir_entry *proc_symlink(const char *name, 222 struct proc_dir_entry *parent,const char *dest) {return NULL;} 223 static inline struct proc_dir_entry *proc_mkdir(const char *name, 224 struct proc_dir_entry *parent) {return NULL;} 225 226 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 227 mode_t mode, struct proc_dir_entry *base, 228 read_proc_t *read_proc, void * data) { return NULL; } 229 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 230 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 231 { return NULL; } 232 233 struct tty_driver; 234 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 235 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 236 237 extern struct proc_dir_entry proc_root; 238 239 #endif /* CONFIG_PROC_FS */ 240 241 #if !defined(CONFIG_PROC_KCORE) 242 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 243 { 244 } 245 #else 246 extern void kclist_add(struct kcore_list *, void *, size_t); 247 #endif 248 249 union proc_op { 250 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 251 int (*proc_read)(struct task_struct *task, char *page); 252 }; 253 254 struct proc_inode { 255 struct pid *pid; 256 int fd; 257 union proc_op 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 struct proc_maps_private { 273 struct pid *pid; 274 struct task_struct *task; 275 #ifdef CONFIG_MMU 276 struct vm_area_struct *tail_vma; 277 #endif 278 }; 279 280 #endif /* _LINUX_PROC_FS_H */ 281