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 *); 107 108 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 const struct file_operations proc_kcore_operations; 129 extern const struct file_operations proc_kmsg_operations; 130 extern const 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 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, 150 struct property *prop); 151 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, 152 struct property *newprop, 153 struct property *oldprop); 154 #endif /* CONFIG_PROC_DEVICETREE */ 155 156 extern struct proc_dir_entry *proc_symlink(const char *, 157 struct proc_dir_entry *, const char *); 158 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 159 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 160 struct proc_dir_entry *parent); 161 162 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 163 mode_t mode, struct proc_dir_entry *base, 164 read_proc_t *read_proc, void * data) 165 { 166 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 167 if (res) { 168 res->read_proc=read_proc; 169 res->data=data; 170 } 171 return res; 172 } 173 174 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 175 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 176 { 177 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 178 if (res) res->get_info=get_info; 179 return res; 180 } 181 182 static inline struct proc_dir_entry *proc_net_create(const char *name, 183 mode_t mode, get_info_t *get_info) 184 { 185 return create_proc_info_entry(name,mode,proc_net,get_info); 186 } 187 188 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 189 mode_t mode, const struct file_operations *fops) 190 { 191 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 192 if (res) 193 res->proc_fops = fops; 194 return res; 195 } 196 197 static inline void proc_net_remove(const char *name) 198 { 199 remove_proc_entry(name,proc_net); 200 } 201 202 #else 203 204 #define proc_root_driver NULL 205 #define proc_net NULL 206 #define proc_bus NULL 207 208 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 209 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 210 static inline void proc_net_remove(const char *name) {} 211 212 static inline void proc_flush_task(struct task_struct *task) { } 213 214 static inline struct proc_dir_entry *create_proc_entry(const char *name, 215 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 216 217 #define remove_proc_entry(name, parent) do {} while (0) 218 219 static inline struct proc_dir_entry *proc_symlink(const char *name, 220 struct proc_dir_entry *parent,const char *dest) {return NULL;} 221 static inline struct proc_dir_entry *proc_mkdir(const char *name, 222 struct proc_dir_entry *parent) {return NULL;} 223 224 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 225 mode_t mode, struct proc_dir_entry *base, 226 read_proc_t *read_proc, void * data) { return NULL; } 227 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 228 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 229 { return NULL; } 230 231 struct tty_driver; 232 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 233 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 234 235 extern struct proc_dir_entry proc_root; 236 237 #endif /* CONFIG_PROC_FS */ 238 239 #if !defined(CONFIG_PROC_KCORE) 240 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 241 { 242 } 243 #else 244 extern void kclist_add(struct kcore_list *, void *, size_t); 245 #endif 246 247 union proc_op { 248 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 249 int (*proc_read)(struct task_struct *task, char *page); 250 }; 251 252 struct proc_inode { 253 struct pid *pid; 254 int fd; 255 union proc_op op; 256 struct proc_dir_entry *pde; 257 struct inode vfs_inode; 258 }; 259 260 static inline struct proc_inode *PROC_I(const struct inode *inode) 261 { 262 return container_of(inode, struct proc_inode, vfs_inode); 263 } 264 265 static inline struct proc_dir_entry *PDE(const struct inode *inode) 266 { 267 return PROC_I(inode)->pde; 268 } 269 270 struct proc_maps_private { 271 struct pid *pid; 272 struct task_struct *task; 273 #ifdef CONFIG_MMU 274 struct vm_area_struct *tail_vma; 275 #endif 276 }; 277 278 #endif /* _LINUX_PROC_FS_H */ 279