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 extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode, 110 struct proc_dir_entry *parent); 111 extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent); 112 113 extern struct vfsmount *proc_mnt; 114 extern int proc_fill_super(struct super_block *,void *,int); 115 extern struct inode *proc_get_inode(struct super_block *, unsigned int, 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 const struct file_operations proc_kcore_operations; 128 extern const struct file_operations proc_kmsg_operations; 129 extern const 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 #ifdef CONFIG_PROC_DEVICETREE 143 struct device_node; 144 struct property; 145 extern void proc_device_tree_init(void); 146 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); 147 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); 148 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, 149 struct property *prop); 150 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, 151 struct property *newprop, 152 struct property *oldprop); 153 #endif /* CONFIG_PROC_DEVICETREE */ 154 155 extern struct proc_dir_entry *proc_symlink(const char *, 156 struct proc_dir_entry *, const char *); 157 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 158 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 159 struct proc_dir_entry *parent); 160 161 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 162 mode_t mode, struct proc_dir_entry *base, 163 read_proc_t *read_proc, void * data) 164 { 165 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 166 if (res) { 167 res->read_proc=read_proc; 168 res->data=data; 169 } 170 return res; 171 } 172 173 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 174 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 175 { 176 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 177 if (res) res->get_info=get_info; 178 return res; 179 } 180 181 static inline struct proc_dir_entry *proc_net_create(const char *name, 182 mode_t mode, get_info_t *get_info) 183 { 184 return create_proc_info_entry(name,mode,proc_net,get_info); 185 } 186 187 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 188 mode_t mode, const struct file_operations *fops) 189 { 190 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 191 if (res) 192 res->proc_fops = fops; 193 return res; 194 } 195 196 static inline void proc_net_remove(const char *name) 197 { 198 remove_proc_entry(name,proc_net); 199 } 200 201 #else 202 203 #define proc_root_driver NULL 204 #define proc_net NULL 205 #define proc_bus NULL 206 207 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 208 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 209 static inline void proc_net_remove(const char *name) {} 210 211 static inline void proc_flush_task(struct task_struct *task) { } 212 213 static inline struct proc_dir_entry *create_proc_entry(const char *name, 214 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 215 216 #define remove_proc_entry(name, parent) do {} while (0) 217 218 static inline struct proc_dir_entry *proc_symlink(const char *name, 219 struct proc_dir_entry *parent,const char *dest) {return NULL;} 220 static inline struct proc_dir_entry *proc_mkdir(const char *name, 221 struct proc_dir_entry *parent) {return NULL;} 222 223 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 224 mode_t mode, struct proc_dir_entry *base, 225 read_proc_t *read_proc, void * data) { return NULL; } 226 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 227 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 228 { return NULL; } 229 230 struct tty_driver; 231 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 232 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 233 234 extern struct proc_dir_entry proc_root; 235 236 #endif /* CONFIG_PROC_FS */ 237 238 #if !defined(CONFIG_PROC_KCORE) 239 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 240 { 241 } 242 #else 243 extern void kclist_add(struct kcore_list *, void *, size_t); 244 #endif 245 246 union proc_op { 247 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 248 int (*proc_read)(struct task_struct *task, char *page); 249 }; 250 251 struct proc_inode { 252 struct pid *pid; 253 int fd; 254 union proc_op op; 255 struct proc_dir_entry *pde; 256 struct inode vfs_inode; 257 }; 258 259 static inline struct proc_inode *PROC_I(const struct inode *inode) 260 { 261 return container_of(inode, struct proc_inode, vfs_inode); 262 } 263 264 static inline struct proc_dir_entry *PDE(const struct inode *inode) 265 { 266 return PROC_I(inode)->pde; 267 } 268 269 struct proc_maps_private { 270 struct pid *pid; 271 struct task_struct *task; 272 #ifdef CONFIG_MMU 273 struct vm_area_struct *tail_vma; 274 #endif 275 }; 276 277 #endif /* _LINUX_PROC_FS_H */ 278