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 <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 loff_t size; 59 struct inode_operations * proc_iops; 60 const 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 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 spinlock_t proc_subdir_lock; 96 97 extern void proc_root_init(void); 98 extern void proc_misc_init(void); 99 100 struct mm_struct; 101 102 void proc_flush_task(struct task_struct *task); 103 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 104 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 105 unsigned long task_vsize(struct mm_struct *); 106 int task_statm(struct mm_struct *, int *, int *, int *, int *); 107 char *task_mem(struct mm_struct *, char *); 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 extern int proc_match(int, const char *,struct proc_dir_entry *); 118 119 /* 120 * These are generic /proc routines that use the internal 121 * "struct proc_dir_entry" tree to traverse the filesystem. 122 * 123 * The /proc root directory has extended versions to take care 124 * of the /proc/<pid> subdirectories. 125 */ 126 extern int proc_readdir(struct file *, void *, filldir_t); 127 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 128 129 extern const struct file_operations proc_kcore_operations; 130 extern const struct file_operations proc_kmsg_operations; 131 extern const struct file_operations ppc_htab_operations; 132 133 /* 134 * proc_tty.c 135 */ 136 struct tty_driver; 137 extern void proc_tty_init(void); 138 extern void proc_tty_register_driver(struct tty_driver *driver); 139 extern void proc_tty_unregister_driver(struct tty_driver *driver); 140 141 /* 142 * proc_devtree.c 143 */ 144 #ifdef CONFIG_PROC_DEVICETREE 145 struct device_node; 146 struct property; 147 extern void proc_device_tree_init(void); 148 extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); 149 extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); 150 extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, 151 struct property *prop); 152 extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, 153 struct property *newprop, 154 struct property *oldprop); 155 #endif /* CONFIG_PROC_DEVICETREE */ 156 157 extern struct proc_dir_entry *proc_symlink(const char *, 158 struct proc_dir_entry *, const char *); 159 extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *); 160 extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode, 161 struct proc_dir_entry *parent); 162 163 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 164 mode_t mode, struct proc_dir_entry *base, 165 read_proc_t *read_proc, void * data) 166 { 167 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 168 if (res) { 169 res->read_proc=read_proc; 170 res->data=data; 171 } 172 return res; 173 } 174 175 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 176 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 177 { 178 struct proc_dir_entry *res=create_proc_entry(name,mode,base); 179 if (res) res->get_info=get_info; 180 return res; 181 } 182 183 static inline struct proc_dir_entry *proc_net_create(const char *name, 184 mode_t mode, get_info_t *get_info) 185 { 186 return create_proc_info_entry(name,mode,proc_net,get_info); 187 } 188 189 static inline struct proc_dir_entry *proc_net_fops_create(const char *name, 190 mode_t mode, const struct file_operations *fops) 191 { 192 struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net); 193 if (res) 194 res->proc_fops = fops; 195 return res; 196 } 197 198 static inline void proc_net_remove(const char *name) 199 { 200 remove_proc_entry(name,proc_net); 201 } 202 203 #else 204 205 #define proc_root_driver NULL 206 #define proc_net NULL 207 #define proc_bus NULL 208 209 #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; }) 210 #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; }) 211 static inline void proc_net_remove(const char *name) {} 212 213 static inline void proc_flush_task(struct task_struct *task) { } 214 215 static inline struct proc_dir_entry *create_proc_entry(const char *name, 216 mode_t mode, struct proc_dir_entry *parent) { return NULL; } 217 218 #define remove_proc_entry(name, parent) do {} while (0) 219 220 static inline struct proc_dir_entry *proc_symlink(const char *name, 221 struct proc_dir_entry *parent,const char *dest) {return NULL;} 222 static inline struct proc_dir_entry *proc_mkdir(const char *name, 223 struct proc_dir_entry *parent) {return NULL;} 224 225 static inline struct proc_dir_entry *create_proc_read_entry(const char *name, 226 mode_t mode, struct proc_dir_entry *base, 227 read_proc_t *read_proc, void * data) { return NULL; } 228 static inline struct proc_dir_entry *create_proc_info_entry(const char *name, 229 mode_t mode, struct proc_dir_entry *base, get_info_t *get_info) 230 { return NULL; } 231 232 struct tty_driver; 233 static inline void proc_tty_register_driver(struct tty_driver *driver) {}; 234 static inline void proc_tty_unregister_driver(struct tty_driver *driver) {}; 235 236 extern struct proc_dir_entry proc_root; 237 238 #endif /* CONFIG_PROC_FS */ 239 240 #if !defined(CONFIG_PROC_KCORE) 241 static inline void kclist_add(struct kcore_list *new, void *addr, size_t size) 242 { 243 } 244 #else 245 extern void kclist_add(struct kcore_list *, void *, size_t); 246 #endif 247 248 struct proc_inode { 249 struct pid *pid; 250 int fd; 251 union { 252 int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **); 253 int (*proc_read)(struct task_struct *task, char *page); 254 } 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 struct vm_area_struct *tail_vma; 273 }; 274 275 #endif /* _LINUX_PROC_FS_H */ 276
