proc_fs.h 7.9 KB

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  1. #ifndef _LINUX_PROC_FS_H
  2. #define _LINUX_PROC_FS_H
  3. #include <linux/slab.h>
  4. #include <linux/fs.h>
  5. #include <linux/spinlock.h>
  6. #include <linux/magic.h>
  7. #include <asm/atomic.h>
  8. /*
  9. * The proc filesystem constants/structures
  10. */
  11. /*
  12. * Offset of the first process in the /proc root directory..
  13. */
  14. #define FIRST_PROCESS_ENTRY 256
  15. /*
  16. * We always define these enumerators
  17. */
  18. enum {
  19. PROC_ROOT_INO = 1,
  20. };
  21. /*
  22. * This is not completely implemented yet. The idea is to
  23. * create an in-memory tree (like the actual /proc filesystem
  24. * tree) of these proc_dir_entries, so that we can dynamically
  25. * add new files to /proc.
  26. *
  27. * The "next" pointer creates a linked list of one /proc directory,
  28. * while parent/subdir create the directory structure (every
  29. * /proc file has a parent, but "subdir" is NULL for all
  30. * non-directory entries).
  31. *
  32. * "get_info" is called at "read", while "owner" is used to protect module
  33. * from unloading while proc_dir_entry is in use
  34. */
  35. typedef int (read_proc_t)(char *page, char **start, off_t off,
  36. int count, int *eof, void *data);
  37. typedef int (write_proc_t)(struct file *file, const char __user *buffer,
  38. unsigned long count, void *data);
  39. typedef int (get_info_t)(char *, char **, off_t, int);
  40. struct proc_dir_entry {
  41. unsigned int low_ino;
  42. unsigned short namelen;
  43. const char *name;
  44. mode_t mode;
  45. nlink_t nlink;
  46. uid_t uid;
  47. gid_t gid;
  48. loff_t size;
  49. const struct inode_operations *proc_iops;
  50. const struct file_operations *proc_fops;
  51. get_info_t *get_info;
  52. struct module *owner;
  53. struct proc_dir_entry *next, *parent, *subdir;
  54. void *data;
  55. read_proc_t *read_proc;
  56. write_proc_t *write_proc;
  57. atomic_t count; /* use count */
  58. int deleted; /* delete flag */
  59. void *set;
  60. };
  61. struct kcore_list {
  62. struct kcore_list *next;
  63. unsigned long addr;
  64. size_t size;
  65. };
  66. struct vmcore {
  67. struct list_head list;
  68. unsigned long long paddr;
  69. unsigned long long size;
  70. loff_t offset;
  71. };
  72. #ifdef CONFIG_PROC_FS
  73. extern struct proc_dir_entry proc_root;
  74. extern struct proc_dir_entry *proc_root_fs;
  75. extern struct proc_dir_entry *proc_net;
  76. extern struct proc_dir_entry *proc_net_stat;
  77. extern struct proc_dir_entry *proc_bus;
  78. extern struct proc_dir_entry *proc_root_driver;
  79. extern struct proc_dir_entry *proc_root_kcore;
  80. extern spinlock_t proc_subdir_lock;
  81. extern void proc_root_init(void);
  82. extern void proc_misc_init(void);
  83. struct mm_struct;
  84. void proc_flush_task(struct task_struct *task);
  85. struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
  86. int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
  87. unsigned long task_vsize(struct mm_struct *);
  88. int task_statm(struct mm_struct *, int *, int *, int *, int *);
  89. char *task_mem(struct mm_struct *, char *);
  90. extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
  91. struct proc_dir_entry *parent);
  92. extern void remove_proc_entry(const char *name, struct proc_dir_entry *parent);
  93. extern struct vfsmount *proc_mnt;
  94. extern int proc_fill_super(struct super_block *,void *,int);
  95. extern struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
  96. /*
  97. * These are generic /proc routines that use the internal
  98. * "struct proc_dir_entry" tree to traverse the filesystem.
  99. *
  100. * The /proc root directory has extended versions to take care
  101. * of the /proc/<pid> subdirectories.
  102. */
  103. extern int proc_readdir(struct file *, void *, filldir_t);
  104. extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
  105. extern const struct file_operations proc_kcore_operations;
  106. extern const struct file_operations proc_kmsg_operations;
  107. extern const struct file_operations ppc_htab_operations;
  108. /*
  109. * proc_tty.c
  110. */
  111. struct tty_driver;
  112. extern void proc_tty_init(void);
  113. extern void proc_tty_register_driver(struct tty_driver *driver);
  114. extern void proc_tty_unregister_driver(struct tty_driver *driver);
  115. /*
  116. * proc_devtree.c
  117. */
  118. #ifdef CONFIG_PROC_DEVICETREE
  119. struct device_node;
  120. struct property;
  121. extern void proc_device_tree_init(void);
  122. extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
  123. extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
  124. extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
  125. struct property *prop);
  126. extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
  127. struct property *newprop,
  128. struct property *oldprop);
  129. #endif /* CONFIG_PROC_DEVICETREE */
  130. extern struct proc_dir_entry *proc_symlink(const char *,
  131. struct proc_dir_entry *, const char *);
  132. extern struct proc_dir_entry *proc_mkdir(const char *,struct proc_dir_entry *);
  133. extern struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
  134. struct proc_dir_entry *parent);
  135. static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
  136. mode_t mode, struct proc_dir_entry *base,
  137. read_proc_t *read_proc, void * data)
  138. {
  139. struct proc_dir_entry *res=create_proc_entry(name,mode,base);
  140. if (res) {
  141. res->read_proc=read_proc;
  142. res->data=data;
  143. }
  144. return res;
  145. }
  146. static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
  147. mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
  148. {
  149. struct proc_dir_entry *res=create_proc_entry(name,mode,base);
  150. if (res) res->get_info=get_info;
  151. return res;
  152. }
  153. static inline struct proc_dir_entry *proc_net_create(const char *name,
  154. mode_t mode, get_info_t *get_info)
  155. {
  156. return create_proc_info_entry(name,mode,proc_net,get_info);
  157. }
  158. static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
  159. mode_t mode, const struct file_operations *fops)
  160. {
  161. struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
  162. if (res)
  163. res->proc_fops = fops;
  164. return res;
  165. }
  166. static inline void proc_net_remove(const char *name)
  167. {
  168. remove_proc_entry(name,proc_net);
  169. }
  170. #else
  171. #define proc_root_driver NULL
  172. #define proc_net NULL
  173. #define proc_bus NULL
  174. #define proc_net_fops_create(name, mode, fops) ({ (void)(mode), NULL; })
  175. #define proc_net_create(name, mode, info) ({ (void)(mode), NULL; })
  176. static inline void proc_net_remove(const char *name) {}
  177. static inline void proc_flush_task(struct task_struct *task) { }
  178. static inline struct proc_dir_entry *create_proc_entry(const char *name,
  179. mode_t mode, struct proc_dir_entry *parent) { return NULL; }
  180. #define remove_proc_entry(name, parent) do {} while (0)
  181. static inline struct proc_dir_entry *proc_symlink(const char *name,
  182. struct proc_dir_entry *parent,const char *dest) {return NULL;}
  183. static inline struct proc_dir_entry *proc_mkdir(const char *name,
  184. struct proc_dir_entry *parent) {return NULL;}
  185. static inline struct proc_dir_entry *create_proc_read_entry(const char *name,
  186. mode_t mode, struct proc_dir_entry *base,
  187. read_proc_t *read_proc, void * data) { return NULL; }
  188. static inline struct proc_dir_entry *create_proc_info_entry(const char *name,
  189. mode_t mode, struct proc_dir_entry *base, get_info_t *get_info)
  190. { return NULL; }
  191. struct tty_driver;
  192. static inline void proc_tty_register_driver(struct tty_driver *driver) {};
  193. static inline void proc_tty_unregister_driver(struct tty_driver *driver) {};
  194. extern struct proc_dir_entry proc_root;
  195. #endif /* CONFIG_PROC_FS */
  196. #if !defined(CONFIG_PROC_KCORE)
  197. static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
  198. {
  199. }
  200. #else
  201. extern void kclist_add(struct kcore_list *, void *, size_t);
  202. #endif
  203. union proc_op {
  204. int (*proc_get_link)(struct inode *, struct dentry **, struct vfsmount **);
  205. int (*proc_read)(struct task_struct *task, char *page);
  206. };
  207. struct proc_inode {
  208. struct pid *pid;
  209. int fd;
  210. union proc_op op;
  211. struct proc_dir_entry *pde;
  212. struct inode vfs_inode;
  213. };
  214. static inline struct proc_inode *PROC_I(const struct inode *inode)
  215. {
  216. return container_of(inode, struct proc_inode, vfs_inode);
  217. }
  218. static inline struct proc_dir_entry *PDE(const struct inode *inode)
  219. {
  220. return PROC_I(inode)->pde;
  221. }
  222. struct proc_maps_private {
  223. struct pid *pid;
  224. struct task_struct *task;
  225. #ifdef CONFIG_MMU
  226. struct vm_area_struct *tail_vma;
  227. #endif
  228. };
  229. #endif /* _LINUX_PROC_FS_H */