LXR linux/fs/notify/fsnotify.h

   1#ifndef __FS_NOTIFY_FSNOTIFY_H_
   2#define __FS_NOTIFY_FSNOTIFY_H_
   3
   4#include <linux/list.h>
   5#include <linux/fsnotify.h>
   6#include <linux/srcu.h>
   7#include <linux/types.h>
   8
   9#include "../mount.h"
  10
  11/* destroy all events sitting in this groups notification queue */
  12extern void fsnotify_flush_notify(struct fsnotify_group *group);
  13
  14/* protects reads of inode and vfsmount marks list */
  15extern struct srcu_struct fsnotify_mark_srcu;
  16
  17/* Calculate mask of events for a list of marks */
  18extern u32 fsnotify_recalc_mask(struct hlist_head *head);
  19
  20/* compare two groups for sorting of marks lists */
  21extern int fsnotify_compare_groups(struct fsnotify_group *a,
  22                                   struct fsnotify_group *b);
  23
  24extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
  25                                                __u32 mask);
  26/* Add mark to a proper place in mark list */
  27extern int fsnotify_add_mark_list(struct hlist_head *head,
  28                                  struct fsnotify_mark *mark,
  29                                  int allow_dups);
  30/* add a mark to an inode */
  31extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
  32                                   struct fsnotify_group *group, struct inode *inode,
  33                                   int allow_dups);
  34/* add a mark to a vfsmount */
  35extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
  36                                      struct fsnotify_group *group, struct vfsmount *mnt,
  37                                      int allow_dups);
  38
  39/* vfsmount specific destruction of a mark */
  40extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
  41/* inode specific destruction of a mark */
  42extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
  43/* Find mark belonging to given group in the list of marks */
  44extern struct fsnotify_mark *fsnotify_find_mark(struct hlist_head *head,
  45                                                struct fsnotify_group *group);
  46/* Destroy all marks in the given list protected by 'lock' */
  47extern void fsnotify_destroy_marks(struct hlist_head *head, spinlock_t *lock);
  48/* run the list of all marks associated with inode and destroy them */
  49static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
  50{
  51        fsnotify_destroy_marks(&inode->i_fsnotify_marks, &inode->i_lock);
  52}
  53/* run the list of all marks associated with vfsmount and destroy them */
  54static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
  55{
  56        fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks,
  57                               &mnt->mnt_root->d_lock);
  58}
  59/* prepare for freeing all marks associated with given group */
  60extern void fsnotify_detach_group_marks(struct fsnotify_group *group);
  61/*
  62 * wait for fsnotify_mark_srcu period to end and free all marks in destroy_list
  63 */
  64extern void fsnotify_mark_destroy_list(void);
  65
  66/*
  67 * update the dentry->d_flags of all of inode's children to indicate if inode cares
  68 * about events that happen to its children.
  69 */
  70extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
  71
  72/* allocate and destroy and event holder to attach events to notification/access queues */
  73extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
  74extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
  75
  76#endif  /* __FS_NOTIFY_FSNOTIFY_H_ */
  77