LXR linux/fs/notify/fsnotify.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __FS_NOTIFY_FSNOTIFY_H_
   3#define __FS_NOTIFY_FSNOTIFY_H_
   4
   5#include <linux/list.h>
   6#include <linux/fsnotify.h>
   7#include <linux/srcu.h>
   8#include <linux/types.h>
   9
  10#include "../mount.h"
  11
  12static inline struct inode *fsnotify_conn_inode(
  13                                struct fsnotify_mark_connector *conn)
  14{
  15        return container_of(conn->obj, struct inode, i_fsnotify_marks);
  16}
  17
  18static inline struct mount *fsnotify_conn_mount(
  19                                struct fsnotify_mark_connector *conn)
  20{
  21        return container_of(conn->obj, struct mount, mnt_fsnotify_marks);
  22}
  23
  24static inline struct super_block *fsnotify_conn_sb(
  25                                struct fsnotify_mark_connector *conn)
  26{
  27        return container_of(conn->obj, struct super_block, s_fsnotify_marks);
  28}
  29
  30/* destroy all events sitting in this groups notification queue */
  31extern void fsnotify_flush_notify(struct fsnotify_group *group);
  32
  33/* protects reads of inode and vfsmount marks list */
  34extern struct srcu_struct fsnotify_mark_srcu;
  35
  36/* compare two groups for sorting of marks lists */
  37extern int fsnotify_compare_groups(struct fsnotify_group *a,
  38                                   struct fsnotify_group *b);
  39
  40/* Destroy all marks attached to an object via connector */
  41extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
  42/* run the list of all marks associated with inode and destroy them */
  43static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
  44{
  45        fsnotify_destroy_marks(&inode->i_fsnotify_marks);
  46}
  47/* run the list of all marks associated with vfsmount and destroy them */
  48static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
  49{
  50        fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
  51}
  52/* run the list of all marks associated with sb and destroy them */
  53static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
  54{
  55        fsnotify_destroy_marks(&sb->s_fsnotify_marks);
  56}
  57/* Wait until all marks queued for destruction are destroyed */
  58extern void fsnotify_wait_marks_destroyed(void);
  59
  60/*
  61 * update the dentry->d_flags of all of inode's children to indicate if inode cares
  62 * about events that happen to its children.
  63 */
  64extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
  65
  66/* allocate and destroy and event holder to attach events to notification/access queues */
  67extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
  68extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
  69
  70#endif  /* __FS_NOTIFY_FSNOTIFY_H_ */
  71