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
  12 static 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
  18 static 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
  24 static 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 */
  31 extern void fsnotify_flush_notify(struct fsnotify_group *group);
  32
  33 /* protects reads of inode and vfsmount marks list */
  34 extern struct srcu_struct fsnotify_mark_srcu;
  35
  36 /* compare two groups for sorting of marks lists */
  37 extern int fsnotify_compare_groups(struct fsnotify_group *a,
  38                                    struct fsnotify_group *b);
  39
  40 /* Destroy all marks attached to an object via connector */
  41 extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
  42 /* run the list of all marks associated with inode and destroy them */
  43 static 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 */
  48 static 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 */
  53 static 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 */
  58 extern 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  */
  64 extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
  65
  66 /* allocate and destroy and event holder to attach events to notification/access queues */
  67 extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
  68 extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
  69
  70 #endif  /* __FS_NOTIFY_FSNOTIFY_H_ */