Line data    Source code

       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           0 :         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           0 :         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           0 :         return container_of(conn->obj, struct super_block, s_fsnotify_marks);
      28             : }
      29             : 
      30             : static inline struct super_block *fsnotify_connector_sb(
      31             :                                 struct fsnotify_mark_connector *conn)
      32             : {
      33           0 :         switch (conn->type) {
      34             :         case FSNOTIFY_OBJ_TYPE_INODE:
      35           0 :                 return fsnotify_conn_inode(conn)->i_sb;
      36             :         case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
      37           0 :                 return fsnotify_conn_mount(conn)->mnt.mnt_sb;
      38             :         case FSNOTIFY_OBJ_TYPE_SB:
      39           0 :                 return fsnotify_conn_sb(conn);
      40             :         default:
      41             :                 return NULL;
      42             :         }
      43             : }
      44             : 
      45             : /* destroy all events sitting in this groups notification queue */
      46             : extern void fsnotify_flush_notify(struct fsnotify_group *group);
      47             : 
      48             : /* protects reads of inode and vfsmount marks list */
      49             : extern struct srcu_struct fsnotify_mark_srcu;
      50             : 
      51             : /* compare two groups for sorting of marks lists */
      52             : extern int fsnotify_compare_groups(struct fsnotify_group *a,
      53             :                                    struct fsnotify_group *b);
      54             : 
      55             : /* Destroy all marks attached to an object via connector */
      56             : extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
      57             : /* run the list of all marks associated with inode and destroy them */
      58             : static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
      59             : {
      60          10 :         fsnotify_destroy_marks(&inode->i_fsnotify_marks);
      61             : }
      62             : /* run the list of all marks associated with vfsmount and destroy them */
      63             : static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
      64             : {
      65           5 :         fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
      66             : }
      67             : /* run the list of all marks associated with sb and destroy them */
      68             : static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
      69             : {
      70           5 :         fsnotify_destroy_marks(&sb->s_fsnotify_marks);
      71             : }
      72             : 
      73             : /*
      74             :  * update the dentry->d_flags of all of inode's children to indicate if inode cares
      75             :  * about events that happen to its children.
      76             :  */
      77             : extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
      78             : 
      79             : extern struct kmem_cache *fsnotify_mark_connector_cachep;
      80             : 
      81             : #endif  /* __FS_NOTIFY_FSNOTIFY_H_ */