1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __FS_NOTIFY_FSNOTIFY_H_
3 #define __FS_NOTIFY_FSNOTIFY_H_
5 #include <linux/list.h>
6 #include <linux/fsnotify.h>
7 #include <linux/srcu.h>
8 #include <linux/types.h>
13 * fsnotify_connp_t is what we embed in objects which connector can be attached
16 typedef struct fsnotify_mark_connector __rcu *fsnotify_connp_t;
18 static inline struct inode *fsnotify_conn_inode(
19 struct fsnotify_mark_connector *conn)
24 static inline struct mount *fsnotify_conn_mount(
25 struct fsnotify_mark_connector *conn)
27 return real_mount(conn->obj);
30 static inline struct super_block *fsnotify_conn_sb(
31 struct fsnotify_mark_connector *conn)
36 static inline struct mnt_namespace *fsnotify_conn_mntns(
37 struct fsnotify_mark_connector *conn)
42 static inline struct super_block *fsnotify_object_sb(void *obj,
43 enum fsnotify_obj_type obj_type)
46 case FSNOTIFY_OBJ_TYPE_INODE:
47 return ((struct inode *)obj)->i_sb;
48 case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
49 return ((struct vfsmount *)obj)->mnt_sb;
50 case FSNOTIFY_OBJ_TYPE_SB:
51 return (struct super_block *)obj;
57 static inline struct super_block *fsnotify_connector_sb(
58 struct fsnotify_mark_connector *conn)
60 return fsnotify_object_sb(conn->obj, conn->type);
63 static inline fsnotify_connp_t *fsnotify_sb_marks(struct super_block *sb)
65 struct fsnotify_sb_info *sbinfo = fsnotify_sb_info(sb);
67 return sbinfo ? &sbinfo->sb_marks : NULL;
70 /* destroy all events sitting in this groups notification queue */
71 extern void fsnotify_flush_notify(struct fsnotify_group *group);
73 /* protects reads of inode and vfsmount marks list */
74 extern struct srcu_struct fsnotify_mark_srcu;
76 /* compare two groups for sorting of marks lists */
77 extern int fsnotify_compare_groups(struct fsnotify_group *a,
78 struct fsnotify_group *b);
80 /* Destroy all marks attached to an object via connector */
81 extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
82 /* run the list of all marks associated with inode and destroy them */
83 static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
85 fsnotify_destroy_marks(&inode->i_fsnotify_marks);
87 /* run the list of all marks associated with vfsmount and destroy them */
88 static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
90 fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
92 /* run the list of all marks associated with sb and destroy them */
93 static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
95 fsnotify_destroy_marks(fsnotify_sb_marks(sb));
98 static inline void fsnotify_clear_marks_by_mntns(struct mnt_namespace *mntns)
100 fsnotify_destroy_marks(&mntns->n_fsnotify_marks);
104 * update the dentry->d_flags of all of inode's children to indicate if inode cares
105 * about events that happen to its children.
107 extern void fsnotify_set_children_dentry_flags(struct inode *inode);
109 extern struct kmem_cache *fsnotify_mark_connector_cachep;
111 #endif /* __FS_NOTIFY_FSNOTIFY_H_ */