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 static inline struct super_block *fsnotify_connector_sb( 31 struct fsnotify_mark_connector *conn) 32 { 33 switch (conn->type) { 34 case FSNOTIFY_OBJ_TYPE_INODE: 35 return fsnotify_conn_inode(conn)->i_sb; 36 case FSNOTIFY_OBJ_TYPE_VFSMOUNT: 37 return fsnotify_conn_mount(conn)->mnt.mnt_sb; 38 case FSNOTIFY_OBJ_TYPE_SB: 39 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 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 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 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 /* allocate and destroy and event holder to attach events to notification/access queues */ 80 extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void); 81 extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder); 82 83 extern struct kmem_cache *fsnotify_mark_connector_cachep; 84 85 #endif /* __FS_NOTIFY_FSNOTIFY_H_ */ 86