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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __FS_NOTIFY_FSNOTIFY_H_
#define __FS_NOTIFY_FSNOTIFY_H_
#include <linux/list.h>
#include <linux/fsnotify.h>
#include <linux/srcu.h>
#include <linux/types.h>
#include "../mount.h"
static inline struct inode *fsnotify_conn_inode(
struct fsnotify_mark_connector *conn)
{
return container_of(conn->obj, struct inode, i_fsnotify_marks);
}
static inline struct mount *fsnotify_conn_mount(
struct fsnotify_mark_connector *conn)
{
return container_of(conn->obj, struct mount, mnt_fsnotify_marks);
}
static inline struct super_block *fsnotify_conn_sb(
struct fsnotify_mark_connector *conn)
{
return container_of(conn->obj, struct super_block, s_fsnotify_marks);
}
static inline struct super_block *fsnotify_connector_sb(
struct fsnotify_mark_connector *conn)
{
switch (conn->type) {
case FSNOTIFY_OBJ_TYPE_INODE:
return fsnotify_conn_inode(conn)->i_sb;
case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
return fsnotify_conn_mount(conn)->mnt.mnt_sb;
case FSNOTIFY_OBJ_TYPE_SB:
return fsnotify_conn_sb(conn);
default:
return NULL;
}
}
/* destroy all events sitting in this groups notification queue */
extern void fsnotify_flush_notify(struct fsnotify_group *group);
/* protects reads of inode and vfsmount marks list */
extern struct srcu_struct fsnotify_mark_srcu;
/* compare two groups for sorting of marks lists */
extern int fsnotify_compare_groups(struct fsnotify_group *a,
struct fsnotify_group *b);
/* Destroy all marks attached to an object via connector */
extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
/* run the list of all marks associated with inode and destroy them */
static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
{
fsnotify_destroy_marks(&inode->i_fsnotify_marks);
}
/* run the list of all marks associated with vfsmount and destroy them */
static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
{
fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
}
/* run the list of all marks associated with sb and destroy them */
static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
{
fsnotify_destroy_marks(&sb->s_fsnotify_marks);
}
/*
* update the dentry->d_flags of all of inode's children to indicate if inode cares
* about events that happen to its children.
*/
extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
/* allocate and destroy and event holder to attach events to notification/access queues */
extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
extern struct kmem_cache *fsnotify_mark_connector_cachep;
#endif /* __FS_NOTIFY_FSNOTIFY_H_ */
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