linux/fs/notify/inotify/inotify_fsnotify.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * fs/inotify_user.c - inotify support for userspace
 *
 * Authors:
 *	John McCutchan	<[email protected]>
 *	Robert Love	<[email protected]>
 *
 * Copyright (C) 2005 John McCutchan
 * Copyright 2006 Hewlett-Packard Development Company, L.P.
 *
 * Copyright (C) 2009 Eric Paris <Red Hat Inc>
 * inotify was largely rewriten to make use of the fsnotify infrastructure
 */

#include <linux/dcache.h> /* d_unlinked */
#include <linux/fs.h> /* struct inode */
#include <linux/fsnotify_backend.h>
#include <linux/inotify.h>
#include <linux/path.h> /* struct path */
#include <linux/slab.h> /* kmem_* */
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/sched/user.h>
#include <linux/sched/mm.h>

#include "inotify.h"

/*
 * Check if 2 events contain the same information.
 */
static bool event_compare(struct fsnotify_event *old_fsn,
			  struct fsnotify_event *new_fsn)
{ … }

static int inotify_merge(struct fsnotify_group *group,
			 struct fsnotify_event *event)
{ … }

int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, u32 mask,
			       struct inode *inode, struct inode *dir,
			       const struct qstr *name, u32 cookie)
{ … }

static void inotify_freeing_mark(struct fsnotify_mark *fsn_mark, struct fsnotify_group *group)
{ … }

/*
 * This is NEVER supposed to be called.  Inotify marks should either have been
 * removed from the idr when the watch was removed or in the
 * fsnotify_destroy_mark_by_group() call when the inotify instance was being
 * torn down.  This is only called if the idr is about to be freed but there
 * are still marks in it.
 */
static int idr_callback(int id, void *p, void *data)
{ … }

static void inotify_free_group_priv(struct fsnotify_group *group)
{ … }

static void inotify_free_event(struct fsnotify_group *group,
			       struct fsnotify_event *fsn_event)
{ … }

/* ding dong the mark is dead */
static void inotify_free_mark(struct fsnotify_mark *fsn_mark)
{ … }

const struct fsnotify_ops inotify_fsnotify_ops = …;