[linux-2.6-block.git] / include / linux / fsnotify.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_FS_NOTIFY_H
#define _LINUX_FS_NOTIFY_H

/*
 * include/linux/fsnotify.h - generic hooks for filesystem notification, to
 * reduce in-source duplication from both dnotify and inotify.
 *
 * We don't compile any of this away in some complicated menagerie of ifdefs.
 * Instead, we rely on the code inside to optimize away as needed.
 *
 * (C) Copyright 2005 Robert Love
 */

#include <linux/fsnotify_backend.h>
#include <linux/audit.h>
#include <linux/slab.h>
#include <linux/bug.h>

/*
 * Notify this @dir inode about a change in a child directory entry.
 * The directory entry may have turned positive or negative or its inode may
 * have changed (i.e. renamed over).
 *
 * Unlike fsnotify_parent(), the event will be reported regardless of the
 * FS_EVENT_ON_CHILD mask on the parent inode and will not be reported if only
 * the child is interested and not the parent.
 */
static inline int fsnotify_name(__u32 mask, const void *data, int data_type,
				struct inode *dir, const struct qstr *name,
				u32 cookie)
{
	if (atomic_long_read(&dir->i_sb->s_fsnotify_connectors) == 0)
		return 0;

	return fsnotify(mask, data, data_type, dir, name, NULL, cookie);
}

static inline void fsnotify_dirent(struct inode *dir, struct dentry *dentry,
				   __u32 mask)
{
	fsnotify_name(mask, dentry, FSNOTIFY_EVENT_DENTRY, dir, &dentry->d_name, 0);
}

static inline void fsnotify_inode(struct inode *inode, __u32 mask)
{
	if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
		return;

	if (S_ISDIR(inode->i_mode))
		mask |= FS_ISDIR;

	fsnotify(mask, inode, FSNOTIFY_EVENT_INODE, NULL, NULL, inode, 0);
}

/* Notify this dentry's parent about a child's events. */
static inline int fsnotify_parent(struct dentry *dentry, __u32 mask,
				  const void *data, int data_type)
{
	struct inode *inode = d_inode(dentry);

	if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
		return 0;

	if (S_ISDIR(inode->i_mode)) {
		mask |= FS_ISDIR;

		/* sb/mount marks are not interested in name of directory */
		if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
			goto notify_child;
	}

	/* disconnected dentry cannot notify parent */
	if (IS_ROOT(dentry))
		goto notify_child;

	return __fsnotify_parent(dentry, mask, data, data_type);

notify_child:
	return fsnotify(mask, data, data_type, NULL, NULL, inode, 0);
}

/*
 * Simple wrappers to consolidate calls to fsnotify_parent() when an event
 * is on a file/dentry.
 */
static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
{
	fsnotify_parent(dentry, mask, dentry, FSNOTIFY_EVENT_DENTRY);
}

static inline int fsnotify_file(struct file *file, __u32 mask)
{
	const struct path *path;

	if (file->f_mode & FMODE_NONOTIFY)
		return 0;

	path = &file->f_path;
	return fsnotify_parent(path->dentry, mask, path, FSNOTIFY_EVENT_PATH);
}

#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
/*
 * fsnotify_file_area_perm - permission hook before access to file range
 */
static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
					  const loff_t *ppos, size_t count)
{
	__u32 fsnotify_mask = FS_ACCESS_PERM;

	/*
	 * filesystem may be modified in the context of permission events
	 * (e.g. by HSM filling a file on access), so sb freeze protection
	 * must not be held.
	 */
	lockdep_assert_once(file_write_not_started(file));

	if (!(perm_mask & MAY_READ))
		return 0;

	return fsnotify_file(file, fsnotify_mask);
}

/*
 * fsnotify_file_perm - permission hook before file access
 */
static inline int fsnotify_file_perm(struct file *file, int perm_mask)
{
	return fsnotify_file_area_perm(file, perm_mask, NULL, 0);
}

/*
 * fsnotify_open_perm - permission hook before file open
 */
static inline int fsnotify_open_perm(struct file *file)
{
	int ret;

	if (file->f_flags & __FMODE_EXEC) {
		ret = fsnotify_file(file, FS_OPEN_EXEC_PERM);
		if (ret)
			return ret;
	}

	return fsnotify_file(file, FS_OPEN_PERM);
}

#else
static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
					  const loff_t *ppos, size_t count)
{
	return 0;
}

static inline int fsnotify_file_perm(struct file *file, int perm_mask)
{
	return 0;
}

static inline int fsnotify_open_perm(struct file *file)
{
	return 0;
}
#endif

/*
 * fsnotify_link_count - inode's link count changed
 */
static inline void fsnotify_link_count(struct inode *inode)
{
	fsnotify_inode(inode, FS_ATTRIB);
}

/*
 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
 */
static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
				 const struct qstr *old_name,
				 int isdir, struct inode *target,
				 struct dentry *moved)
{
	struct inode *source = moved->d_inode;
	u32 fs_cookie = fsnotify_get_cookie();
	__u32 old_dir_mask = FS_MOVED_FROM;
	__u32 new_dir_mask = FS_MOVED_TO;
	__u32 rename_mask = FS_RENAME;
	const struct qstr *new_name = &moved->d_name;

	if (isdir) {
		old_dir_mask |= FS_ISDIR;
		new_dir_mask |= FS_ISDIR;
		rename_mask |= FS_ISDIR;
	}

	/* Event with information about both old and new parent+name */
	fsnotify_name(rename_mask, moved, FSNOTIFY_EVENT_DENTRY,
		      old_dir, old_name, 0);

	fsnotify_name(old_dir_mask, source, FSNOTIFY_EVENT_INODE,
		      old_dir, old_name, fs_cookie);
	fsnotify_name(new_dir_mask, source, FSNOTIFY_EVENT_INODE,
		      new_dir, new_name, fs_cookie);

	if (target)
		fsnotify_link_count(target);
	fsnotify_inode(source, FS_MOVE_SELF);
	audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
}

/*
 * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
 */
static inline void fsnotify_inode_delete(struct inode *inode)
{
	__fsnotify_inode_delete(inode);
}

/*
 * fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed
 */
static inline void fsnotify_vfsmount_delete(struct vfsmount *mnt)
{
	__fsnotify_vfsmount_delete(mnt);
}

/*
 * fsnotify_inoderemove - an inode is going away
 */
static inline void fsnotify_inoderemove(struct inode *inode)
{
	fsnotify_inode(inode, FS_DELETE_SELF);
	__fsnotify_inode_delete(inode);
}

/*
 * fsnotify_create - 'name' was linked in
 *
 * Caller must make sure that dentry->d_name is stable.
 * Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
 * ->d_inode later
 */
static inline void fsnotify_create(struct inode *dir, struct dentry *dentry)
{
	audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);

	fsnotify_dirent(dir, dentry, FS_CREATE);
}

/*
 * fsnotify_link - new hardlink in 'inode' directory
 *
 * Caller must make sure that new_dentry->d_name is stable.
 * Note: We have to pass also the linked inode ptr as some filesystems leave
 *   new_dentry->d_inode NULL and instantiate inode pointer later
 */
static inline void fsnotify_link(struct inode *dir, struct inode *inode,
				 struct dentry *new_dentry)
{
	fsnotify_link_count(inode);
	audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);

	fsnotify_name(FS_CREATE, inode, FSNOTIFY_EVENT_INODE,
		      dir, &new_dentry->d_name, 0);
}

/*
 * fsnotify_delete - @dentry was unlinked and unhashed
 *
 * Caller must make sure that dentry->d_name is stable.
 *
 * Note: unlike fsnotify_unlink(), we have to pass also the unlinked inode
 * as this may be called after d_delete() and old_dentry may be negative.
 */
static inline void fsnotify_delete(struct inode *dir, struct inode *inode,
				   struct dentry *dentry)
{
	__u32 mask = FS_DELETE;

	if (S_ISDIR(inode->i_mode))
		mask |= FS_ISDIR;

	fsnotify_name(mask, inode, FSNOTIFY_EVENT_INODE, dir, &dentry->d_name,
		      0);
}

/**
 * d_delete_notify - delete a dentry and call fsnotify_delete()
 * @dentry: The dentry to delete
 *
 * This helper is used to guaranty that the unlinked inode cannot be found
 * by lookup of this name after fsnotify_delete() event has been delivered.
 */
static inline void d_delete_notify(struct inode *dir, struct dentry *dentry)
{
	struct inode *inode = d_inode(dentry);

	ihold(inode);
	d_delete(dentry);
	fsnotify_delete(dir, inode, dentry);
	iput(inode);
}

/*
 * fsnotify_unlink - 'name' was unlinked
 *
 * Caller must make sure that dentry->d_name is stable.
 */
static inline void fsnotify_unlink(struct inode *dir, struct dentry *dentry)
{
	if (WARN_ON_ONCE(d_is_negative(dentry)))
		return;

	fsnotify_delete(dir, d_inode(dentry), dentry);
}

/*
 * fsnotify_mkdir - directory 'name' was created
 *
 * Caller must make sure that dentry->d_name is stable.
 * Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
 * ->d_inode later
 */
static inline void fsnotify_mkdir(struct inode *dir, struct dentry *dentry)
{
	audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);

	fsnotify_dirent(dir, dentry, FS_CREATE | FS_ISDIR);
}

/*
 * fsnotify_rmdir - directory 'name' was removed
 *
 * Caller must make sure that dentry->d_name is stable.
 */
static inline void fsnotify_rmdir(struct inode *dir, struct dentry *dentry)
{
	if (WARN_ON_ONCE(d_is_negative(dentry)))
		return;

	fsnotify_delete(dir, d_inode(dentry), dentry);
}

/*
 * fsnotify_access - file was read
 */
static inline void fsnotify_access(struct file *file)
{
	fsnotify_file(file, FS_ACCESS);
}

/*
 * fsnotify_modify - file was modified
 */
static inline void fsnotify_modify(struct file *file)
{
	fsnotify_file(file, FS_MODIFY);
}

/*
 * fsnotify_open - file was opened
 */
static inline void fsnotify_open(struct file *file)
{
	__u32 mask = FS_OPEN;

	if (file->f_flags & __FMODE_EXEC)
		mask |= FS_OPEN_EXEC;

	fsnotify_file(file, mask);
}

/*
 * fsnotify_close - file was closed
 */
static inline void fsnotify_close(struct file *file)
{
	__u32 mask = (file->f_mode & FMODE_WRITE) ? FS_CLOSE_WRITE :
						    FS_CLOSE_NOWRITE;

	fsnotify_file(file, mask);
}

/*
 * fsnotify_xattr - extended attributes were changed
 */
static inline void fsnotify_xattr(struct dentry *dentry)
{
	fsnotify_dentry(dentry, FS_ATTRIB);
}

/*
 * fsnotify_change - notify_change event.  file was modified and/or metadata
 * was changed.
 */
static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
{
	__u32 mask = 0;

	if (ia_valid & ATTR_UID)
		mask |= FS_ATTRIB;
	if (ia_valid & ATTR_GID)
		mask |= FS_ATTRIB;
	if (ia_valid & ATTR_SIZE)
		mask |= FS_MODIFY;

	/* both times implies a utime(s) call */
	if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
		mask |= FS_ATTRIB;
	else if (ia_valid & ATTR_ATIME)
		mask |= FS_ACCESS;
	else if (ia_valid & ATTR_MTIME)
		mask |= FS_MODIFY;

	if (ia_valid & ATTR_MODE)
		mask |= FS_ATTRIB;

	if (mask)
		fsnotify_dentry(dentry, mask);
}

static inline int fsnotify_sb_error(struct super_block *sb, struct inode *inode,
				    int error)
{
	struct fs_error_report report = {
		.error = error,
		.inode = inode,
		.sb = sb,
	};

	return fsnotify(FS_ERROR, &report, FSNOTIFY_EVENT_ERROR,
			NULL, NULL, NULL, 0);
}

#endif	/* _LINUX_FS_NOTIFY_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_FS_NOTIFY_H
	3	#define _LINUX_FS_NOTIFY_H
	4
	5	/*
	6	* include/linux/fsnotify.h - generic hooks for filesystem notification, to
	7	* reduce in-source duplication from both dnotify and inotify.
	8	*
	9	* We don't compile any of this away in some complicated menagerie of ifdefs.
	10	* Instead, we rely on the code inside to optimize away as needed.
	11	*
	12	* (C) Copyright 2005 Robert Love
	13	*/
	14
	15	#include <linux/fsnotify_backend.h>
	16	#include <linux/audit.h>
	17	#include <linux/slab.h>
	18	#include <linux/bug.h>
	19
	20	/*
	21	* Notify this @dir inode about a change in a child directory entry.
	22	* The directory entry may have turned positive or negative or its inode may
	23	* have changed (i.e. renamed over).
	24	*
	25	* Unlike fsnotify_parent(), the event will be reported regardless of the
	26	* FS_EVENT_ON_CHILD mask on the parent inode and will not be reported if only
	27	* the child is interested and not the parent.
	28	*/
	29	static inline int fsnotify_name(__u32 mask, const void *data, int data_type,
	30	struct inode dir, const struct qstr name,
	31	u32 cookie)
	32	{
	33	if (atomic_long_read(&dir->i_sb->s_fsnotify_connectors) == 0)
	34	return 0;
	35
	36	return fsnotify(mask, data, data_type, dir, name, NULL, cookie);
	37	}
	38
	39	static inline void fsnotify_dirent(struct inode dir, struct dentry dentry,
	40	__u32 mask)
	41	{
	42	fsnotify_name(mask, dentry, FSNOTIFY_EVENT_DENTRY, dir, &dentry->d_name, 0);
	43	}
	44
	45	static inline void fsnotify_inode(struct inode *inode, __u32 mask)
	46	{
	47	if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
	48	return;
	49
	50	if (S_ISDIR(inode->i_mode))
	51	mask \|= FS_ISDIR;
	52
	53	fsnotify(mask, inode, FSNOTIFY_EVENT_INODE, NULL, NULL, inode, 0);
	54	}
	55
	56	/* Notify this dentry's parent about a child's events. */
	57	static inline int fsnotify_parent(struct dentry *dentry, __u32 mask,
	58	const void *data, int data_type)
	59	{
	60	struct inode *inode = d_inode(dentry);
	61
	62	if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
	63	return 0;
	64
	65	if (S_ISDIR(inode->i_mode)) {
	66	mask \|= FS_ISDIR;
	67
	68	/* sb/mount marks are not interested in name of directory */
	69	if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
	70	goto notify_child;
	71	}
	72
	73	/* disconnected dentry cannot notify parent */
	74	if (IS_ROOT(dentry))
	75	goto notify_child;
	76
	77	return __fsnotify_parent(dentry, mask, data, data_type);
	78
	79	notify_child:
	80	return fsnotify(mask, data, data_type, NULL, NULL, inode, 0);
	81	}
	82
	83	/*
	84	* Simple wrappers to consolidate calls to fsnotify_parent() when an event
	85	* is on a file/dentry.
	86	*/
	87	static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
	88	{
	89	fsnotify_parent(dentry, mask, dentry, FSNOTIFY_EVENT_DENTRY);
	90	}
	91
	92	static inline int fsnotify_file(struct file *file, __u32 mask)
	93	{
	94	const struct path *path;
	95
	96	if (file->f_mode & FMODE_NONOTIFY)
	97	return 0;
	98
	99	path = &file->f_path;
	100	return fsnotify_parent(path->dentry, mask, path, FSNOTIFY_EVENT_PATH);
	101	}
	102
	103	#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
	104	/*
	105	* fsnotify_file_area_perm - permission hook before access to file range
	106	*/
	107	static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
	108	const loff_t *ppos, size_t count)
	109	{
	110	__u32 fsnotify_mask = FS_ACCESS_PERM;
	111
	112	/*
	113	* filesystem may be modified in the context of permission events
	114	* (e.g. by HSM filling a file on access), so sb freeze protection
	115	* must not be held.
	116	*/
	117	lockdep_assert_once(file_write_not_started(file));
	118
	119	if (!(perm_mask & MAY_READ))
	120	return 0;
	121
	122	return fsnotify_file(file, fsnotify_mask);
	123	}
	124
	125	/*
	126	* fsnotify_file_perm - permission hook before file access
	127	*/
	128	static inline int fsnotify_file_perm(struct file *file, int perm_mask)
	129	{
	130	return fsnotify_file_area_perm(file, perm_mask, NULL, 0);
	131	}
	132
	133	/*
	134	* fsnotify_open_perm - permission hook before file open
	135	*/
	136	static inline int fsnotify_open_perm(struct file *file)
	137	{
	138	int ret;
	139
	140	if (file->f_flags & __FMODE_EXEC) {
	141	ret = fsnotify_file(file, FS_OPEN_EXEC_PERM);
	142	if (ret)
	143	return ret;
	144	}
	145
	146	return fsnotify_file(file, FS_OPEN_PERM);
	147	}
	148
	149	#else
	150	static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
	151	const loff_t *ppos, size_t count)
	152	{
	153	return 0;
	154	}
	155
	156	static inline int fsnotify_file_perm(struct file *file, int perm_mask)
	157	{
	158	return 0;
	159	}
	160
	161	static inline int fsnotify_open_perm(struct file *file)
	162	{
	163	return 0;
	164	}
	165	#endif
	166
	167	/*
	168	* fsnotify_link_count - inode's link count changed
	169	*/
	170	static inline void fsnotify_link_count(struct inode *inode)
	171	{
	172	fsnotify_inode(inode, FS_ATTRIB);
	173	}
	174
	175	/*
	176	* fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
	177	*/
	178	static inline void fsnotify_move(struct inode old_dir, struct inode new_dir,
	179	const struct qstr *old_name,
	180	int isdir, struct inode *target,
	181	struct dentry *moved)
	182	{
	183	struct inode *source = moved->d_inode;
	184	u32 fs_cookie = fsnotify_get_cookie();
	185	__u32 old_dir_mask = FS_MOVED_FROM;
	186	__u32 new_dir_mask = FS_MOVED_TO;
	187	__u32 rename_mask = FS_RENAME;
	188	const struct qstr *new_name = &moved->d_name;
	189
	190	if (isdir) {
	191	old_dir_mask \|= FS_ISDIR;
	192	new_dir_mask \|= FS_ISDIR;
	193	rename_mask \|= FS_ISDIR;
	194	}
	195
	196	/* Event with information about both old and new parent+name */
	197	fsnotify_name(rename_mask, moved, FSNOTIFY_EVENT_DENTRY,
	198	old_dir, old_name, 0);
	199
	200	fsnotify_name(old_dir_mask, source, FSNOTIFY_EVENT_INODE,
	201	old_dir, old_name, fs_cookie);
	202	fsnotify_name(new_dir_mask, source, FSNOTIFY_EVENT_INODE,
	203	new_dir, new_name, fs_cookie);
	204
	205	if (target)
	206	fsnotify_link_count(target);
	207	fsnotify_inode(source, FS_MOVE_SELF);
	208	audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
	209	}
	210
	211	/*
	212	* fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
	213	*/
	214	static inline void fsnotify_inode_delete(struct inode *inode)
	215	{
	216	__fsnotify_inode_delete(inode);
	217	}
	218
	219	/*
	220	* fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed
	221	*/
	222	static inline void fsnotify_vfsmount_delete(struct vfsmount *mnt)
	223	{
	224	__fsnotify_vfsmount_delete(mnt);
	225	}
	226
	227	/*
	228	* fsnotify_inoderemove - an inode is going away
	229	*/
	230	static inline void fsnotify_inoderemove(struct inode *inode)
	231	{
	232	fsnotify_inode(inode, FS_DELETE_SELF);
	233	__fsnotify_inode_delete(inode);
	234	}
	235
	236	/*
	237	* fsnotify_create - 'name' was linked in
	238	*
	239	* Caller must make sure that dentry->d_name is stable.
	240	* Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
	241	* ->d_inode later
	242	*/
	243	static inline void fsnotify_create(struct inode dir, struct dentry dentry)
	244	{
	245	audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);
	246
	247	fsnotify_dirent(dir, dentry, FS_CREATE);
	248	}
	249
	250	/*
	251	* fsnotify_link - new hardlink in 'inode' directory
	252	*
	253	* Caller must make sure that new_dentry->d_name is stable.
	254	* Note: We have to pass also the linked inode ptr as some filesystems leave
	255	* new_dentry->d_inode NULL and instantiate inode pointer later
	256	*/
	257	static inline void fsnotify_link(struct inode dir, struct inode inode,
	258	struct dentry *new_dentry)
	259	{
	260	fsnotify_link_count(inode);
	261	audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
	262
	263	fsnotify_name(FS_CREATE, inode, FSNOTIFY_EVENT_INODE,
	264	dir, &new_dentry->d_name, 0);
	265	}
	266
	267	/*
	268	* fsnotify_delete - @dentry was unlinked and unhashed
	269	*
	270	* Caller must make sure that dentry->d_name is stable.
	271	*
	272	* Note: unlike fsnotify_unlink(), we have to pass also the unlinked inode
	273	* as this may be called after d_delete() and old_dentry may be negative.
	274	*/
	275	static inline void fsnotify_delete(struct inode dir, struct inode inode,
	276	struct dentry *dentry)
	277	{
	278	__u32 mask = FS_DELETE;
	279
	280	if (S_ISDIR(inode->i_mode))
	281	mask \|= FS_ISDIR;
	282
	283	fsnotify_name(mask, inode, FSNOTIFY_EVENT_INODE, dir, &dentry->d_name,
	284	0);
	285	}
	286
	287	/**
	288	* d_delete_notify - delete a dentry and call fsnotify_delete()
	289	* @dentry: The dentry to delete
	290	*
	291	* This helper is used to guaranty that the unlinked inode cannot be found
	292	* by lookup of this name after fsnotify_delete() event has been delivered.
	293	*/
	294	static inline void d_delete_notify(struct inode dir, struct dentry dentry)
	295	{
	296	struct inode *inode = d_inode(dentry);
	297
	298	ihold(inode);
	299	d_delete(dentry);
	300	fsnotify_delete(dir, inode, dentry);
	301	iput(inode);
	302	}
	303
	304	/*
	305	* fsnotify_unlink - 'name' was unlinked
	306	*
	307	* Caller must make sure that dentry->d_name is stable.
	308	*/
	309	static inline void fsnotify_unlink(struct inode dir, struct dentry dentry)
	310	{
	311	if (WARN_ON_ONCE(d_is_negative(dentry)))
	312	return;
	313
	314	fsnotify_delete(dir, d_inode(dentry), dentry);
	315	}
	316
	317	/*
	318	* fsnotify_mkdir - directory 'name' was created
	319	*
	320	* Caller must make sure that dentry->d_name is stable.
	321	* Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
	322	* ->d_inode later
	323	*/
	324	static inline void fsnotify_mkdir(struct inode dir, struct dentry dentry)
	325	{
	326	audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);
	327
	328	fsnotify_dirent(dir, dentry, FS_CREATE \| FS_ISDIR);
	329	}
	330
	331	/*
	332	* fsnotify_rmdir - directory 'name' was removed
	333	*
	334	* Caller must make sure that dentry->d_name is stable.
	335	*/
	336	static inline void fsnotify_rmdir(struct inode dir, struct dentry dentry)
	337	{
	338	if (WARN_ON_ONCE(d_is_negative(dentry)))
	339	return;
	340
	341	fsnotify_delete(dir, d_inode(dentry), dentry);
	342	}
	343
	344	/*
	345	* fsnotify_access - file was read
	346	*/
	347	static inline void fsnotify_access(struct file *file)
	348	{
	349	fsnotify_file(file, FS_ACCESS);
	350	}
	351
	352	/*
	353	* fsnotify_modify - file was modified
	354	*/
	355	static inline void fsnotify_modify(struct file *file)
	356	{
	357	fsnotify_file(file, FS_MODIFY);
	358	}
	359
	360	/*
	361	* fsnotify_open - file was opened
	362	*/
	363	static inline void fsnotify_open(struct file *file)
	364	{
	365	__u32 mask = FS_OPEN;
	366
	367	if (file->f_flags & __FMODE_EXEC)
	368	mask \|= FS_OPEN_EXEC;
	369
	370	fsnotify_file(file, mask);
	371	}
	372
	373	/*
	374	* fsnotify_close - file was closed
	375	*/
	376	static inline void fsnotify_close(struct file *file)
	377	{
	378	__u32 mask = (file->f_mode & FMODE_WRITE) ? FS_CLOSE_WRITE :
	379	FS_CLOSE_NOWRITE;
	380
	381	fsnotify_file(file, mask);
	382	}
	383
	384	/*
	385	* fsnotify_xattr - extended attributes were changed
	386	*/
	387	static inline void fsnotify_xattr(struct dentry *dentry)
	388	{
	389	fsnotify_dentry(dentry, FS_ATTRIB);
	390	}
	391
	392	/*
	393	* fsnotify_change - notify_change event. file was modified and/or metadata
	394	* was changed.
	395	*/
	396	static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
	397	{
	398	__u32 mask = 0;
	399
	400	if (ia_valid & ATTR_UID)
	401	mask \|= FS_ATTRIB;
	402	if (ia_valid & ATTR_GID)
	403	mask \|= FS_ATTRIB;
	404	if (ia_valid & ATTR_SIZE)
	405	mask \|= FS_MODIFY;
	406
	407	/* both times implies a utime(s) call */
	408	if ((ia_valid & (ATTR_ATIME \| ATTR_MTIME)) == (ATTR_ATIME \| ATTR_MTIME))
	409	mask \|= FS_ATTRIB;
	410	else if (ia_valid & ATTR_ATIME)
	411	mask \|= FS_ACCESS;
	412	else if (ia_valid & ATTR_MTIME)
	413	mask \|= FS_MODIFY;
	414
	415	if (ia_valid & ATTR_MODE)
	416	mask \|= FS_ATTRIB;
	417
	418	if (mask)
	419	fsnotify_dentry(dentry, mask);
	420	}
	421
	422	static inline int fsnotify_sb_error(struct super_block sb, struct inode inode,
	423	int error)
	424	{
	425	struct fs_error_report report = {
	426	.error = error,
	427	.inode = inode,
	428	.sb = sb,
	429	};
	430
	431	return fsnotify(FS_ERROR, &report, FSNOTIFY_EVENT_ERROR,
	432	NULL, NULL, NULL, 0);
	433	}
	434
	435	#endif /* _LINUX_FS_NOTIFY_H */