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

#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
 */

#ifdef __KERNEL__

#include <linux/dnotify.h>
#include <linux/inotify.h>
#include <linux/audit.h>

/*
 * fsnotify_d_instantiate - instantiate a dentry for inode
 * Called with dcache_lock held.
 */
static inline void fsnotify_d_instantiate(struct dentry *entry,
						struct inode *inode)
{
	inotify_d_instantiate(entry, inode);
}

/*
 * fsnotify_d_move - entry has been moved
 * Called with dcache_lock and entry->d_lock held.
 */
static inline void fsnotify_d_move(struct dentry *entry)
{
	inotify_d_move(entry);
}

/*
 * 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 char *old_name, const char *new_name,
				 int isdir, struct inode *target, struct inode *source)
{
	u32 cookie = inotify_get_cookie();

	if (old_dir == new_dir)
		inode_dir_notify(old_dir, DN_RENAME);
	else {
		inode_dir_notify(old_dir, DN_DELETE);
		inode_dir_notify(new_dir, DN_CREATE);
	}

	if (isdir)
		isdir = IN_ISDIR;
	inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name,
				  source);
	inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name,
				  source);

	if (target) {
		inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
		inotify_inode_is_dead(target);
	}

	if (source) {
		inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
	}
	audit_inode_child(new_name, source, new_dir);
}

/*
 * fsnotify_nameremove - a filename was removed from a directory
 */
static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
{
	if (isdir)
		isdir = IN_ISDIR;
	dnotify_parent(dentry, DN_DELETE);
	inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name);
}

/*
 * fsnotify_inoderemove - an inode is going away
 */
static inline void fsnotify_inoderemove(struct inode *inode)
{
	inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
	inotify_inode_is_dead(inode);
}

/*
 * fsnotify_create - 'name' was linked in
 */
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
	inode_dir_notify(inode, DN_CREATE);
	inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
				  dentry->d_inode);
	audit_inode_child(dentry->d_name.name, dentry->d_inode, inode);
}

/*
 * fsnotify_mkdir - directory 'name' was created
 */
static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
{
	inode_dir_notify(inode, DN_CREATE);
	inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, 
				  dentry->d_name.name, dentry->d_inode);
	audit_inode_child(dentry->d_name.name, dentry->d_inode, inode);
}

/*
 * fsnotify_access - file was read
 */
static inline void fsnotify_access(struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	u32 mask = IN_ACCESS;

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

	dnotify_parent(dentry, DN_ACCESS);
	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
}

/*
 * fsnotify_modify - file was modified
 */
static inline void fsnotify_modify(struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	u32 mask = IN_MODIFY;

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

	dnotify_parent(dentry, DN_MODIFY);
	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
}

/*
 * fsnotify_open - file was opened
 */
static inline void fsnotify_open(struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	u32 mask = IN_OPEN;

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

	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
}

/*
 * fsnotify_close - file was closed
 */
static inline void fsnotify_close(struct file *file)
{
	struct dentry *dentry = file->f_path.dentry;
	struct inode *inode = dentry->d_inode;
	const char *name = dentry->d_name.name;
	mode_t mode = file->f_mode;
	u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;

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

	inotify_dentry_parent_queue_event(dentry, mask, 0, name);
	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
}

/*
 * fsnotify_xattr - extended attributes were changed
 */
static inline void fsnotify_xattr(struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	u32 mask = IN_ATTRIB;

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

	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
}

/*
 * 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)
{
	struct inode *inode = dentry->d_inode;
	int dn_mask = 0;
	u32 in_mask = 0;

	if (ia_valid & ATTR_UID) {
		in_mask |= IN_ATTRIB;
		dn_mask |= DN_ATTRIB;
	}
	if (ia_valid & ATTR_GID) {
		in_mask |= IN_ATTRIB;
		dn_mask |= DN_ATTRIB;
	}
	if (ia_valid & ATTR_SIZE) {
		in_mask |= IN_MODIFY;
		dn_mask |= DN_MODIFY;
	}
	/* both times implies a utime(s) call */
	if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
	{
		in_mask |= IN_ATTRIB;
		dn_mask |= DN_ATTRIB;
	} else if (ia_valid & ATTR_ATIME) {
		in_mask |= IN_ACCESS;
		dn_mask |= DN_ACCESS;
	} else if (ia_valid & ATTR_MTIME) {
		in_mask |= IN_MODIFY;
		dn_mask |= DN_MODIFY;
	}
	if (ia_valid & ATTR_MODE) {
		in_mask |= IN_ATTRIB;
		dn_mask |= DN_ATTRIB;
	}

	if (dn_mask)
		dnotify_parent(dentry, dn_mask);
	if (in_mask) {
		if (S_ISDIR(inode->i_mode))
			in_mask |= IN_ISDIR;
		inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
		inotify_dentry_parent_queue_event(dentry, in_mask, 0,
						  dentry->d_name.name);
	}
}

#ifdef CONFIG_INOTIFY	/* inotify helpers */

/*
 * fsnotify_oldname_init - save off the old filename before we change it
 */
static inline const char *fsnotify_oldname_init(const char *name)
{
	return kstrdup(name, GFP_KERNEL);
}

/*
 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
 */
static inline void fsnotify_oldname_free(const char *old_name)
{
	kfree(old_name);
}

#else	/* CONFIG_INOTIFY */

static inline const char *fsnotify_oldname_init(const char *name)
{
	return NULL;
}

static inline void fsnotify_oldname_free(const char *old_name)
{
}

#endif	/* ! CONFIG_INOTIFY */

#endif	/* __KERNEL__ */

#endif	/* _LINUX_FS_NOTIFY_H */
Commit	Line	Data
0eeca283 RL	1	#ifndef _LINUX_FS_NOTIFY_H
	2	#define _LINUX_FS_NOTIFY_H
	3
	4	/*
	5	* include/linux/fsnotify.h - generic hooks for filesystem notification, to
	6	* reduce in-source duplication from both dnotify and inotify.
	7	*
	8	* We don't compile any of this away in some complicated menagerie of ifdefs.
	9	* Instead, we rely on the code inside to optimize away as needed.
	10	*
	11	* (C) Copyright 2005 Robert Love
	12	*/
	13
	14	#ifdef __KERNEL__
	15
	16	#include <linux/dnotify.h>
	17	#include <linux/inotify.h>
73241ccc	18	#include <linux/audit.h>
0eeca283	19
c32ccd87 NP	20	/*
	21	* fsnotify_d_instantiate - instantiate a dentry for inode
	22	* Called with dcache_lock held.
	23	*/
	24	static inline void fsnotify_d_instantiate(struct dentry *entry,
	25	struct inode *inode)
	26	{
	27	inotify_d_instantiate(entry, inode);
	28	}
	29
	30	/*
	31	* fsnotify_d_move - entry has been moved
	32	* Called with dcache_lock and entry->d_lock held.
	33	*/
	34	static inline void fsnotify_d_move(struct dentry *entry)
	35	{
	36	inotify_d_move(entry);
	37	}
	38
0eeca283 RL	39	/*
	40	* fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
	41	*/
	42	static inline void fsnotify_move(struct inode old_dir, struct inode new_dir,
	43	const char old_name, const char new_name,
89204c40	44	int isdir, struct inode target, struct inode source)
0eeca283 RL	45	{
	46	u32 cookie = inotify_get_cookie();
	47
	48	if (old_dir == new_dir)
	49	inode_dir_notify(old_dir, DN_RENAME);
	50	else {
	51	inode_dir_notify(old_dir, DN_DELETE);
	52	inode_dir_notify(new_dir, DN_CREATE);
	53	}
	54
	55	if (isdir)
	56	isdir = IN_ISDIR;
7c297722 AG	57	inotify_inode_queue_event(old_dir, IN_MOVED_FROM\|isdir,cookie,old_name,
	58	source);
	59	inotify_inode_queue_event(new_dir, IN_MOVED_TO\|isdir, cookie, new_name,
	60	source);
75449536 JM	61
75449536 JM	62	if (target) {
7c297722	63	inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
75449536 JM	64	inotify_inode_is_dead(target);
75449536 JM	65	}
89204c40 JM	66
89204c40 JM	67	if (source) {
7c297722	68	inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
89204c40	69	}
73d3ec5a	70	audit_inode_child(new_name, source, new_dir);
0eeca283 RL	71	}
0eeca283 RL	72
7a91bf7f JM	73	/*
	74	* fsnotify_nameremove - a filename was removed from a directory
	75	*/
	76	static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
	77	{
	78	if (isdir)
	79	isdir = IN_ISDIR;
	80	dnotify_parent(dentry, DN_DELETE);
	81	inotify_dentry_parent_queue_event(dentry, IN_DELETE\|isdir, 0, dentry->d_name.name);
	82	}
	83
	84	/*
	85	* fsnotify_inoderemove - an inode is going away
	86	*/
	87	static inline void fsnotify_inoderemove(struct inode *inode)
	88	{
7c297722	89	inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
7a91bf7f JM	90	inotify_inode_is_dead(inode);
	91	}
	92
0eeca283 RL	93	/*
	94	* fsnotify_create - 'name' was linked in
	95	*/
f38aa942	96	static inline void fsnotify_create(struct inode inode, struct dentry dentry)
0eeca283 RL	97	{
0eeca283 RL	98	inode_dir_notify(inode, DN_CREATE);
7c297722 AG	99	inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
7c297722 AG	100	dentry->d_inode);
73d3ec5a	101	audit_inode_child(dentry->d_name.name, dentry->d_inode, inode);
0eeca283 RL	102	}
	103
	104	/*
	105	* fsnotify_mkdir - directory 'name' was created
	106	*/
f38aa942	107	static inline void fsnotify_mkdir(struct inode inode, struct dentry dentry)
0eeca283 RL	108	{
0eeca283 RL	109	inode_dir_notify(inode, DN_CREATE);
f38aa942	110	inotify_inode_queue_event(inode, IN_CREATE \| IN_ISDIR, 0,
7c297722	111	dentry->d_name.name, dentry->d_inode);
73d3ec5a	112	audit_inode_child(dentry->d_name.name, dentry->d_inode, inode);
0eeca283 RL	113	}
	114
	115	/*
	116	* fsnotify_access - file was read
	117	*/
	118	static inline void fsnotify_access(struct dentry *dentry)
	119	{
	120	struct inode *inode = dentry->d_inode;
	121	u32 mask = IN_ACCESS;
	122
	123	if (S_ISDIR(inode->i_mode))
	124	mask \|= IN_ISDIR;
	125
	126	dnotify_parent(dentry, DN_ACCESS);
	127	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	128	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	129	}
	130
	131	/*
	132	* fsnotify_modify - file was modified
	133	*/
	134	static inline void fsnotify_modify(struct dentry *dentry)
	135	{
	136	struct inode *inode = dentry->d_inode;
	137	u32 mask = IN_MODIFY;
	138
	139	if (S_ISDIR(inode->i_mode))
	140	mask \|= IN_ISDIR;
	141
	142	dnotify_parent(dentry, DN_MODIFY);
	143	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	144	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	145	}
	146
	147	/*
	148	* fsnotify_open - file was opened
	149	*/
	150	static inline void fsnotify_open(struct dentry *dentry)
	151	{
	152	struct inode *inode = dentry->d_inode;
	153	u32 mask = IN_OPEN;
	154
	155	if (S_ISDIR(inode->i_mode))
	156	mask \|= IN_ISDIR;
	157
0eeca283	158	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	159	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	160	}
	161
	162	/*
	163	* fsnotify_close - file was closed
	164	*/
	165	static inline void fsnotify_close(struct file *file)
	166	{
0f7fc9e4	167	struct dentry *dentry = file->f_path.dentry;
0eeca283 RL	168	struct inode *inode = dentry->d_inode;
	169	const char *name = dentry->d_name.name;
	170	mode_t mode = file->f_mode;
	171	u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
	172
	173	if (S_ISDIR(inode->i_mode))
	174	mask \|= IN_ISDIR;
	175
	176	inotify_dentry_parent_queue_event(dentry, mask, 0, name);
7c297722	177	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	178	}
	179
	180	/*
	181	* fsnotify_xattr - extended attributes were changed
	182	*/
	183	static inline void fsnotify_xattr(struct dentry *dentry)
	184	{
	185	struct inode *inode = dentry->d_inode;
	186	u32 mask = IN_ATTRIB;
	187
	188	if (S_ISDIR(inode->i_mode))
	189	mask \|= IN_ISDIR;
	190
	191	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	192	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	193	}
	194
	195	/*
	196	* fsnotify_change - notify_change event. file was modified and/or metadata
	197	* was changed.
	198	*/
	199	static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
	200	{
	201	struct inode *inode = dentry->d_inode;
	202	int dn_mask = 0;
	203	u32 in_mask = 0;
	204
	205	if (ia_valid & ATTR_UID) {
	206	in_mask \|= IN_ATTRIB;
	207	dn_mask \|= DN_ATTRIB;
	208	}
	209	if (ia_valid & ATTR_GID) {
	210	in_mask \|= IN_ATTRIB;
	211	dn_mask \|= DN_ATTRIB;
	212	}
	213	if (ia_valid & ATTR_SIZE) {
	214	in_mask \|= IN_MODIFY;
	215	dn_mask \|= DN_MODIFY;
	216	}
	217	/* both times implies a utime(s) call */
	218	if ((ia_valid & (ATTR_ATIME \| ATTR_MTIME)) == (ATTR_ATIME \| ATTR_MTIME))
	219	{
	220	in_mask \|= IN_ATTRIB;
	221	dn_mask \|= DN_ATTRIB;
	222	} else if (ia_valid & ATTR_ATIME) {
	223	in_mask \|= IN_ACCESS;
	224	dn_mask \|= DN_ACCESS;
	225	} else if (ia_valid & ATTR_MTIME) {
	226	in_mask \|= IN_MODIFY;
	227	dn_mask \|= DN_MODIFY;
	228	}
	229	if (ia_valid & ATTR_MODE) {
	230	in_mask \|= IN_ATTRIB;
	231	dn_mask \|= DN_ATTRIB;
	232	}
	233
	234	if (dn_mask)
	235	dnotify_parent(dentry, dn_mask);
	236	if (in_mask) {
	237	if (S_ISDIR(inode->i_mode))
	238	in_mask \|= IN_ISDIR;
7c297722	239	inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
0eeca283 RL	240	inotify_dentry_parent_queue_event(dentry, in_mask, 0,
	241	dentry->d_name.name);
	242	}
	243	}
	244
	245	#ifdef CONFIG_INOTIFY /* inotify helpers */
	246
	247	/*
	248	* fsnotify_oldname_init - save off the old filename before we change it
	249	*/
	250	static inline const char fsnotify_oldname_init(const char name)
	251	{
	252	return kstrdup(name, GFP_KERNEL);
	253	}
	254
	255	/*
	256	* fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
	257	*/
	258	static inline void fsnotify_oldname_free(const char *old_name)
	259	{
	260	kfree(old_name);
	261	}
	262
	263	#else /* CONFIG_INOTIFY */
	264
	265	static inline const char fsnotify_oldname_init(const char name)
	266	{
	267	return NULL;
	268	}
	269
	270	static inline void fsnotify_oldname_free(const char *old_name)
	271	{
	272	}
	273
	274	#endif /* ! CONFIG_INOTIFY */
	275
	276	#endif /* __KERNEL__ */
	277
	278	#endif /* _LINUX_FS_NOTIFY_H */