[deliverable/linux.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>

/*
 * 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);
	inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name);

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

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

/*
 * 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);
	inotify_inode_is_dead(inode);
}

/*
 * fsnotify_create - 'name' was linked in
 */
static inline void fsnotify_create(struct inode *inode, const char *name)
{
	inode_dir_notify(inode, DN_CREATE);
	inotify_inode_queue_event(inode, IN_CREATE, 0, name);
}

/*
 * fsnotify_mkdir - directory 'name' was created
 */
static inline void fsnotify_mkdir(struct inode *inode, const char *name)
{
	inode_dir_notify(inode, DN_CREATE);
	inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, name);
}

/*
 * 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);
}

/*
 * 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);
}

/*
 * 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);	
}

/*
 * fsnotify_close - file was closed
 */
static inline void fsnotify_close(struct file *file)
{
	struct dentry *dentry = file->f_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);
}

/*
 * 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);
}

/*
 * 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);
		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>
	18
	19	/*
	20	* fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
	21	*/
	22	static inline void fsnotify_move(struct inode old_dir, struct inode new_dir,
	23	const char old_name, const char new_name,
89204c40	24	int isdir, struct inode target, struct inode source)
0eeca283 RL	25	{
	26	u32 cookie = inotify_get_cookie();
	27
	28	if (old_dir == new_dir)
	29	inode_dir_notify(old_dir, DN_RENAME);
	30	else {
	31	inode_dir_notify(old_dir, DN_DELETE);
	32	inode_dir_notify(new_dir, DN_CREATE);
	33	}
	34
	35	if (isdir)
	36	isdir = IN_ISDIR;
	37	inotify_inode_queue_event(old_dir, IN_MOVED_FROM\|isdir,cookie,old_name);
	38	inotify_inode_queue_event(new_dir, IN_MOVED_TO\|isdir, cookie, new_name);
75449536 JM	39
	40	if (target) {
	41	inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL);
	42	inotify_inode_is_dead(target);
	43	}
89204c40 JM	44
	45	if (source) {
	46	inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL);
	47	}
0eeca283 RL	48	}
0eeca283 RL	49
7a91bf7f JM	50	/*
	51	* fsnotify_nameremove - a filename was removed from a directory
	52	*/
	53	static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
	54	{
	55	if (isdir)
	56	isdir = IN_ISDIR;
	57	dnotify_parent(dentry, DN_DELETE);
	58	inotify_dentry_parent_queue_event(dentry, IN_DELETE\|isdir, 0, dentry->d_name.name);
	59	}
	60
	61	/*
	62	* fsnotify_inoderemove - an inode is going away
	63	*/
	64	static inline void fsnotify_inoderemove(struct inode *inode)
	65	{
	66	inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL);
	67	inotify_inode_is_dead(inode);
	68	}
	69
0eeca283 RL	70	/*
	71	* fsnotify_create - 'name' was linked in
	72	*/
	73	static inline void fsnotify_create(struct inode inode, const char name)
	74	{
	75	inode_dir_notify(inode, DN_CREATE);
	76	inotify_inode_queue_event(inode, IN_CREATE, 0, name);
	77	}
	78
	79	/*
	80	* fsnotify_mkdir - directory 'name' was created
	81	*/
	82	static inline void fsnotify_mkdir(struct inode inode, const char name)
	83	{
	84	inode_dir_notify(inode, DN_CREATE);
	85	inotify_inode_queue_event(inode, IN_CREATE \| IN_ISDIR, 0, name);
	86	}
	87
	88	/*
	89	* fsnotify_access - file was read
	90	*/
	91	static inline void fsnotify_access(struct dentry *dentry)
	92	{
	93	struct inode *inode = dentry->d_inode;
	94	u32 mask = IN_ACCESS;
	95
	96	if (S_ISDIR(inode->i_mode))
	97	mask \|= IN_ISDIR;
	98
	99	dnotify_parent(dentry, DN_ACCESS);
	100	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	101	inotify_inode_queue_event(inode, mask, 0, NULL);
	102	}
	103
	104	/*
	105	* fsnotify_modify - file was modified
	106	*/
	107	static inline void fsnotify_modify(struct dentry *dentry)
	108	{
	109	struct inode *inode = dentry->d_inode;
	110	u32 mask = IN_MODIFY;
	111
	112	if (S_ISDIR(inode->i_mode))
	113	mask \|= IN_ISDIR;
	114
	115	dnotify_parent(dentry, DN_MODIFY);
	116	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	117	inotify_inode_queue_event(inode, mask, 0, NULL);
	118	}
	119
	120	/*
	121	* fsnotify_open - file was opened
	122	*/
	123	static inline void fsnotify_open(struct dentry *dentry)
	124	{
	125	struct inode *inode = dentry->d_inode;
	126	u32 mask = IN_OPEN;
	127
	128	if (S_ISDIR(inode->i_mode))
	129	mask \|= IN_ISDIR;
	130
0eeca283	131	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
5995f16b	132	inotify_inode_queue_event(inode, mask, 0, NULL);
0eeca283 RL	133	}
	134
	135	/*
	136	* fsnotify_close - file was closed
	137	*/
	138	static inline void fsnotify_close(struct file *file)
	139	{
	140	struct dentry *dentry = file->f_dentry;
	141	struct inode *inode = dentry->d_inode;
	142	const char *name = dentry->d_name.name;
	143	mode_t mode = file->f_mode;
	144	u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
	145
	146	if (S_ISDIR(inode->i_mode))
	147	mask \|= IN_ISDIR;
	148
	149	inotify_dentry_parent_queue_event(dentry, mask, 0, name);
	150	inotify_inode_queue_event(inode, mask, 0, NULL);
	151	}
	152
	153	/*
	154	* fsnotify_xattr - extended attributes were changed
	155	*/
	156	static inline void fsnotify_xattr(struct dentry *dentry)
	157	{
	158	struct inode *inode = dentry->d_inode;
	159	u32 mask = IN_ATTRIB;
	160
	161	if (S_ISDIR(inode->i_mode))
	162	mask \|= IN_ISDIR;
	163
	164	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
	165	inotify_inode_queue_event(inode, mask, 0, NULL);
	166	}
	167
	168	/*
	169	* fsnotify_change - notify_change event. file was modified and/or metadata
	170	* was changed.
	171	*/
	172	static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
	173	{
	174	struct inode *inode = dentry->d_inode;
	175	int dn_mask = 0;
	176	u32 in_mask = 0;
	177
	178	if (ia_valid & ATTR_UID) {
	179	in_mask \|= IN_ATTRIB;
	180	dn_mask \|= DN_ATTRIB;
	181	}
	182	if (ia_valid & ATTR_GID) {
	183	in_mask \|= IN_ATTRIB;
	184	dn_mask \|= DN_ATTRIB;
	185	}
	186	if (ia_valid & ATTR_SIZE) {
	187	in_mask \|= IN_MODIFY;
	188	dn_mask \|= DN_MODIFY;
	189	}
	190	/* both times implies a utime(s) call */
	191	if ((ia_valid & (ATTR_ATIME \| ATTR_MTIME)) == (ATTR_ATIME \| ATTR_MTIME))
	192	{
	193	in_mask \|= IN_ATTRIB;
	194	dn_mask \|= DN_ATTRIB;
	195	} else if (ia_valid & ATTR_ATIME) {
	196	in_mask \|= IN_ACCESS;
197	dn_mask \|= DN_ACCESS;
198	} else if (ia_valid & ATTR_MTIME) {
199	in_mask \|= IN_MODIFY;
200	dn_mask \|= DN_MODIFY;
201	}
202	if (ia_valid & ATTR_MODE) {
203	in_mask \|= IN_ATTRIB;
204	dn_mask \|= DN_ATTRIB;
205	}
206
207	if (dn_mask)
208	dnotify_parent(dentry, dn_mask);
209	if (in_mask) {
210	if (S_ISDIR(inode->i_mode))
211	in_mask \|= IN_ISDIR;
212	inotify_inode_queue_event(inode, in_mask, 0, NULL);
213	inotify_dentry_parent_queue_event(dentry, in_mask, 0,
214	dentry->d_name.name);
215	}
216	}
217
218	#ifdef CONFIG_INOTIFY /* inotify helpers */
219
220	/*
221	* fsnotify_oldname_init - save off the old filename before we change it
222	*/
223	static inline const char fsnotify_oldname_init(const char name)
224	{
225	return kstrdup(name, GFP_KERNEL);
226	}
227
228	/*
229	* fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
230	*/
231	static inline void fsnotify_oldname_free(const char *old_name)
232	{
233	kfree(old_name);
234	}
235
236	#else /* CONFIG_INOTIFY */
237
238	static inline const char fsnotify_oldname_init(const char name)
239	{
240	return NULL;
241	}
242
243	static inline void fsnotify_oldname_free(const char *old_name)
244	{
245	}
246
247	#endif /* ! CONFIG_INOTIFY */
248
249	#endif /* __KERNEL__ */
250
251	#endif /* _LINUX_FS_NOTIFY_H */