[net-next-2.6.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 dentry *moved)
{
	struct inode *source = moved->d_inode;
	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, moved, 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, 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, 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,
5a190ae6	44	int isdir, struct inode target, struct dentry moved)
0eeca283	45	{
5a190ae6	46	struct inode *source = moved->d_inode;
0eeca283 RL	47	u32 cookie = inotify_get_cookie();
	48
	49	if (old_dir == new_dir)
	50	inode_dir_notify(old_dir, DN_RENAME);
	51	else {
	52	inode_dir_notify(old_dir, DN_DELETE);
	53	inode_dir_notify(new_dir, DN_CREATE);
	54	}
	55
	56	if (isdir)
	57	isdir = IN_ISDIR;
7c297722 AG	58	inotify_inode_queue_event(old_dir, IN_MOVED_FROM\|isdir,cookie,old_name,
	59	source);
	60	inotify_inode_queue_event(new_dir, IN_MOVED_TO\|isdir, cookie, new_name,
	61	source);
75449536 JM	62
75449536 JM	63	if (target) {
7c297722	64	inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
75449536 JM	65	inotify_inode_is_dead(target);
75449536 JM	66	}
89204c40 JM	67
89204c40 JM	68	if (source) {
7c297722	69	inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
89204c40	70	}
5a190ae6	71	audit_inode_child(new_name, moved, new_dir);
0eeca283 RL	72	}
0eeca283 RL	73
7a91bf7f JM	74	/*
	75	* fsnotify_nameremove - a filename was removed from a directory
	76	*/
	77	static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
	78	{
	79	if (isdir)
	80	isdir = IN_ISDIR;
	81	dnotify_parent(dentry, DN_DELETE);
	82	inotify_dentry_parent_queue_event(dentry, IN_DELETE\|isdir, 0, dentry->d_name.name);
	83	}
	84
	85	/*
	86	* fsnotify_inoderemove - an inode is going away
	87	*/
	88	static inline void fsnotify_inoderemove(struct inode *inode)
	89	{
7c297722	90	inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
7a91bf7f JM	91	inotify_inode_is_dead(inode);
	92	}
	93
0eeca283 RL	94	/*
	95	* fsnotify_create - 'name' was linked in
	96	*/
f38aa942	97	static inline void fsnotify_create(struct inode inode, struct dentry dentry)
0eeca283 RL	98	{
0eeca283 RL	99	inode_dir_notify(inode, DN_CREATE);
7c297722 AG	100	inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
7c297722 AG	101	dentry->d_inode);
5a190ae6	102	audit_inode_child(dentry->d_name.name, dentry, inode);
0eeca283 RL	103	}
	104
	105	/*
	106	* fsnotify_mkdir - directory 'name' was created
	107	*/
f38aa942	108	static inline void fsnotify_mkdir(struct inode inode, struct dentry dentry)
0eeca283 RL	109	{
0eeca283 RL	110	inode_dir_notify(inode, DN_CREATE);
f38aa942	111	inotify_inode_queue_event(inode, IN_CREATE \| IN_ISDIR, 0,
7c297722	112	dentry->d_name.name, dentry->d_inode);
5a190ae6	113	audit_inode_child(dentry->d_name.name, dentry, inode);
0eeca283 RL	114	}
	115
	116	/*
	117	* fsnotify_access - file was read
	118	*/
	119	static inline void fsnotify_access(struct dentry *dentry)
	120	{
	121	struct inode *inode = dentry->d_inode;
	122	u32 mask = IN_ACCESS;
	123
	124	if (S_ISDIR(inode->i_mode))
	125	mask \|= IN_ISDIR;
	126
	127	dnotify_parent(dentry, DN_ACCESS);
	128	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	129	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	130	}
	131
	132	/*
	133	* fsnotify_modify - file was modified
	134	*/
	135	static inline void fsnotify_modify(struct dentry *dentry)
	136	{
	137	struct inode *inode = dentry->d_inode;
	138	u32 mask = IN_MODIFY;
	139
	140	if (S_ISDIR(inode->i_mode))
	141	mask \|= IN_ISDIR;
	142
	143	dnotify_parent(dentry, DN_MODIFY);
	144	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	145	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	146	}
	147
	148	/*
	149	* fsnotify_open - file was opened
	150	*/
	151	static inline void fsnotify_open(struct dentry *dentry)
	152	{
	153	struct inode *inode = dentry->d_inode;
	154	u32 mask = IN_OPEN;
	155
	156	if (S_ISDIR(inode->i_mode))
	157	mask \|= IN_ISDIR;
	158
0eeca283	159	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	160	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	161	}
	162
	163	/*
	164	* fsnotify_close - file was closed
	165	*/
	166	static inline void fsnotify_close(struct file *file)
	167	{
0f7fc9e4	168	struct dentry *dentry = file->f_path.dentry;
0eeca283 RL	169	struct inode *inode = dentry->d_inode;
	170	const char *name = dentry->d_name.name;
	171	mode_t mode = file->f_mode;
	172	u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
	173
	174	if (S_ISDIR(inode->i_mode))
	175	mask \|= IN_ISDIR;
	176
	177	inotify_dentry_parent_queue_event(dentry, mask, 0, name);
7c297722	178	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	179	}
	180
	181	/*
	182	* fsnotify_xattr - extended attributes were changed
	183	*/
	184	static inline void fsnotify_xattr(struct dentry *dentry)
	185	{
	186	struct inode *inode = dentry->d_inode;
	187	u32 mask = IN_ATTRIB;
	188
	189	if (S_ISDIR(inode->i_mode))
	190	mask \|= IN_ISDIR;
	191
	192	inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
7c297722	193	inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
0eeca283 RL	194	}
	195
	196	/*
	197	* fsnotify_change - notify_change event. file was modified and/or metadata
	198	* was changed.
	199	*/
	200	static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
	201	{
	202	struct inode *inode = dentry->d_inode;
	203	int dn_mask = 0;
	204	u32 in_mask = 0;
	205
	206	if (ia_valid & ATTR_UID) {
	207	in_mask \|= IN_ATTRIB;
	208	dn_mask \|= DN_ATTRIB;
	209	}
	210	if (ia_valid & ATTR_GID) {
	211	in_mask \|= IN_ATTRIB;
	212	dn_mask \|= DN_ATTRIB;
	213	}
	214	if (ia_valid & ATTR_SIZE) {
	215	in_mask \|= IN_MODIFY;
	216	dn_mask \|= DN_MODIFY;
	217	}
	218	/* both times implies a utime(s) call */
	219	if ((ia_valid & (ATTR_ATIME \| ATTR_MTIME)) == (ATTR_ATIME \| ATTR_MTIME))
	220	{
	221	in_mask \|= IN_ATTRIB;
	222	dn_mask \|= DN_ATTRIB;
	223	} else if (ia_valid & ATTR_ATIME) {
	224	in_mask \|= IN_ACCESS;
	225	dn_mask \|= DN_ACCESS;
	226	} else if (ia_valid & ATTR_MTIME) {
	227	in_mask \|= IN_MODIFY;
	228	dn_mask \|= DN_MODIFY;
	229	}
	230	if (ia_valid & ATTR_MODE) {
	231	in_mask \|= IN_ATTRIB;
	232	dn_mask \|= DN_ATTRIB;
	233	}
	234
	235	if (dn_mask)
	236	dnotify_parent(dentry, dn_mask);
	237	if (in_mask) {
	238	if (S_ISDIR(inode->i_mode))
	239	in_mask \|= IN_ISDIR;
7c297722	240	inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
0eeca283 RL	241	inotify_dentry_parent_queue_event(dentry, in_mask, 0,
	242	dentry->d_name.name);
	243	}
	244	}
	245
	246	#ifdef CONFIG_INOTIFY /* inotify helpers */
	247
	248	/*
	249	* fsnotify_oldname_init - save off the old filename before we change it
	250	*/
	251	static inline const char fsnotify_oldname_init(const char name)
	252	{
	253	return kstrdup(name, GFP_KERNEL);
	254	}
	255
	256	/*
	257	* fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
	258	*/
	259	static inline void fsnotify_oldname_free(const char *old_name)
	260	{
	261	kfree(old_name);
	262	}
	263
	264	#else /* CONFIG_INOTIFY */
	265
	266	static inline const char fsnotify_oldname_init(const char name)
	267	{
	268	return NULL;
	269	}
	270
	271	static inline void fsnotify_oldname_free(const char *old_name)
	272	{
	273	}
	274
	275	#endif /* ! CONFIG_INOTIFY */
	276
	277	#endif /* __KERNEL__ */
	278
	279	#endif /* _LINUX_FS_NOTIFY_H */