5a190ae697
makes caller simpler *and* allows to scan ancestors Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
279 lines
6.7 KiB
C
279 lines
6.7 KiB
C
#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 */
|