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#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 */