17 void ovl_cleanup(struct inode *wdir, struct dentry *wdentry)  in ovl_cleanup()
34 struct dentry *ovl_lookup_temp(struct dentry *workdir, struct dentry *dentry)  in ovl_lookup_temp()  argument
36 	struct dentry *temp;  in ovl_lookup_temp()
39 	snprintf(name, sizeof(name), "#%lx", (unsigned long) dentry);  in ovl_lookup_temp()
52 static struct dentry *ovl_whiteout(struct dentry *workdir,  in ovl_whiteout()
53 				   struct dentry *dentry)  in ovl_whiteout()  argument
56 	struct dentry *whiteout;  in ovl_whiteout()
59 	whiteout = ovl_lookup_temp(workdir, dentry);  in ovl_whiteout()
72 int ovl_create_real(struct inode *dir, struct dentry *newdentry,  in ovl_create_real()
74 		    struct dentry *hardlink, bool debug)  in ovl_create_real()
119 static int ovl_set_opaque(struct dentry *upperdentry)  in ovl_set_opaque()
124 static void ovl_remove_opaque(struct dentry *upperdentry)  in ovl_remove_opaque()
135 static int ovl_dir_getattr(struct vfsmount *mnt, struct dentry *dentry,  in ovl_dir_getattr()  argument
142 	type = ovl_path_real(dentry, &realpath);  in ovl_dir_getattr()
147 	stat->dev = dentry->d_sb->s_dev;  in ovl_dir_getattr()
148 	stat->ino = dentry->d_inode->i_ino;  in ovl_dir_getattr()
161 static int ovl_create_upper(struct dentry *dentry, struct inode *inode,  in ovl_create_upper()  argument
163 			    struct dentry *hardlink)  in ovl_create_upper()
165 	struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_create_upper()
167 	struct dentry *newdentry;  in ovl_create_upper()
171 	newdentry = lookup_one_len(dentry->d_name.name, upperdir,  in ovl_create_upper()
172 				   dentry->d_name.len);  in ovl_create_upper()
180 	ovl_dentry_version_inc(dentry->d_parent);  in ovl_create_upper()
181 	ovl_dentry_update(dentry, newdentry);  in ovl_create_upper()
183 	d_instantiate(dentry, inode);  in ovl_create_upper()
192 static int ovl_lock_rename_workdir(struct dentry *workdir,  in ovl_lock_rename_workdir()
193 				   struct dentry *upperdir)  in ovl_lock_rename_workdir()
212 static struct dentry *ovl_clear_empty(struct dentry *dentry,  in ovl_clear_empty()  argument
215 	struct dentry *workdir = ovl_workdir(dentry);  in ovl_clear_empty()
217 	struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_clear_empty()
220 	struct dentry *upper;  in ovl_clear_empty()
221 	struct dentry *opaquedir;  in ovl_clear_empty()
232 	ovl_path_upper(dentry, &upperpath);  in ovl_clear_empty()
240 	upper = upperpath.dentry;  in ovl_clear_empty()
244 	opaquedir = ovl_lookup_temp(workdir, dentry);  in ovl_clear_empty()
276 	d_drop(dentry);  in ovl_clear_empty()
290 static struct dentry *ovl_check_empty_and_clear(struct dentry *dentry)  in ovl_check_empty_and_clear()  argument
293 	struct dentry *ret = NULL;  in ovl_check_empty_and_clear()
296 	err = ovl_check_empty_dir(dentry, &list);  in ovl_check_empty_and_clear()
307 		if (ovl_dentry_upper(dentry))  in ovl_check_empty_and_clear()
308 			ret = ovl_clear_empty(dentry, &list);  in ovl_check_empty_and_clear()
316 static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,  in ovl_create_over_whiteout()  argument
318 				    struct dentry *hardlink)  in ovl_create_over_whiteout()
320 	struct dentry *workdir = ovl_workdir(dentry);  in ovl_create_over_whiteout()
322 	struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_create_over_whiteout()
324 	struct dentry *upper;  in ovl_create_over_whiteout()
325 	struct dentry *newdentry;  in ovl_create_over_whiteout()
335 	newdentry = ovl_lookup_temp(workdir, dentry);  in ovl_create_over_whiteout()
340 	upper = lookup_one_len(dentry->d_name.name, upperdir,  in ovl_create_over_whiteout()
341 			       dentry->d_name.len);  in ovl_create_over_whiteout()
366 	ovl_dentry_version_inc(dentry->d_parent);  in ovl_create_over_whiteout()
367 	ovl_dentry_update(dentry, newdentry);  in ovl_create_over_whiteout()
369 	d_instantiate(dentry, inode);  in ovl_create_over_whiteout()
385 static int ovl_create_or_link(struct dentry *dentry, int mode, dev_t rdev,  in ovl_create_or_link()  argument
386 			      const char *link, struct dentry *hardlink)  in ovl_create_or_link()
396 	inode = ovl_new_inode(dentry->d_sb, mode, dentry->d_fsdata);  in ovl_create_or_link()
400 	err = ovl_copy_up(dentry->d_parent);  in ovl_create_or_link()
404 	if (!ovl_dentry_is_opaque(dentry)) {  in ovl_create_or_link()
405 		err = ovl_create_upper(dentry, inode, &stat, link, hardlink);  in ovl_create_or_link()
425 		err = ovl_create_over_whiteout(dentry, inode, &stat, link,  in ovl_create_or_link()
440 static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev,  in ovl_create_object()  argument
445 	err = ovl_want_write(dentry);  in ovl_create_object()
447 		err = ovl_create_or_link(dentry, mode, rdev, link, NULL);  in ovl_create_object()
448 		ovl_drop_write(dentry);  in ovl_create_object()
454 static int ovl_create(struct inode *dir, struct dentry *dentry, umode_t mode,  in ovl_create()  argument
457 	return ovl_create_object(dentry, (mode & 07777) | S_IFREG, 0, NULL);  in ovl_create()
460 static int ovl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)  in ovl_mkdir()  argument
462 	return ovl_create_object(dentry, (mode & 07777) | S_IFDIR, 0, NULL);  in ovl_mkdir()
465 static int ovl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,  in ovl_mknod()  argument
472 	return ovl_create_object(dentry, mode, rdev, NULL);  in ovl_mknod()
475 static int ovl_symlink(struct inode *dir, struct dentry *dentry,  in ovl_symlink()  argument
478 	return ovl_create_object(dentry, S_IFLNK, 0, link);  in ovl_symlink()
481 static int ovl_link(struct dentry *old, struct inode *newdir,  in ovl_link()
482 		    struct dentry *new)  in ovl_link()
485 	struct dentry *upper;  in ovl_link()
504 static int ovl_remove_and_whiteout(struct dentry *dentry, bool is_dir)  in ovl_remove_and_whiteout()  argument
506 	struct dentry *workdir = ovl_workdir(dentry);  in ovl_remove_and_whiteout()
508 	struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_remove_and_whiteout()
510 	struct dentry *whiteout;  in ovl_remove_and_whiteout()
511 	struct dentry *upper;  in ovl_remove_and_whiteout()
512 	struct dentry *opaquedir = NULL;  in ovl_remove_and_whiteout()
519 		if (OVL_TYPE_MERGE_OR_LOWER(ovl_path_type(dentry))) {  in ovl_remove_and_whiteout()
520 			opaquedir = ovl_check_empty_and_clear(dentry);  in ovl_remove_and_whiteout()
532 			err = ovl_check_empty_dir(dentry, &list);  in ovl_remove_and_whiteout()
543 	whiteout = ovl_whiteout(workdir, dentry);  in ovl_remove_and_whiteout()
548 	upper = ovl_dentry_upper(dentry);  in ovl_remove_and_whiteout()
550 		upper = lookup_one_len(dentry->d_name.name, upperdir,  in ovl_remove_and_whiteout()
551 				       dentry->d_name.len);  in ovl_remove_and_whiteout()
579 	ovl_dentry_version_inc(dentry->d_parent);  in ovl_remove_and_whiteout()
581 	d_drop(dentry);  in ovl_remove_and_whiteout()
595 static int ovl_remove_upper(struct dentry *dentry, bool is_dir)  in ovl_remove_upper()  argument
597 	struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);  in ovl_remove_upper()
599 	struct dentry *upper = ovl_dentry_upper(dentry);  in ovl_remove_upper()
612 		ovl_dentry_version_inc(dentry->d_parent);  in ovl_remove_upper()
622 		d_drop(dentry);  in ovl_remove_upper()
628 static inline int ovl_check_sticky(struct dentry *dentry)  in ovl_check_sticky()  argument
630 	struct inode *dir = ovl_dentry_real(dentry->d_parent)->d_inode;  in ovl_check_sticky()
631 	struct inode *inode = ovl_dentry_real(dentry)->d_inode;  in ovl_check_sticky()
639 static int ovl_do_remove(struct dentry *dentry, bool is_dir)  in ovl_do_remove()  argument
644 	err = ovl_check_sticky(dentry);  in ovl_do_remove()
648 	err = ovl_want_write(dentry);  in ovl_do_remove()
652 	err = ovl_copy_up(dentry->d_parent);  in ovl_do_remove()
656 	type = ovl_path_type(dentry);  in ovl_do_remove()
658 		err = ovl_remove_upper(dentry, is_dir);  in ovl_do_remove()
682 		err = ovl_remove_and_whiteout(dentry, is_dir);  in ovl_do_remove()
688 	ovl_drop_write(dentry);  in ovl_do_remove()
693 static int ovl_unlink(struct inode *dir, struct dentry *dentry)  in ovl_unlink()  argument
695 	return ovl_do_remove(dentry, false);  in ovl_unlink()
698 static int ovl_rmdir(struct inode *dir, struct dentry *dentry)  in ovl_rmdir()  argument
700 	return ovl_do_remove(dentry, true);  in ovl_rmdir()
703 static int ovl_rename2(struct inode *olddir, struct dentry *old,  in ovl_rename2()
704 		       struct inode *newdir, struct dentry *new,  in ovl_rename2()
710 	struct dentry *old_upperdir;  in ovl_rename2()
711 	struct dentry *new_upperdir;  in ovl_rename2()
712 	struct dentry *olddentry;  in ovl_rename2()
713 	struct dentry *newdentry;  in ovl_rename2()
714 	struct dentry *trap;  in ovl_rename2()
722 	struct dentry *opaquedir = NULL;  in ovl_rename2()