fs/overlayfs/dir.c

28 	int err;
32 		err = ovl_do_rmdir(ofs, wdir, wdentry);
34 		err = ovl_do_unlink(ofs, wdir, wdentry);
37 	if (err) {
39 		       wdentry, err);
42 	return err;
67 	int err;
77 		err = ovl_do_whiteout(ofs, wdir, whiteout);
78 		if (err) {
80 			whiteout = ERR_PTR(err);
91 		err = ovl_do_link(ofs, ofs->whiteout, wdir, whiteout);
92 		if (!err)
95 		if (err != -EMLINK) {
96 			pr_warn("Failed to link whiteout - disabling whiteout inode sharing(nlink=%u, err=%i)\n",
97 				ofs->whiteout->d_inode->i_nlink, err);
114 	int err;
118 	err = PTR_ERR(whiteout);
120 		return err;
125 	err = ovl_do_rename(ofs, wdir, whiteout, dir, dentry, flags);
126 	if (err)
133 	return err;
143 	int err;
146 	err = ovl_do_mkdir(ofs, dir, dentry, mode);
147 	if (err)
148 		return err;
161 		pr_warn("failed lookup after mkdir (%pd2, err=%i).\n",
162 			dentry, err);
174 	int err;
179 	err = -ESTALE;
184 		err = ovl_do_link(ofs, attr->hardlink, dir, newdentry);
188 			err = ovl_do_create(ofs, dir, newdentry, attr->mode);
193 			err =  ovl_mkdir_real(ofs, dir, &newdentry, attr->mode);
200 			err = ovl_do_mknod(ofs, dir, newdentry, attr->mode,
205 			err = ovl_do_symlink(ofs, dir, newdentry, attr->link);
209 			err = -EPERM;
212 	if (!err && WARN_ON(!newdentry->d_inode)) {
217 		err = -EIO;
220 	if (err) {
222 		return ERR_PTR(err);
238 	int err;
240 	err = ovl_check_setxattr(ofs, upper, OVL_XATTR_OPAQUE, "y", 1, xerr);
241 	if (!err)
244 	return err;
328 	int err;
338 	err = PTR_ERR(newdentry);
348 	err = ovl_instantiate(dentry, inode, newdentry, !!attr->hardlink);
349 	if (err)
353 	return err;
373 	int err;
378 	err = ovl_lock_rename_workdir(workdir, upperdir);
379 	if (err)
383 	err = vfs_getattr(&upperpath, &stat,
385 	if (err)
388 	err = -ESTALE;
396 	err = PTR_ERR(opaquedir);
400 	err = ovl_copy_xattr(dentry->d_sb, &upperpath, opaquedir);
401 	if (err)
404 	err = ovl_set_opaque(dentry, opaquedir);
405 	if (err)
409 	err = ovl_set_attr(ofs, opaquedir, &stat);
411 	if (err)
414 	err = ovl_do_rename(ofs, wdir, opaquedir, udir, upper, RENAME_EXCHANGE);
415 	if (err)
433 	return ERR_PTR(err);
455 	int err;
463 		err = posix_acl_create(dentry->d_parent->d_inode,
465 		if (err)
466 			return err;
469 	err = ovl_lock_rename_workdir(workdir, upperdir);
470 	if (err)
475 	err = PTR_ERR(upper);
479 	err = -ESTALE;
484 	err = PTR_ERR(newdentry);
499 		err = ovl_do_notify_change(ofs, newdentry, &attr);
501 		if (err)
505 		err = ovl_set_upper_acl(ofs, newdentry,
507 		if (err)
510 		err = ovl_set_upper_acl(ofs, newdentry,
512 		if (err)
517 		err = ovl_set_opaque(dentry, newdentry);
518 		if (err)
521 		err = ovl_do_rename(ofs, wdir, newdentry, udir, upper,
523 		if (err)
528 		err = ovl_do_rename(ofs, wdir, newdentry, udir, upper, 0);
529 		if (err)
532 	err = ovl_instantiate(dentry, inode, newdentry, hardlink);
533 	if (err) {
546 	return err;
557 	int err;
569 		err = ovl_set_impure(parent, ovl_dentry_upper(parent));
570 		if (err)
575 		err = -ENOMEM;
594 		err = security_dentry_create_files_as(dentry,
597 		if (err) {
606 		err = ovl_create_upper(dentry, inode, attr);
608 		err = ovl_create_over_whiteout(dentry, inode, attr);
612 	return err;
618 	int err;
625 	err = ovl_copy_up(dentry->d_parent);
626 	if (err)
627 		return err;
629 	err = ovl_want_write(dentry);
630 	if (err)
634 	err = -ENOMEM;
646 	err = ovl_create_or_link(dentry, inode, &attr, false);
654 	return err;
688 	int err;
691 	err = ovl_set_redirect(dentry, false);
694 	return err;
700 	int err;
703 	err = ovl_copy_up(old);
704 	if (err)
707 	err = ovl_copy_up(new->d_parent);
708 	if (err)
711 	err = ovl_nlink_start(old);
712 	if (err)
716 		err = ovl_set_link_redirect(old);
717 		if (err)
724 	err = ovl_create_or_link(new, inode,
727 	if (err)
733 	return err;
749 	int err;
756 		err = PTR_ERR(opaquedir);
761 	err = ovl_lock_rename_workdir(workdir, upperdir);
762 	if (err)
767 	err = PTR_ERR(upper);
771 	err = -ESTALE;
778 	err = ovl_cleanup_and_whiteout(ofs, d_inode(upperdir), upper);
779 	if (err)
792 	return err;
803 	int err;
807 		err = PTR_ERR(opaquedir);
815 	err = PTR_ERR(upper);
819 	err = -ESTALE;
825 		err = ovl_do_rmdir(ofs, dir, upper);
827 		err = ovl_do_unlink(ofs, dir, upper);
836 	if (!err)
844 	return err;
877 	int err;
884 		err = ovl_check_empty_dir(dentry, &list);
885 		if (err)
889 	err = ovl_copy_up(dentry->d_parent);
890 	if (err)
893 	err = ovl_nlink_start(dentry);
894 	if (err)
899 		err = ovl_remove_upper(dentry, is_dir, &list);
901 		err = ovl_remove_and_whiteout(dentry, &list);
903 	if (!err) {
922 	return err;
1037 	int err;
1049 	err = ovl_check_setxattr(ofs, ovl_dentry_upper(dentry),
1052 	if (!err) {
1059 				    err);
1061 		err = -EXDEV;
1063 	return err;
1070 	int err;
1089 	err = -EINVAL;
1096 	err = -EXDEV;
1103 		err = ovl_check_empty_dir(new, &list);
1104 		if (err)
1123 	err = ovl_copy_up(old);
1124 	if (err)
1127 	err = ovl_copy_up(new->d_parent);
1128 	if (err)
1131 		err = ovl_copy_up(new);
1132 		if (err)
1135 		err = ovl_nlink_start(new);
1136 		if (err)
1144 		err = ovl_want_write(old);
1145 		if (err)
1153 		err = PTR_ERR(opaquedir);
1171 			err = ovl_set_impure(new->d_parent, new_upperdir);
1172 			if (err)
1176 			err = ovl_set_impure(old->d_parent, old_upperdir);
1177 			if (err)
1184 		err = PTR_ERR(trap);
1190 	err = PTR_ERR(olddentry);
1194 	err = -ESTALE;
1200 	err = PTR_ERR(newdentry);
1207 	err = -ESTALE;
1234 	err = 0;
1236 		err = ovl_set_redirect(old, samedir);
1238 		err = ovl_set_opaque_xerr(old, olddentry, -EXDEV);
1239 	if (err)
1243 		err = ovl_set_redirect(new, samedir);
1246 		err = ovl_set_opaque_xerr(new, newdentry, -EXDEV);
1247 	if (err)
1250 	err = ovl_do_rename(ofs, old_upperdir->d_inode, olddentry,
1252 	if (err)
1290 	return err;