113 	struct ovl_fh *fh = NULL;  in ovl_get_fh()  local
125 	fh = kzalloc(res + OVL_FH_WIRE_OFFSET, GFP_KERNEL);  in ovl_get_fh()
126 	if (!fh)  in ovl_get_fh()
129 	res = ovl_getxattr_upper(ofs, upperdentry, ox, fh->buf, res);  in ovl_get_fh()
133 	err = ovl_check_fb_len(&fh->fb, res);  in ovl_get_fh()
140 	return fh;  in ovl_get_fh()
143 	kfree(fh);  in ovl_get_fh()
150 	pr_warn_ratelimited("invalid origin (%*phN)\n", res, fh);  in ovl_get_fh()
154 struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh,  in ovl_decode_real_fh()  argument
168 	if (ofs->config.uuid ? !uuid_equal(&fh->fb.uuid, &mnt->mnt_sb->s_uuid) :  in ovl_decode_real_fh()
169 			      !uuid_is_null(&fh->fb.uuid))  in ovl_decode_real_fh()
172 	bytes = (fh->fb.len - offsetof(struct ovl_fb, fid));  in ovl_decode_real_fh()
173 	real = exportfs_decode_fh(mnt, (struct fid *)fh->fb.fid,  in ovl_decode_real_fh()
174 				  bytes >> 2, (int)fh->fb.type,  in ovl_decode_real_fh()
184 		    !(fh->fb.flags & OVL_FH_FLAG_PATH_UPPER))  in ovl_decode_real_fh()
353 int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected,  in ovl_check_origin_fh()  argument
368 		origin = ovl_decode_real_fh(ofs, fh, ofs->layers[i].mnt,  in ovl_check_origin_fh()
407 	struct ovl_fh *fh = ovl_get_fh(ofs, upperdentry, OVL_XATTR_ORIGIN);  in ovl_check_origin()  local
410 	if (IS_ERR_OR_NULL(fh))  in ovl_check_origin()
411 		return PTR_ERR(fh);  in ovl_check_origin()
413 	err = ovl_check_origin_fh(ofs, fh, false, upperdentry, stackp);  in ovl_check_origin()
414 	kfree(fh);  in ovl_check_origin()
430 			 enum ovl_xattr ox, const struct ovl_fh *fh)  in ovl_verify_fh()  argument
441 	if (fh->fb.len != ofh->fb.len || memcmp(&fh->fb, &ofh->fb, fh->fb.len))  in ovl_verify_fh()
461 	struct ovl_fh *fh;  in ovl_verify_set_fh()  local
464 	fh = ovl_encode_real_fh(ofs, real, is_upper);  in ovl_verify_set_fh()
465 	err = PTR_ERR(fh);  in ovl_verify_set_fh()
466 	if (IS_ERR(fh)) {  in ovl_verify_set_fh()
467 		fh = NULL;  in ovl_verify_set_fh()
471 	err = ovl_verify_fh(ofs, dentry, ox, fh);  in ovl_verify_set_fh()
473 		err = ovl_setxattr(ofs, dentry, ox, fh->buf, fh->fb.len);  in ovl_verify_set_fh()
478 	kfree(fh);  in ovl_verify_set_fh()
492 	struct ovl_fh *fh;  in ovl_index_upper()  local
498 	fh = ovl_get_fh(ofs, index, OVL_XATTR_UPPER);  in ovl_index_upper()
499 	if (IS_ERR_OR_NULL(fh))  in ovl_index_upper()
500 		return ERR_CAST(fh);  in ovl_index_upper()
502 	upper = ovl_decode_real_fh(ofs, fh, ovl_upper_mnt(ofs), true);  in ovl_index_upper()
503 	kfree(fh);  in ovl_index_upper()
525 	struct ovl_fh *fh = NULL;  in ovl_verify_index()  local
541 	fh = kzalloc(len + OVL_FH_WIRE_OFFSET, GFP_KERNEL);  in ovl_verify_index()
542 	if (!fh)  in ovl_verify_index()
546 	if (hex2bin(fh->buf, index->d_name.name, len))  in ovl_verify_index()
549 	err = ovl_check_fb_len(&fh->fb, len);  in ovl_verify_index()
591 	err = ovl_verify_fh(ofs, upper, OVL_XATTR_ORIGIN, fh);  in ovl_verify_index()
598 		err = ovl_check_origin_fh(ofs, fh, false, index, &stack);  in ovl_verify_index()
608 	kfree(fh);  in ovl_verify_index()
624 static int ovl_get_index_name_fh(struct ovl_fh *fh, struct qstr *name)  in ovl_get_index_name_fh()  argument
628 	n = kcalloc(fh->fb.len, 2, GFP_KERNEL);  in ovl_get_index_name_fh()
632 	s  = bin2hex(n, fh->buf, fh->fb.len);  in ovl_get_index_name_fh()
657 	struct ovl_fh *fh;  in ovl_get_index_name()  local
660 	fh = ovl_encode_real_fh(ofs, origin, false);  in ovl_get_index_name()
661 	if (IS_ERR(fh))  in ovl_get_index_name()
662 		return PTR_ERR(fh);  in ovl_get_index_name()
664 	err = ovl_get_index_name_fh(fh, name);  in ovl_get_index_name()
666 	kfree(fh);  in ovl_get_index_name()
671 struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh)  in ovl_get_index_fh()  argument
677 	err = ovl_get_index_name_fh(fh, &name);  in ovl_get_index_fh()