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While OpenSolaris libc and glibc both include XDR support, the musl libc does not in favor of depending on the BSD-licensed libtirpc library. Adding support is a simple matter of detecting the library, including the headers and linking against it. By default libtirpc will be checked for and if available used. Otherwise, configure will fall back to using the xdr implementation provided by libc if available. The options --with-tirpc/--without-tirpc can be used to disable this checking. In addition, the xdr_control() function has been simplied to only handle ZFSs specific use case. Original-patch-by: stf <s@ctrlc.hu> Original-patch-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Signed-off-by: Carlo Landmeter <clandmeter@gmail.com> Closes #2254 Closes #4559
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
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* All Rights Reserved
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*
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* Portions of this source code were derived from Berkeley 4.3 BSD
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* under license from the Regents of the University of California.
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*/
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#ifndef LIBSPL_RPC_XDR_H
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#define LIBSPL_RPC_XDR_H
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/*
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* When available prefer libtirpc for xdr functionality. This library is
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* mandatory when compiling with musl libc because it does not provide xdr.
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*/
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#if defined(HAVE_LIBTIRPC)
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#include <tirpc/rpc/xdr.h>
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#ifdef xdr_control
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#undef xdr_control
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#endif
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#else
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#include_next <rpc/xdr.h>
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#endif /* HAVE_LIBTIRPC */
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#define XDR_GET_BYTES_AVAIL 1
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typedef struct xdr_bytesrec {
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bool_t xc_is_last_record;
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size_t xc_num_avail;
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} xdr_bytesrec_t;
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/*
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* This functionality is not required and is disabled in user space.
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*/
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static inline bool_t
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xdr_control(XDR *xdrs, int request, void *info)
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{
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xdr_bytesrec_t *xptr;
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ASSERT3U(request, ==, XDR_GET_BYTES_AVAIL);
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xptr = (xdr_bytesrec_t *)info;
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xptr->xc_is_last_record = TRUE;
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xptr->xc_num_avail = xdrs->x_handy;
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return (TRUE);
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}
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#endif /* LIBSPL_RPC_XDR_H */
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