1/*	$NetBSD: netbsd32_fd.c,v 1.1 2018/12/24 21:27:05 mrg Exp $	*/
2
3/*
4 * Copyright (c) 1998, 2001, 2008, 2018 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * from: NetBSD: netbsd32_netbsd.c,v 1.221 2018/12/24 20:44:39 mrg Exp
29 */
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: netbsd32_fd.c,v 1.1 2018/12/24 21:27:05 mrg Exp $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/filedesc.h>
37#include <sys/namei.h>
38#include <sys/vnode.h>
39#include <sys/vfs_syscalls.h>
40#include <sys/kauth.h>
41
42#include <compat/netbsd32/netbsd32.h>
43#include <compat/netbsd32/netbsd32_syscall.h>
44#include <compat/netbsd32/netbsd32_syscallargs.h>
45#include <compat/netbsd32/netbsd32_conv.h>
46
47
48int
49netbsd32___getfh30(struct lwp *l, const struct netbsd32___getfh30_args *uap, register_t *retval)
50{
51	/* {
52		syscallarg(const netbsd32_charp) fname;
53		syscallarg(netbsd32_fhandlep_t) fhp;
54		syscallarg(netbsd32_size_tp) fh_size;
55	} */
56	struct vnode *vp;
57	fhandle_t *fh;
58	int error;
59	struct pathbuf *pb;
60	struct nameidata nd;
61	netbsd32_size_t usz32, sz32;
62	size_t sz;
63
64	/*
65	 * Must be super user
66	 */
67	error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FILEHANDLE,
68	    0, NULL, NULL, NULL);
69	if (error)
70		return error;
71
72	error = pathbuf_copyin(SCARG_P32(uap, fname), &pb);
73	if (error) {
74		return error;
75	}
76
77	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, pb);
78	error = namei(&nd);
79	if (error) {
80		pathbuf_destroy(pb);
81		return error;
82	}
83	vp = nd.ni_vp;
84	pathbuf_destroy(pb);
85
86	error = vfs_composefh_alloc(vp, &fh);
87	vput(vp);
88	if (error != 0) {
89		return error;
90	}
91	error = copyin(SCARG_P32(uap, fh_size), &usz32, sizeof(usz32));
92	if (error != 0) {
93		goto out;
94	}
95	sz = FHANDLE_SIZE(fh);
96	sz32 = sz;
97
98	error = copyout(&sz32, SCARG_P32(uap, fh_size), sizeof(sz32));
99	if (error != 0) {
100		goto out;
101	}
102	if (usz32 >= sz32) {
103		error = copyout(fh, SCARG_P32(uap, fhp), sz);
104	} else {
105		error = E2BIG;
106	}
107out:
108	vfs_composefh_free(fh);
109	return error;
110}
111
112int
113netbsd32_pipe2(struct lwp *l, const struct netbsd32_pipe2_args *uap,
114	       register_t *retval)
115{
116	/* {
117		syscallarg(netbsd32_intp) fildes;
118		syscallarg(int) flags;
119	} */
120	int fd[2], error;
121
122	error = pipe1(l, fd, SCARG(uap, flags));
123	if (error != 0)
124		return error;
125
126	error = copyout(fd, SCARG_P32(uap, fildes), sizeof(fd));
127	if (error != 0)
128		return error;
129
130	retval[0] = 0;
131	return 0;
132}
133