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129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* $NetBSD: accessors.c,v 1.2 2015/04/03 16:37:02 pooka Exp $ */
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/*
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* Copyright (c) 2007-2011 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* This file contains various data structure accessor routines.
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* They are meant to help clients that make calls into the depths
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* of the kernel (e.g. at vfs layer) bypassing the syscall layer.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: accessors.c,v 1.2 2015/04/03 16:37:02 pooka Exp $");
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#include <sys/param.h>
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#include <sys/kauth.h>
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#include <sys/kmem.h>
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#include <sys/uio.h>
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#include "rump_private.h"
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struct uio *
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rump_uio_setup(void *buf, size_t bufsize, off_t offset, enum rump_uiorw rw)
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{
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struct uio *uio;
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enum uio_rw uiorw;
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switch (rw) {
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case RUMPUIO_READ:
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uiorw = UIO_READ;
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break;
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case RUMPUIO_WRITE:
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uiorw = UIO_WRITE;
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break;
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default:
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panic("%s: invalid rw %d", __func__, rw);
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}
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uio = kmem_alloc(sizeof(struct uio), KM_SLEEP);
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uio->uio_iov = kmem_alloc(sizeof(struct iovec), KM_SLEEP);
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uio->uio_iov->iov_base = buf;
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uio->uio_iov->iov_len = bufsize;
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uio->uio_iovcnt = 1;
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uio->uio_offset = offset;
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uio->uio_resid = bufsize;
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uio->uio_rw = uiorw;
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uio->uio_vmspace = curproc->p_vmspace;
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return uio;
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}
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size_t
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rump_uio_getresid(struct uio *uio)
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{
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return uio->uio_resid;
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}
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off_t
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rump_uio_getoff(struct uio *uio)
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{
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return uio->uio_offset;
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}
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size_t
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rump_uio_free(struct uio *uio)
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{
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size_t resid;
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resid = uio->uio_resid;
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kmem_free(uio->uio_iov, sizeof(*uio->uio_iov));
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kmem_free(uio, sizeof(*uio));
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return resid;
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}
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kauth_cred_t
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rump_cred_create(uid_t uid, gid_t gid, size_t ngroups, gid_t *groups)
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{
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kauth_cred_t cred;
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int rv;
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cred = kauth_cred_alloc();
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kauth_cred_setuid(cred, uid);
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kauth_cred_seteuid(cred, uid);
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kauth_cred_setsvuid(cred, uid);
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kauth_cred_setgid(cred, gid);
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kauth_cred_setgid(cred, gid);
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kauth_cred_setegid(cred, gid);
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kauth_cred_setsvgid(cred, gid);
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rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE);
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/* oh this is silly. and by "this" I mean kauth_cred_setgroups() */
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assert(rv == 0);
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return cred;
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}
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void
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rump_cred_put(kauth_cred_t cred)
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{
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kauth_cred_free(cred);
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}
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