freebsd-dev/sys/compat/freebsd32/freebsd32_ioctl.c

/*-
 * Copyright (c) 2008 David E. O'Brien
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the author nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_compat.h"

#include <sys/param.h>
#include <sys/capsicum.h>
#include <sys/cdio.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <sys/file.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
#include <sys/mdioctl.h>
#include <sys/memrange.h>
#include <sys/pciio.h>
#include <sys/proc.h>
#include <sys/syscall.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/systm.h>

#include <compat/freebsd32/freebsd32.h>
#include <compat/freebsd32/freebsd32_ioctl.h>
#include <compat/freebsd32/freebsd32_proto.h>

/* Cannot get exact size in 64-bit due to alignment issue of entire struct. */
CTASSERT((sizeof(struct md_ioctl32)+4) == 436);
CTASSERT(sizeof(struct ioc_read_toc_entry32) == 8);
CTASSERT(sizeof(struct ioc_toc_header32) == 4);
CTASSERT(sizeof(struct mem_range_op32) == 12);
CTASSERT(sizeof(struct pci_conf_io32) == 36);
CTASSERT(sizeof(struct pci_match_conf32) == 44);
CTASSERT(sizeof(struct pci_conf32) == 44);


static int
freebsd32_ioctl_md(struct thread *td, struct freebsd32_ioctl_args *uap,
    struct file *fp)
{
	struct md_ioctl mdv;
	struct md_ioctl32 md32;
	u_long com = 0;
	int i, error;

	if (uap->com & IOC_IN) {
		if ((error = copyin(uap->data, &md32, sizeof(md32)))) {
			return (error);
		}
		CP(md32, mdv, md_version);
		CP(md32, mdv, md_unit);
		CP(md32, mdv, md_type);
		PTRIN_CP(md32, mdv, md_file);
		CP(md32, mdv, md_mediasize);
		CP(md32, mdv, md_sectorsize);
		CP(md32, mdv, md_options);
		CP(md32, mdv, md_base);
		CP(md32, mdv, md_fwheads);
		CP(md32, mdv, md_fwsectors);
	} else if (uap->com & IOC_OUT) {
		/*
		 * Zero the buffer so the user always
		 * gets back something deterministic.
		 */
		bzero(&mdv, sizeof mdv);
	}

	switch (uap->com) {
	case MDIOCATTACH_32:
		com = MDIOCATTACH;
		break;
	case MDIOCDETACH_32:
		com = MDIOCDETACH;
		break;
	case MDIOCQUERY_32:
		com = MDIOCQUERY;
		break;
	case MDIOCLIST_32:
		com = MDIOCLIST;
		break;
	default:
		panic("%s: unknown MDIOC %#x", __func__, uap->com);
	}
	error = fo_ioctl(fp, com, (caddr_t)&mdv, td->td_ucred, td);
	if (error == 0 && (com & IOC_OUT)) {
		CP(mdv, md32, md_version);
		CP(mdv, md32, md_unit);
		CP(mdv, md32, md_type);
		PTROUT_CP(mdv, md32, md_file);
		CP(mdv, md32, md_mediasize);
		CP(mdv, md32, md_sectorsize);
		CP(mdv, md32, md_options);
		CP(mdv, md32, md_base);
		CP(mdv, md32, md_fwheads);
		CP(mdv, md32, md_fwsectors);
		if (com == MDIOCLIST) {
			/*
			 * Use MDNPAD, and not MDNPAD32.  Padding is
			 * allocated and used by compat32 ABI.
			 */
			for (i = 0; i < MDNPAD; i++)
				CP(mdv, md32, md_pad[i]);
		}
		error = copyout(&md32, uap->data, sizeof(md32));
	}
	return error;
}


static int
freebsd32_ioctl_ioc_toc_header(struct thread *td,
    struct freebsd32_ioctl_args *uap, struct file *fp)
{
	struct ioc_toc_header toch;
	struct ioc_toc_header32 toch32;
	int error;

	if ((error = copyin(uap->data, &toch32, sizeof(toch32))))
		return (error);
	CP(toch32, toch, len);
	CP(toch32, toch, starting_track);
	CP(toch32, toch, ending_track);
	error = fo_ioctl(fp, CDIOREADTOCHEADER, (caddr_t)&toch,
	    td->td_ucred, td);
	return (error);
}


static int
freebsd32_ioctl_ioc_read_toc(struct thread *td,
    struct freebsd32_ioctl_args *uap, struct file *fp)
{
	struct ioc_read_toc_entry toce;
	struct ioc_read_toc_entry32 toce32;
	int error;

	if ((error = copyin(uap->data, &toce32, sizeof(toce32))))
		return (error);
	CP(toce32, toce, address_format);
	CP(toce32, toce, starting_track);
	CP(toce32, toce, data_len);
	PTRIN_CP(toce32, toce, data);

	if ((error = fo_ioctl(fp, CDIOREADTOCENTRYS, (caddr_t)&toce,
	    td->td_ucred, td))) {
		CP(toce, toce32, address_format);
		CP(toce, toce32, starting_track);
		CP(toce, toce32, data_len);
		PTROUT_CP(toce, toce32, data);
		error = copyout(&toce32, uap->data, sizeof(toce32));
	}
	return error;
}

static int
freebsd32_ioctl_fiodgname(struct thread *td,
    struct freebsd32_ioctl_args *uap, struct file *fp)
{
	struct fiodgname_arg fgn;
	struct fiodgname_arg32 fgn32;
	int error;

	if ((error = copyin(uap->data, &fgn32, sizeof fgn32)) != 0)
		return (error);
	CP(fgn32, fgn, len);
	PTRIN_CP(fgn32, fgn, buf);
	error = fo_ioctl(fp, FIODGNAME, (caddr_t)&fgn, td->td_ucred, td);
	return (error);
}

static int
freebsd32_ioctl_memrange(struct thread *td,
    struct freebsd32_ioctl_args *uap, struct file *fp)
{
	struct mem_range_op mro;
	struct mem_range_op32 mro32;
	int error;
	u_long com;

	if ((error = copyin(uap->data, &mro32, sizeof(mro32))) != 0)
		return (error);

	PTRIN_CP(mro32, mro, mo_desc);
	CP(mro32, mro, mo_arg[0]);
	CP(mro32, mro, mo_arg[1]);

	com = 0;
	switch (uap->com) {
	case MEMRANGE_GET32:
		com = MEMRANGE_GET;
		break;

	case MEMRANGE_SET32:
		com = MEMRANGE_SET;
		break;

	default:
		panic("%s: unknown MEMRANGE %#x", __func__, uap->com);
	}

	if ((error = fo_ioctl(fp, com, (caddr_t)&mro, td->td_ucred, td)) != 0)
		return (error);

	if ( (com & IOC_OUT) ) {
		CP(mro, mro32, mo_arg[0]);
		CP(mro, mro32, mo_arg[1]);

		error = copyout(&mro32, uap->data, sizeof(mro32));
	}

	return (error);
}

static int
freebsd32_ioctl_pciocgetconf(struct thread *td,
    struct freebsd32_ioctl_args *uap, struct file *fp)
{
	struct pci_conf_io pci;
	struct pci_conf_io32 pci32;
	struct pci_match_conf32 pmc32;
	struct pci_match_conf32 *pmc32p;
	struct pci_match_conf pmc;
	struct pci_match_conf *pmcp;
	struct pci_conf32 pc32;
	struct pci_conf32 *pc32p;
	struct pci_conf pc;
	struct pci_conf *pcp;
	u_int32_t i;
	u_int32_t npat_to_convert;
	u_int32_t nmatch_to_convert;
	vm_offset_t addr;
	int error;

	if ((error = copyin(uap->data, &pci32, sizeof(pci32))) != 0)
		return (error);

	CP(pci32, pci, num_patterns);
	CP(pci32, pci, offset);
	CP(pci32, pci, generation);

	npat_to_convert = pci32.pat_buf_len / sizeof(struct pci_match_conf32);
	pci.pat_buf_len = npat_to_convert * sizeof(struct pci_match_conf);
	pci.patterns = NULL;
	nmatch_to_convert = pci32.match_buf_len / sizeof(struct pci_conf32);
	pci.match_buf_len = nmatch_to_convert * sizeof(struct pci_conf);
	pci.matches = NULL;

	if ((error = copyout_map(td, &addr, pci.pat_buf_len)) != 0)
		goto cleanup;
	pci.patterns = (struct pci_match_conf *)addr;
	if ((error = copyout_map(td, &addr, pci.match_buf_len)) != 0)
		goto cleanup;
	pci.matches = (struct pci_conf *)addr;

	npat_to_convert = min(npat_to_convert, pci.num_patterns);

	for (i = 0, pmc32p = (struct pci_match_conf32 *)PTRIN(pci32.patterns),
	     pmcp = pci.patterns;
	     i < npat_to_convert; i++, pmc32p++, pmcp++) {
		if ((error = copyin(pmc32p, &pmc32, sizeof(pmc32))) != 0)
			goto cleanup;
		CP(pmc32,pmc,pc_sel);
		strlcpy(pmc.pd_name, pmc32.pd_name, sizeof(pmc.pd_name));
		CP(pmc32,pmc,pd_unit);
		CP(pmc32,pmc,pc_vendor);
		CP(pmc32,pmc,pc_device);
		CP(pmc32,pmc,pc_class);
		CP(pmc32,pmc,flags);
		if ((error = copyout(&pmc, pmcp, sizeof(pmc))) != 0)
			goto cleanup;
	}

	if ((error = fo_ioctl(fp, PCIOCGETCONF, (caddr_t)&pci,
			      td->td_ucred, td)) != 0)
		goto cleanup;

	nmatch_to_convert = min(nmatch_to_convert, pci.num_matches);

	for (i = 0, pcp = pci.matches,
	     pc32p = (struct pci_conf32 *)PTRIN(pci32.matches);
	     i < nmatch_to_convert; i++, pcp++, pc32p++) {
		if ((error = copyin(pcp, &pc, sizeof(pc))) != 0)
			goto cleanup;
		CP(pc,pc32,pc_sel);
		CP(pc,pc32,pc_hdr);
		CP(pc,pc32,pc_subvendor);
		CP(pc,pc32,pc_subdevice);
		CP(pc,pc32,pc_vendor);
		CP(pc,pc32,pc_device);
		CP(pc,pc32,pc_class);
		CP(pc,pc32,pc_subclass);
		CP(pc,pc32,pc_progif);
		CP(pc,pc32,pc_revid);
		strlcpy(pc32.pd_name, pc.pd_name, sizeof(pc32.pd_name));
		CP(pc,pc32,pd_unit);
		if ((error = copyout(&pc32, pc32p, sizeof(pc32))) != 0)
			goto cleanup;
	}

	CP(pci, pci32, num_matches);
	CP(pci, pci32, offset);
	CP(pci, pci32, generation);
	CP(pci, pci32, status);

	error = copyout(&pci32, uap->data, sizeof(pci32));

cleanup:
	if (pci.patterns)
		copyout_unmap(td, (vm_offset_t)pci.patterns, pci.pat_buf_len);
	if (pci.matches)
		copyout_unmap(td, (vm_offset_t)pci.matches, pci.match_buf_len);

	return (error);
}

int
freebsd32_ioctl(struct thread *td, struct freebsd32_ioctl_args *uap)
{
	struct ioctl_args ap /*{
		int	fd;
		u_long	com;
		caddr_t	data;
	}*/ ;
	struct file *fp;
	cap_rights_t rights;
	int error;

	error = fget(td, uap->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
	if (error != 0)
		return (error);
	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
		fdrop(fp, td);
		return (EBADF);
	}

	switch (uap->com) {
	case MDIOCATTACH_32:	/* FALLTHROUGH */
	case MDIOCDETACH_32:	/* FALLTHROUGH */
	case MDIOCQUERY_32:	/* FALLTHROUGH */
	case MDIOCLIST_32:
		error = freebsd32_ioctl_md(td, uap, fp);
		break;

	case CDIOREADTOCENTRYS_32:
		error = freebsd32_ioctl_ioc_read_toc(td, uap, fp);
		break;

	case CDIOREADTOCHEADER_32:
		error = freebsd32_ioctl_ioc_toc_header(td, uap, fp);
		break;

	case FIODGNAME_32:
		error = freebsd32_ioctl_fiodgname(td, uap, fp);
		break;

	case MEMRANGE_GET32:	/* FALLTHROUGH */
	case MEMRANGE_SET32:
		error = freebsd32_ioctl_memrange(td, uap, fp);
		break;

	case PCIOCGETCONF_32:
		error = freebsd32_ioctl_pciocgetconf(td, uap, fp);
		break;

	default:
		fdrop(fp, td);
		ap.fd = uap->fd;
		ap.com = uap->com;
		PTRIN_CP(*uap, ap, data);
		return sys_ioctl(td, &ap);
	}

	fdrop(fp, td);
	return error;
}