/* $NetBSD: linux32_ipccall.c,v 1.12 2019/02/21 03:37:18 mrg Exp $ */

/* $NetBSD: linux32_ipccall.c,v 1.12 2019/02/21 03:37:18 mrg Exp $ */

/*
* Copyright (c) 2008 Nicolas Joly
* 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.
*
* 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: linux32_ipccall.c,v 1.12 2019/02/21 03:37:18 mrg Exp $");

#if defined(_KERNEL_OPT)
#include "opt_sysv.h"
#endif

#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>

#include <sys/syscallargs.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>

#include <compat/linux/common/linux_types.h>
#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/linux32_syscallargs.h>
#include <compat/linux32/common/linux32_ipc.h>
#include <compat/linux32/common/linux32_sem.h>
#include <compat/linux32/common/linux32_shm.h>

#define LINUX32_IPC_semop 1
#define LINUX32_IPC_semget 2
#define LINUX32_IPC_semctl 3
#define LINUX32_IPC_msgsnd 11
#define LINUX32_IPC_msgrcv 12
#define LINUX32_IPC_msgget 13
#define LINUX32_IPC_msgctl 14
#define LINUX32_IPC_shmat 21
#define LINUX32_IPC_shmdt 22
#define LINUX32_IPC_shmget 23
#define LINUX32_IPC_shmctl 24

#ifdef SYSVSEM
static void
bsd_to_linux32_semid_ds(struct semid_ds *, struct linux32_semid_ds *);
static void
bsd_to_linux32_semid64_ds(struct semid_ds *, struct linux32_semid64_ds *);
static void
linux32_to_bsd_semid_ds(struct linux32_semid_ds *, struct semid_ds *);
static void
linux32_to_bsd_semid64_ds(struct linux32_semid64_ds *, struct semid_ds *);

static int
linux32_semop(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
static int
linux32_semget(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
static int
linux32_semctl(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
#endif /* SYSVSEM */

#ifdef SYSVSHM
static void
bsd_to_linux32_shmid_ds(struct shmid_ds *, struct linux32_shmid_ds *);
static void
linux32_to_bsd_shmid_ds(struct linux32_shmid_ds *, struct shmid_ds *);
static void
bsd_to_linux32_shmid64_ds(struct shmid_ds *, struct linux32_shmid64_ds *);
static void
linux32_to_bsd_shmid64_ds(struct linux32_shmid64_ds *, struct shmid_ds *);

static int
linux32_shmat(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
static int
linux32_shmdt(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
static int
linux32_shmget(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
static int
linux32_shmctl(struct lwp *, const struct linux32_sys_ipc_args *, register_t *);
#endif /* SYSVSHM */

#ifdef SYSVMSG
static int linux32_msgsnd(struct lwp *, const struct linux32_sys_ipc_args *,
register_t *);
static int linux32_msgrcv(struct lwp *, const struct linux32_sys_ipc_args *,
register_t *);
static int linux32_msgget(struct lwp *, const struct linux32_sys_ipc_args *,
register_t *);
static int linux32_msgctl(struct lwp *, const struct linux32_sys_ipc_args *,
register_t *);
#endif

int
linux32_sys_ipc(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(int) a1;
syscallarg(int) a2;
syscallarg(int) a3;
syscallarg(netbsd32_voidp) ptr;
} */

switch (SCARG(uap, what)) {
#ifdef SYSVSEM
case LINUX32_IPC_semop:
return linux32_semop(l, uap, retval);
case LINUX32_IPC_semget:
return linux32_semget(l, uap, retval);
case LINUX32_IPC_semctl:
return linux32_semctl(l, uap, retval);
#endif /* SYSVSEM */
#ifdef SYSVMSG
case LINUX32_IPC_msgsnd:
return linux32_msgsnd(l, uap, retval);
case LINUX32_IPC_msgrcv:
return linux32_msgrcv(l, uap, retval);
case LINUX32_IPC_msgget:
return linux32_msgget(l, uap, retval);
case LINUX32_IPC_msgctl:
return linux32_msgctl(l, uap, retval);
#endif
#ifdef SYSVSHM
case LINUX32_IPC_shmat:
return linux32_shmat(l, uap, retval);
case LINUX32_IPC_shmdt:
return linux32_shmdt(l, uap, retval);
case LINUX32_IPC_shmget:
return linux32_shmget(l, uap, retval);
case LINUX32_IPC_shmctl:
return linux32_shmctl(l, uap, retval);
#endif /* SYSVSHM */
default:
return ENOSYS;
}
}

#if defined(SYSVSEM) || defined (SYSVMSG) || defined(SYSVSHM)
static void
bsd_to_linux32_ipc_perm(struct ipc_perm *bpp, struct linux32_ipc_perm *lpp)
{

memset(lpp, 0, sizeof *lpp);
lpp->l_key = bpp->_key;
lpp->l_uid = bpp->uid;
lpp->l_gid = bpp->gid;
lpp->l_cuid = bpp->cuid;
lpp->l_cgid = bpp->cgid;
lpp->l_mode = bpp->mode;
lpp->l_seq = bpp->_seq;
}

static void
linux32_to_bsd_ipc_perm(struct linux32_ipc_perm *lpp, struct ipc_perm *bpp)
{

bpp->_key = lpp->l_key;
bpp->uid = lpp->l_uid;
bpp->gid = lpp->l_gid;
bpp->cuid = lpp->l_cuid;
bpp->cgid = lpp->l_cgid;
bpp->mode = lpp->l_mode;
bpp->_seq = lpp->l_seq;
}

static void
bsd_to_linux32_ipc64_perm(struct ipc_perm *bpp, struct linux32_ipc64_perm *lpp)
{

memset(lpp, 0, sizeof *lpp);
lpp->l_key = bpp->_key;
lpp->l_uid = bpp->uid;
lpp->l_gid = bpp->gid;
lpp->l_cuid = bpp->cuid;
lpp->l_cgid = bpp->cgid;
lpp->l_mode = bpp->mode;
lpp->l_seq = bpp->_seq;
}

static void
linux32_to_bsd_ipc64_perm(struct linux32_ipc64_perm *lpp, struct ipc_perm *bpp)
{

bpp->_key = lpp->l_key;
bpp->uid = lpp->l_uid;
bpp->gid = lpp->l_gid;
bpp->cuid = lpp->l_cuid;
bpp->cgid = lpp->l_cgid;
bpp->mode = lpp->l_mode;
bpp->_seq = lpp->l_seq;
}
#endif /* SYSVSEM, SYSVMSG, or SYSVSHM */

#ifdef SYSVSEM
static void
bsd_to_linux32_semid_ds(struct semid_ds *bsp, struct linux32_semid_ds *lsp)
{

memset(lsp, 0, sizeof *lsp);
bsd_to_linux32_ipc_perm(&bsp->sem_perm, &lsp->l_sem_perm);
lsp->l_sem_otime = bsp->sem_otime;
lsp->l_sem_ctime = bsp->sem_ctime;
lsp->l_sem_nsems = bsp->sem_nsems;
}

static void
bsd_to_linux32_semid64_ds(struct semid_ds *bsp, struct linux32_semid64_ds *lsp)
{

memset(lsp, 0, sizeof *lsp);
bsd_to_linux32_ipc64_perm(&bsp->sem_perm, &lsp->l_sem_perm);
lsp->l_sem_otime = bsp->sem_otime;
lsp->l_sem_ctime = bsp->sem_ctime;
lsp->l_sem_nsems = bsp->sem_nsems;
}

static void
linux32_to_bsd_semid_ds(struct linux32_semid_ds *lsp, struct semid_ds *bsp)
{
linux32_to_bsd_ipc_perm(&lsp->l_sem_perm, &bsp->sem_perm);
bsp->sem_otime = lsp->l_sem_otime;
bsp->sem_ctime = lsp->l_sem_ctime;
bsp->sem_nsems = lsp->l_sem_nsems;
}

static void
linux32_to_bsd_semid64_ds(struct linux32_semid64_ds *lsp, struct semid_ds *bsp)
{
linux32_to_bsd_ipc64_perm(&lsp->l_sem_perm, &bsp->sem_perm);
bsp->sem_otime = lsp->l_sem_otime;
bsp->sem_ctime = lsp->l_sem_ctime;
bsp->sem_nsems = lsp->l_sem_nsems;
}

static int
linux32_semop(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
struct sys_semop_args ua;

SCARG(&ua, semid) = SCARG(uap, a1);
SCARG(&ua, sops) = SCARG_P32(uap, ptr);
SCARG(&ua, nsops) = SCARG(uap, a2);

return sys_semop(l, &ua, retval);
}

static int
linux32_semget(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
struct sys_semget_args ua;

SCARG(&ua, key) = SCARG(uap, a1);
SCARG(&ua, nsems) = SCARG(uap, a2);
SCARG(&ua, semflg) = SCARG(uap, a3);

return sys_semget(l, &ua, retval);
}

static int
linux32_semctl(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
int lcmd, cmd, error;
struct semid_ds bs;
struct linux32_semid_ds ls;
struct linux32_semid64_ds ls64;
union linux32_semun lsem;
union __semun bsem;
void *buf = NULL;

if ((error = copyin(SCARG_P32(uap, ptr), &lsem, sizeof lsem)))
return error;

lcmd = SCARG(uap, a3);

switch (lcmd & ~LINUX32_IPC_64) {
case LINUX32_IPC_RMID:
cmd = IPC_RMID;
break;
case LINUX32_IPC_STAT:
cmd = IPC_STAT;
buf = &bs;
break;
case LINUX32_IPC_SET:
if (lcmd & LINUX32_IPC_64) {
error = copyin(NETBSD32PTR64(lsem.l_buf), &ls64,
sizeof ls64);
linux32_to_bsd_semid64_ds(&ls64, &bs);
} else {
error = copyin(NETBSD32PTR64(lsem.l_buf), &ls,
sizeof ls);
linux32_to_bsd_semid_ds(&ls, &bs);
}
if (error)
return error;
cmd = IPC_SET;
buf = &bs;
break;
case LINUX32_GETVAL:
cmd = GETVAL;
break;
case LINUX32_SETVAL:
cmd = SETVAL;
bsem.val = lsem.l_val;
buf = &bsem;
break;
case LINUX32_GETPID:
cmd = GETPID;
break;
case LINUX32_GETNCNT:
cmd = GETNCNT;
break;
case LINUX32_GETZCNT:
cmd = GETZCNT;
break;
case LINUX32_GETALL:
cmd = GETALL;
bsem.array = NETBSD32PTR64(lsem.l_array);
buf = &bsem;
break;
case LINUX32_SETALL:
cmd = SETALL;
bsem.array = NETBSD32PTR64(lsem.l_array);
buf = &bsem;
break;
default:
return EINVAL;
}

error = semctl1(l, SCARG(uap, a1), SCARG(uap, a2), cmd, buf, retval);
if (error)
return error;

switch (lcmd) {
case LINUX32_IPC_STAT:
bsd_to_linux32_semid_ds(&bs, &ls);
error = copyout(&ls, NETBSD32PTR64(lsem.l_buf), sizeof ls);
break;
case LINUX32_IPC_STAT|LINUX32_IPC_64:
bsd_to_linux32_semid64_ds(&bs, &ls64);
error = copyout(&ls64, NETBSD32PTR64(lsem.l_buf), sizeof ls64);
break;
default:
break;
}

return error;
}
#endif /* SYSVSEM */

#ifdef SYSVMSG

static int
linux32_msgsnd(struct lwp *l, const struct linux32_sys_ipc_args *uap, register_t *retval)
{
struct netbsd32_msgsnd_args bma;

SCARG(&bma, msqid) = SCARG(uap, a1);
SCARG(&bma, msgp) = SCARG(uap, ptr);
SCARG(&bma, msgsz) = SCARG(uap, a2);
SCARG(&bma, msgflg) = SCARG(uap, a3);

return netbsd32_msgsnd(l, &bma, retval);
}

/*
* This kludge is used for the 6th argument to the msgrcv system
* call, to get around the maximum of 5 arguments to a syscall in Linux.
*/
struct linux32_msgrcv_msgarg {
netbsd32_pointer_t msg;
netbsd32_long type;
};

static int
linux32_msgrcv(struct lwp *l, const struct linux32_sys_ipc_args *uap, register_t *retval)
{
struct netbsd32_msgrcv_args bma;
struct linux32_msgrcv_msgarg kluge;
int error;

if ((error = copyin(SCARG_P32(uap, ptr), &kluge, sizeof kluge)))
return error;

SCARG(&bma, msqid) = SCARG(uap, a1);
SCARG(&bma, msgp) = kluge.msg;
SCARG(&bma, msgsz) = SCARG(uap, a2);
SCARG(&bma, msgtyp) = kluge.type;
SCARG(&bma, msgflg) = SCARG(uap, a3);

return netbsd32_msgrcv(l, &bma, retval);
}

static int
linux32_msgget(struct lwp *l, const struct linux32_sys_ipc_args *uap, register_t *retval)
{
struct sys_msgget_args bma;

SCARG(&bma, key) = (key_t)(linux32_key_t)SCARG(uap, a1);
SCARG(&bma, msgflg) = SCARG(uap, a2);

return sys_msgget(l, &bma, retval);
}

static void
linux32_to_bsd_msqid_ds(struct linux32_msqid_ds *lmp, struct msqid_ds *bmp)
{

memset(bmp, 0, sizeof(*bmp));
linux32_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm);
bmp->_msg_cbytes = lmp->l_msg_cbytes;
bmp->msg_qnum = lmp->l_msg_qnum;
bmp->msg_qbytes = lmp->l_msg_qbytes;
bmp->msg_lspid = lmp->l_msg_lspid;
bmp->msg_lrpid = lmp->l_msg_lrpid;
bmp->msg_stime = lmp->l_msg_stime;
bmp->msg_rtime = lmp->l_msg_rtime;
bmp->msg_ctime = lmp->l_msg_ctime;
}

static void
linux32_to_bsd_msqid64_ds(struct linux32_msqid64_ds *lmp, struct msqid_ds *bmp)
{

linux32_to_bsd_ipc64_perm(&lmp->l_msg_perm, &bmp->msg_perm);
bmp->_msg_cbytes = lmp->l_msg_cbytes;
bmp->msg_stime = lmp->l_msg_stime;
bmp->msg_rtime = lmp->l_msg_rtime;
bmp->msg_ctime = lmp->l_msg_ctime;
bmp->msg_qnum = lmp->l_msg_qnum;
bmp->msg_qbytes = lmp->l_msg_qbytes;
bmp->msg_lspid = lmp->l_msg_lspid;
bmp->msg_lrpid = lmp->l_msg_lrpid;
}

static void
bsd_to_linux32_msqid_ds(struct msqid_ds *bmp, struct linux32_msqid_ds *lmp)
{

memset(lmp, 0, sizeof(*lmp));
bsd_to_linux32_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm);
lmp->l_msg_cbytes = bmp->_msg_cbytes;
lmp->l_msg_qnum = bmp->msg_qnum;
lmp->l_msg_qbytes = bmp->msg_qbytes;
lmp->l_msg_lspid = bmp->msg_lspid;
lmp->l_msg_lrpid = bmp->msg_lrpid;
lmp->l_msg_stime = bmp->msg_stime;
lmp->l_msg_rtime = bmp->msg_rtime;
lmp->l_msg_ctime = bmp->msg_ctime;
}

static void
bsd_to_linux32_msqid64_ds(struct msqid_ds *bmp, struct linux32_msqid64_ds *lmp)
{

memset(lmp, 0, sizeof(*lmp));
bsd_to_linux32_ipc64_perm(&bmp->msg_perm, &lmp->l_msg_perm);
lmp->l_msg_cbytes = bmp->_msg_cbytes;
lmp->l_msg_stime = bmp->msg_stime;
lmp->l_msg_rtime = bmp->msg_rtime;
lmp->l_msg_ctime = bmp->msg_ctime;
lmp->l_msg_qnum = bmp->msg_qnum;
lmp->l_msg_qbytes = bmp->msg_qbytes;
lmp->l_msg_lspid = bmp->msg_lspid;
lmp->l_msg_lrpid = bmp->msg_lrpid;
}

static int
linux32_msgctl(struct lwp *l, const struct linux32_sys_ipc_args *uap, register_t *retval)
{
struct msqid_ds bm, *bmp = NULL;
struct linux32_msqid_ds lm;
struct linux32_msqid64_ds lm64;
int cmd, lcmd, error;
void *data = SCARG_P32(uap, ptr);

lcmd = SCARG(uap, a2);

switch (lcmd & ~LINUX32_IPC_64) {
case LINUX32_IPC_STAT:
cmd = IPC_STAT;
bmp = &bm;
break;
case LINUX32_IPC_SET:
if (lcmd & LINUX32_IPC_64) {
error = copyin(data, &lm64, sizeof lm64);
linux32_to_bsd_msqid64_ds(&lm64, &bm);
} else {
error = copyin(data, &lm, sizeof lm);
linux32_to_bsd_msqid_ds(&lm, &bm);
}
if (error)
return error;
cmd = IPC_SET;
bmp = &bm;
break;
case LINUX32_IPC_RMID:
cmd = IPC_RMID;
break;
default:
return EINVAL;
}

if ((error = msgctl1(l, SCARG(uap, a1), cmd, bmp)))
return error;

switch (lcmd) {
case LINUX32_IPC_STAT:
bsd_to_linux32_msqid_ds(&bm, &lm);
error = copyout(&lm, data, sizeof lm);
break;
case LINUX32_IPC_STAT|LINUX32_IPC_64:
bsd_to_linux32_msqid64_ds(&bm, &lm64);
error = copyout(&lm64, data, sizeof lm64);
break;
default:
break;
}

return error;
}
#endif /* SYSVMSG */

#ifdef SYSVSHM
static void
bsd_to_linux32_shmid_ds(struct shmid_ds *bsp, struct linux32_shmid_ds *lsp)
{

memset(lsp, 0, sizeof *lsp);
bsd_to_linux32_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm);
lsp->l_shm_segsz = bsp->shm_segsz;
lsp->l_shm_atime = bsp->shm_atime;
lsp->l_shm_dtime = bsp->shm_dtime;
lsp->l_shm_ctime = bsp->shm_ctime;
lsp->l_shm_cpid = bsp->shm_cpid;
lsp->l_shm_lpid = bsp->shm_lpid;
lsp->l_shm_nattch = bsp->shm_nattch;
}

static void
linux32_to_bsd_shmid_ds(struct linux32_shmid_ds *lsp, struct shmid_ds *bsp)
{

linux32_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm);
bsp->shm_segsz = lsp->l_shm_segsz;
bsp->shm_atime = lsp->l_shm_atime;
bsp->shm_dtime = lsp->l_shm_dtime;
bsp->shm_ctime = lsp->l_shm_ctime;
bsp->shm_cpid = lsp->l_shm_cpid;
bsp->shm_lpid = lsp->l_shm_lpid;
bsp->shm_nattch = lsp->l_shm_nattch;
}

static void
bsd_to_linux32_shmid64_ds(struct shmid_ds *bsp, struct linux32_shmid64_ds *lsp)
{

memset(lsp, 0, sizeof *lsp);
bsd_to_linux32_ipc64_perm(&bsp->shm_perm, &lsp->l_shm_perm);
lsp->l_shm_segsz = bsp->shm_segsz;
lsp->l_shm_atime = bsp->shm_atime;
lsp->l_shm_dtime = bsp->shm_dtime;
lsp->l_shm_ctime = bsp->shm_ctime;
lsp->l_shm_cpid = bsp->shm_cpid;
lsp->l_shm_lpid = bsp->shm_lpid;
lsp->l_shm_nattch = bsp->shm_nattch;
}

static void
linux32_to_bsd_shmid64_ds(struct linux32_shmid64_ds *lsp, struct shmid_ds *bsp)
{

linux32_to_bsd_ipc64_perm(&lsp->l_shm_perm, &bsp->shm_perm);
bsp->shm_segsz = lsp->l_shm_segsz;
bsp->shm_atime = lsp->l_shm_atime;
bsp->shm_dtime = lsp->l_shm_dtime;
bsp->shm_ctime = lsp->l_shm_ctime;
bsp->shm_cpid = lsp->l_shm_cpid;
bsp->shm_lpid = lsp->l_shm_lpid;
bsp->shm_nattch = lsp->l_shm_nattch;
}

static int
linux32_shmat(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
struct sys_shmat_args ua;
netbsd32_pointer_t addr32;
int error;

SCARG(&ua, shmid) = SCARG(uap, a1);
SCARG(&ua, shmaddr) = SCARG_P32(uap, ptr);
SCARG(&ua, shmflg) = SCARG(uap, a2);

if ((error = sys_shmat(l, &ua, retval)))
return error;

NETBSD32PTR32(addr32, (const void *)(uintptr_t)retval[0]);

error = copyout(&addr32, NETBSD32IPTR64(SCARG(uap, a3)), sizeof addr32);
if (error == 0)
retval[0] = 0;

return error;
}

static int
linux32_shmdt(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
struct sys_shmdt_args ua;

SCARG(&ua, shmaddr) = SCARG_P32(uap, ptr);

return sys_shmdt(l, &ua, retval);
}

static int
linux32_shmget(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
struct sys_shmget_args ua;

SCARG(&ua, key) = SCARG(uap, a1);
SCARG(&ua, size) = SCARG(uap, a2);
SCARG(&ua, shmflg) = SCARG(uap, a3) | _SHM_RMLINGER;

return sys_shmget(l, &ua, retval);
}

static int
linux32_shmctl(struct lwp *l, const struct linux32_sys_ipc_args *uap,
register_t *retval)
{
int shmid, cmd, error;
struct shmid_ds bs;
struct linux32_shmid_ds ls;
struct linux32_shmid64_ds ls64;

shmid = SCARG(uap, a1);
cmd = SCARG(uap, a2);

switch (cmd & ~LINUX32_IPC_64) {

case LINUX32_SHM_STAT:
return ENOSYS;

case LINUX32_IPC_STAT:
error = shmctl1(l, shmid, IPC_STAT, &bs);
if (error != 0)
return error;
if (cmd & LINUX32_IPC_64) {
bsd_to_linux32_shmid64_ds(&bs, &ls64);
error = copyout(&ls64, SCARG_P32(uap, ptr), sizeof ls64);
} else {
bsd_to_linux32_shmid_ds(&bs, &ls);
error = copyout(&ls, SCARG_P32(uap, ptr), sizeof ls);
}
return error;

case LINUX32_IPC_SET:
if (cmd & LINUX32_IPC_64) {
error = copyin(SCARG_P32(uap, ptr), &ls64, sizeof ls64);
linux32_to_bsd_shmid64_ds(&ls64, &bs);
} else {
error = copyin(SCARG_P32(uap, ptr), &ls, sizeof ls);
linux32_to_bsd_shmid_ds(&ls, &bs);
}
if (error != 0)
return error;
return shmctl1(l, shmid, IPC_SET, &bs);

case LINUX32_IPC_RMID:
return shmctl1(l, shmid, IPC_RMID, NULL);

case LINUX32_SHM_LOCK:
return shmctl1(l, shmid, SHM_LOCK, NULL);

case LINUX32_SHM_UNLOCK:
return shmctl1(l, shmid, SHM_UNLOCK, NULL);

case LINUX32_IPC_INFO:
case LINUX32_SHM_INFO:
return ENOSYS;

default:
return EINVAL;
}
}
#endif /* SYSVSHM */