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NetBSD/sys/compat/linux/common/linux_ipc.c

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/* $NetBSD: linux_ipc.c,v 1.19 1999/01/03 05:18:01 erh Exp $ */
/*-
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 "opt_sysv.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux/linux_syscall.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_msg.h>
#include <compat/linux/common/linux_shm.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/common/linux_ipccall.h>
/*
* Note: Not all linux architechtures have explicit versions
* of the SYSV* syscalls. On the ones that don't
* we pretend that they are defined anyway. *_args and
* prototypes are defined in individual headers;
* syscalls.master lists those syscalls as NOARGS.
*
* The functions in multiarch are the ones that just need
* the arguments shuffled around and then use the
* normal NetBSD syscall.
*
* Function in multiarch:
* linux_sys_ipc : linux_ipccall.c
* liunx_semop : linux_ipccall.c
* linux_semget : linux_ipccall.c
* linux_msgsnd : linux_ipccall.c
* linux_msgrcv : linux_ipccall.c
* linux_msgget : linux_ipccall.c
* linux_shmdt : linux_ipccall.c
* linux_shmget : linux_ipccall.c
*/
#if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
/*
* Convert between Linux and NetBSD ipc_perm structures. Only the
* order of the fields is different.
*/
void
linux_to_bsd_ipc_perm(lpp, bpp)
struct linux_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;
}
void
bsd_to_linux_ipc_perm(bpp, lpp)
struct ipc_perm *bpp;
struct linux_ipc_perm *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;
}
#endif
#ifdef SYSVSEM
/*
* Semaphore operations. Most constants and structures are the same on
* both systems. Only semctl() needs some extra work.
*/
/*
* Convert between Linux and NetBSD semid_ds structures.
*/
void
bsd_to_linux_semid_ds(bs, ls)
struct semid_ds *bs;
struct linux_semid_ds *ls;
{
bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm);
ls->l_sem_otime = bs->sem_otime;
ls->l_sem_ctime = bs->sem_ctime;
ls->l_sem_nsems = bs->sem_nsems;
ls->l_sem_base = bs->sem_base;
}
void
linux_to_bsd_semid_ds(ls, bs)
struct linux_semid_ds *ls;
struct semid_ds *bs;
{
linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm);
bs->sem_otime = ls->l_sem_otime;
bs->sem_ctime = ls->l_sem_ctime;
bs->sem_nsems = ls->l_sem_nsems;
bs->sem_base = ls->l_sem_base;
}
/*
* Most of this can be handled by directly passing the arguments on,
* but IPC_* require a lot of copy{in,out} because of the extra indirection
* (we need to pass a pointer to a union cointaining a pointer to a semid_ds
* structure. Linux actually handles this better than we do.)
*/
int
linux_sys_semctl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_semctl_args /* {
syscallarg(int) semid;
syscallarg(int) semnum;
syscallarg(int) cmd;
syscallarg(union linux_semun) arg;
} */ *uap = v;
caddr_t sg;
struct sys___semctl_args nua;
struct semid_ds *bmp, bm;
struct linux_semid_ds lm;
union semun *bup;
int error;
SCARG(&nua, semid) = SCARG(uap, semid);
SCARG(&nua, semnum) = SCARG(uap, semnum);
switch (SCARG(uap, cmd)) {
case LINUX_IPC_STAT:
sg = stackgap_init(p->p_emul);
bup = stackgap_alloc(&sg, sizeof (union semun));
bmp = stackgap_alloc(&sg, sizeof (struct semid_ds));
if ((error = copyout(&bmp, bup, sizeof bmp)))
return error;
SCARG(&nua, cmd) = IPC_STAT;
SCARG(&nua, arg) = bup;
if ((error = sys___semctl(p, &nua, retval)))
return error;
if ((error = copyin(bmp, &bm, sizeof bm)))
return error;
bsd_to_linux_semid_ds(&bm, &lm);
return copyout(&lm, SCARG(uap, arg).l_buf, sizeof lm);
case LINUX_IPC_SET:
if ((error = copyin(SCARG(uap, arg).l_buf, &lm, sizeof lm)))
return error;
linux_to_bsd_semid_ds(&lm, &bm);
sg = stackgap_init(p->p_emul);
bup = stackgap_alloc(&sg, sizeof (union semun));
bmp = stackgap_alloc(&sg, sizeof (struct semid_ds));
if ((error = copyout(&bm, bmp, sizeof bm)))
return error;
if ((error = copyout(&bmp, bup, sizeof bmp)))
return error;
SCARG(&nua, cmd) = IPC_SET;
SCARG(&nua, arg) = bup;
break;
case LINUX_IPC_RMID:
SCARG(&nua, cmd) = IPC_RMID;
break;
case LINUX_GETVAL:
SCARG(&nua, cmd) = GETVAL;
break;
case LINUX_GETPID:
SCARG(&nua, cmd) = GETPID;
break;
case LINUX_GETNCNT:
SCARG(&nua, cmd) = GETNCNT;
break;
case LINUX_GETZCNT:
SCARG(&nua, cmd) = GETZCNT;
break;
case LINUX_SETVAL:
SCARG(&nua, cmd) = SETVAL;
break;
default:
return EINVAL;
}
return sys___semctl(p, &nua, retval);
}
#endif /* SYSVSEM */
#ifdef SYSVMSG
void
linux_to_bsd_msqid_ds(lmp, bmp)
struct linux_msqid_ds *lmp;
struct msqid_ds *bmp;
{
linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm);
bmp->msg_first = lmp->l_msg_first;
bmp->msg_last = lmp->l_msg_last;
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;
}
void
bsd_to_linux_msqid_ds(bmp, lmp)
struct msqid_ds *bmp;
struct linux_msqid_ds *lmp;
{
bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm);
lmp->l_msg_first = bmp->msg_first;
lmp->l_msg_last = bmp->msg_last;
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;
}
int
linux_sys_msgctl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_msgctl_args /* {
syscallarg(int) msqid;
syscallarg(int) cmd;
syscallarg(struct linux_msqid_ds *) buf;
} */ *uap = v;
caddr_t sg;
struct sys_msgctl_args nua;
struct msqid_ds *bmp, bm;
struct linux_msqid_ds lm;
int error;
SCARG(&nua, msqid) = SCARG(uap, msqid);
switch (SCARG(uap, cmd)) {
case LINUX_IPC_STAT:
sg = stackgap_init(p->p_emul);
bmp = stackgap_alloc(&sg, sizeof (struct msqid_ds));
SCARG(&nua, cmd) = IPC_STAT;
SCARG(&nua, buf) = bmp;
if ((error = sys_msgctl(p, &nua, retval)))
return error;
if ((error = copyin(bmp, &bm, sizeof bm)))
return error;
bsd_to_linux_msqid_ds(&bm, &lm);
return copyout(&lm, SCARG(uap, buf), sizeof lm);
case LINUX_IPC_SET:
if ((error = copyin(SCARG(uap, buf), &lm, sizeof lm)))
return error;
linux_to_bsd_msqid_ds(&lm, &bm);
sg = stackgap_init(p->p_emul);
bmp = stackgap_alloc(&sg, sizeof bm);
if ((error = copyout(&bm, bmp, sizeof bm)))
return error;
SCARG(&nua, cmd) = IPC_SET;
SCARG(&nua, buf) = bmp;
break;
case LINUX_IPC_RMID:
SCARG(&nua, cmd) = IPC_RMID;
SCARG(&nua, buf) = NULL;
break;
default:
return EINVAL;
}
return sys_msgctl(p, &nua, retval);
}
#endif /* SYSVMSG */
#ifdef SYSVSHM
/*
* shmat(2). Very straightforward, except that Linux passes a pointer
* in which the return value is to be passed. This is subsequently
* handled by libc, apparently.
*/
int
linux_sys_shmat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_shmat_args /* {
syscallarg(int) shmid;
syscallarg(void *) shmaddr;
syscallarg(int) shmflg;
syscallarg(u_long *) raddr;
} */ *uap = v;
int error;
if ((error = sys_shmat(p, uap, retval)))
return error;
if ((error = copyout(&retval[0], (caddr_t) SCARG(uap, raddr),
sizeof retval[0])))
return error;
retval[0] = 0;
return 0;
}
/*
* Convert between Linux and NetBSD shmid_ds structures.
* The order of the fields is once again the difference, and
* we also need a place to store the internal data pointer
* in, which is unfortunately stored in this structure.
*
* We abuse a Linux internal field for that.
*/
void
linux_to_bsd_shmid_ds(lsp, bsp)
struct linux_shmid_ds *lsp;
struct shmid_ds *bsp;
{
linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm);
bsp->shm_segsz = lsp->l_shm_segsz;
bsp->shm_lpid = lsp->l_shm_lpid;
bsp->shm_cpid = lsp->l_shm_cpid;
bsp->shm_nattch = lsp->l_shm_nattch;
bsp->shm_atime = lsp->l_shm_atime;
bsp->shm_dtime = lsp->l_shm_dtime;
bsp->shm_ctime = lsp->l_shm_ctime;
bsp->shm_internal = lsp->l_private2; /* XXX Oh well. */
}
void
bsd_to_linux_shmid_ds(bsp, lsp)
struct shmid_ds *bsp;
struct linux_shmid_ds *lsp;
{
bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm);
lsp->l_shm_segsz = bsp->shm_segsz;
lsp->l_shm_lpid = bsp->shm_lpid;
lsp->l_shm_cpid = bsp->shm_cpid;
lsp->l_shm_nattch = bsp->shm_nattch;
lsp->l_shm_atime = bsp->shm_atime;
lsp->l_shm_dtime = bsp->shm_dtime;
lsp->l_shm_ctime = bsp->shm_ctime;
lsp->l_private2 = bsp->shm_internal; /* XXX */
}
/*
* shmctl. Not implemented (for now): IPC_INFO, SHM_INFO, SHM_STAT
* SHM_LOCK and SHM_UNLOCK are passed on, but currently not implemented
* by NetBSD itself.
*
* The usual structure conversion and massaging is done.
*/
int
linux_sys_shmctl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_shmctl_args /* {
syscallarg(int) shmid;
syscallarg(int) cmd;
syscallarg(struct linux_shmid_ds *) buf;
} */ *uap = v;
caddr_t sg;
struct sys_shmctl_args nua;
struct shmid_ds *bsp, bs;
struct linux_shmid_ds ls;
int error;
SCARG(&nua, shmid) = SCARG(uap, shmid);
switch (SCARG(uap, cmd)) {
case LINUX_IPC_STAT:
sg = stackgap_init(p->p_emul);
bsp = stackgap_alloc(&sg, sizeof(struct shmid_ds));
SCARG(&nua, cmd) = IPC_STAT;
SCARG(&nua, buf) = bsp;
if ((error = sys_shmctl(p, &nua, retval)))
return error;
if ((error = copyin(SCARG(&nua, buf), &bs, sizeof bs)))
return error;
bsd_to_linux_shmid_ds(&bs, &ls);
return copyout(&ls, SCARG(uap, buf), sizeof ls);
case LINUX_IPC_SET:
if ((error = copyin(SCARG(uap, buf), &ls, sizeof ls)))
return error;
linux_to_bsd_shmid_ds(&ls, &bs);
sg = stackgap_init(p->p_emul);
bsp = stackgap_alloc(&sg, sizeof bs);
if ((error = copyout(&bs, bsp, sizeof bs)))
return error;
SCARG(&nua, cmd) = IPC_SET;
SCARG(&nua, buf) = bsp;
break;
case LINUX_IPC_RMID:
SCARG(&nua, cmd) = IPC_RMID;
SCARG(&nua, buf) = NULL;
break;
case LINUX_SHM_LOCK:
SCARG(&nua, cmd) = SHM_LOCK;
SCARG(&nua, buf) = NULL;
break;
case LINUX_SHM_UNLOCK:
SCARG(&nua, cmd) = SHM_UNLOCK;
SCARG(&nua, buf) = NULL;
break;
case LINUX_IPC_INFO:
case LINUX_SHM_STAT:
case LINUX_SHM_INFO:
default:
return EINVAL;
}
return sys_shmctl(p, &nua, retval);
}
#endif /* SYSVSHM */
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