728 lines
19 KiB
C
728 lines
19 KiB
C
/* $NetBSD: linux_ipc.c,v 1.13 1998/01/22 16:33:57 mycroft Exp $ */
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/*
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* Copyright (c) 1995 Frank van der Linden
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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by Frank van der Linden
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/shm.h>
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#include <sys/sem.h>
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#include <sys/msg.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/time.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/systm.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <compat/linux/linux_types.h>
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#include <compat/linux/linux_signal.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/linux/linux_util.h>
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#include <compat/linux/linux_ipc.h>
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#include <compat/linux/linux_msg.h>
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#include <compat/linux/linux_shm.h>
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#include <compat/linux/linux_sem.h>
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#include <compat/linux/linux_ipccall.h>
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/*
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* Stuff to deal with the SysV ipc/shm/semaphore interface in Linux.
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* The main difference is, that Linux handles it all via one
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* system call, which has the usual maximum amount of 5 arguments.
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* This results in a kludge for calls that take 6 of them.
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*
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* The SYSVXXXX options have to be enabled to get the appropriate
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* functions to work.
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*/
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#ifdef SYSVSEM
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static int linux_semop __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_semget __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_semctl __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static void bsd_to_linux_semid_ds __P((struct semid_ds *,
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struct linux_semid_ds *));
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static void linux_to_bsd_semid_ds __P((struct linux_semid_ds *,
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struct semid_ds *));
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#endif
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#ifdef SYSVMSG
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static int linux_msgsnd __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_msgrcv __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_msgget __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_msgctl __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static void linux_to_bsd_msqid_ds __P((struct linux_msqid_ds *,
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struct msqid_ds *));
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static void bsd_to_linux_msqid_ds __P((struct msqid_ds *,
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struct linux_msqid_ds *));
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#endif
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#ifdef SYSVSHM
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static int linux_shmat __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_shmdt __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_shmget __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static int linux_shmctl __P((struct proc *, struct linux_sys_ipc_args *,
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register_t *));
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static void linux_to_bsd_shmid_ds __P((struct linux_shmid_ds *,
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struct shmid_ds *));
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static void bsd_to_linux_shmid_ds __P((struct shmid_ds *,
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struct linux_shmid_ds *));
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#endif
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#if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
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static void linux_to_bsd_ipc_perm __P((struct linux_ipc_perm *,
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struct ipc_perm *));
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static void bsd_to_linux_ipc_perm __P((struct ipc_perm *,
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struct linux_ipc_perm *));
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#endif
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int
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linux_sys_ipc(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap = v;
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switch (SCARG(uap, what)) {
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#ifdef SYSVSEM
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case LINUX_SYS_semop:
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return linux_semop(p, uap, retval);
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case LINUX_SYS_semget:
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return linux_semget(p, uap, retval);
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case LINUX_SYS_semctl:
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return linux_semctl(p, uap, retval);
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#endif
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#ifdef SYSVMSG
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case LINUX_SYS_msgsnd:
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return linux_msgsnd(p, uap, retval);
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case LINUX_SYS_msgrcv:
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return linux_msgrcv(p, uap, retval);
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case LINUX_SYS_msgget:
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return linux_msgget(p, uap, retval);
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case LINUX_SYS_msgctl:
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return linux_msgctl(p, uap, retval);
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#endif
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#ifdef SYSVSHM
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case LINUX_SYS_shmat:
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return linux_shmat(p, uap, retval);
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case LINUX_SYS_shmdt:
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return linux_shmdt(p, uap, retval);
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case LINUX_SYS_shmget:
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return linux_shmget(p, uap, retval);
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case LINUX_SYS_shmctl:
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return linux_shmctl(p, uap, retval);
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#endif
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default:
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return ENOSYS;
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}
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}
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#if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
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/*
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* Convert between Linux and NetBSD ipc_perm structures. Only the
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* order of the fields is different.
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*/
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static void
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linux_to_bsd_ipc_perm(lpp, bpp)
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struct linux_ipc_perm *lpp;
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struct ipc_perm *bpp;
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{
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bpp->key = lpp->l_key;
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bpp->uid = lpp->l_uid;
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bpp->gid = lpp->l_gid;
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bpp->cuid = lpp->l_cuid;
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bpp->cgid = lpp->l_cgid;
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bpp->mode = lpp->l_mode;
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bpp->seq = lpp->l_seq;
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}
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static void
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bsd_to_linux_ipc_perm(bpp, lpp)
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struct ipc_perm *bpp;
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struct linux_ipc_perm *lpp;
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{
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lpp->l_key = bpp->key;
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lpp->l_uid = bpp->uid;
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lpp->l_gid = bpp->gid;
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lpp->l_cuid = bpp->cuid;
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lpp->l_cgid = bpp->cgid;
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lpp->l_mode = bpp->mode;
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lpp->l_seq = bpp->seq;
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}
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#endif
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#ifdef SYSVSEM
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/*
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* Semaphore operations. Most constants and structures are the same on
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* both systems. Only semctl() needs some extra work.
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*/
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/*
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* Convert between Linux and NetBSD semid_ds structures.
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*/
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static void
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bsd_to_linux_semid_ds(bs, ls)
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struct semid_ds *bs;
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struct linux_semid_ds *ls;
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{
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bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm);
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ls->l_sem_otime = bs->sem_otime;
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ls->l_sem_ctime = bs->sem_ctime;
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ls->l_sem_nsems = bs->sem_nsems;
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ls->l_sem_base = bs->sem_base;
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}
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static void
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linux_to_bsd_semid_ds(ls, bs)
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struct linux_semid_ds *ls;
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struct semid_ds *bs;
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{
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linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm);
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bs->sem_otime = ls->l_sem_otime;
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bs->sem_ctime = ls->l_sem_ctime;
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bs->sem_nsems = ls->l_sem_nsems;
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bs->sem_base = ls->l_sem_base;
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}
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int
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linux_semop(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_semop_args bsa;
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SCARG(&bsa, semid) = SCARG(uap, a1);
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SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr);
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SCARG(&bsa, nsops) = SCARG(uap, a2);
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return sys_semop(p, &bsa, retval);
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}
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int
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linux_semget(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_semget_args bsa;
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SCARG(&bsa, key) = (key_t)SCARG(uap, a1);
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SCARG(&bsa, nsems) = SCARG(uap, a2);
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SCARG(&bsa, semflg) = SCARG(uap, a3);
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return sys_semget(p, &bsa, retval);
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}
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/*
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* Most of this can be handled by directly passing the arguments on,
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* buf IPC_* require a lot of copy{in,out} because of the extra indirection
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* (we are passed a pointer to a union cointaining a pointer to a semid_ds
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* structure.
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*/
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int
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linux_semctl(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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caddr_t sg;
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struct sys___semctl_args nua;
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struct semid_ds *bmp, bm;
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struct linux_semid_ds lm;
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union semun *bup;
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union linux_semun lu;
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int error;
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SCARG(&nua, semid) = SCARG(uap, a1);
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SCARG(&nua, semnum) = SCARG(uap, a2);
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SCARG(&nua, arg) = (union semun *)SCARG(uap, ptr);
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switch (SCARG(uap, a3)) {
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case LINUX_IPC_STAT:
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sg = stackgap_init(p->p_emul);
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bup = stackgap_alloc(&sg, sizeof (union semun));
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bmp = stackgap_alloc(&sg, sizeof (struct semid_ds));
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if ((error = copyout(&bmp, bup, sizeof bmp)))
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return error;
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SCARG(&nua, cmd) = IPC_STAT;
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SCARG(&nua, arg) = bup;
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if ((error = sys___semctl(p, &nua, retval)))
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return error;
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if ((error = copyin(bmp, &bm, sizeof bm)))
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return error;
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bsd_to_linux_semid_ds(&bm, &lm);
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if ((error = copyin(SCARG(uap, ptr), &lu, sizeof lu)))
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return error;
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return copyout(&lm, lu.l_buf, sizeof lm);
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case LINUX_IPC_SET:
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if ((error = copyin(SCARG(uap, ptr), &lu, sizeof lu)))
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return error;
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if ((error = copyin(lu.l_buf, &lm, sizeof lm)))
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return error;
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linux_to_bsd_semid_ds(&lm, &bm);
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sg = stackgap_init(p->p_emul);
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bup = stackgap_alloc(&sg, sizeof (union semun));
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bmp = stackgap_alloc(&sg, sizeof (struct semid_ds));
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if ((error = copyout(&bm, bmp, sizeof bm)))
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return error;
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if ((error = copyout(&bmp, bup, sizeof bmp)))
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return error;
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SCARG(&nua, cmd) = IPC_SET;
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SCARG(&nua, arg) = bup;
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return sys___semctl(p, &nua, retval);
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case LINUX_IPC_RMID:
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SCARG(&nua, cmd) = IPC_RMID;
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break;
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case LINUX_GETVAL:
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SCARG(&nua, cmd) = GETVAL;
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break;
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case LINUX_GETPID:
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SCARG(&nua, cmd) = GETPID;
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break;
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case LINUX_GETNCNT:
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SCARG(&nua, cmd) = GETNCNT;
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break;
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case LINUX_GETZCNT:
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SCARG(&nua, cmd) = GETZCNT;
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break;
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case LINUX_SETVAL:
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SCARG(&nua, cmd) = SETVAL;
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break;
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default:
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return EINVAL;
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}
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return sys___semctl(p, &nua, retval);
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}
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#endif /* SYSVSEM */
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#ifdef SYSVMSG
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static void
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linux_to_bsd_msqid_ds(lmp, bmp)
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struct linux_msqid_ds *lmp;
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struct msqid_ds *bmp;
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{
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linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm);
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bmp->msg_first = lmp->l_msg_first;
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bmp->msg_last = lmp->l_msg_last;
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bmp->msg_cbytes = lmp->l_msg_cbytes;
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bmp->msg_qnum = lmp->l_msg_qnum;
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bmp->msg_qbytes = lmp->l_msg_qbytes;
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bmp->msg_lspid = lmp->l_msg_lspid;
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bmp->msg_lrpid = lmp->l_msg_lrpid;
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bmp->msg_stime = lmp->l_msg_stime;
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bmp->msg_rtime = lmp->l_msg_rtime;
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bmp->msg_ctime = lmp->l_msg_ctime;
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}
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static void
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bsd_to_linux_msqid_ds(bmp, lmp)
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struct msqid_ds *bmp;
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struct linux_msqid_ds *lmp;
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{
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bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm);
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lmp->l_msg_first = bmp->msg_first;
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lmp->l_msg_last = bmp->msg_last;
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lmp->l_msg_cbytes = bmp->msg_cbytes;
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lmp->l_msg_qnum = bmp->msg_qnum;
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lmp->l_msg_qbytes = bmp->msg_qbytes;
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lmp->l_msg_lspid = bmp->msg_lspid;
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lmp->l_msg_lrpid = bmp->msg_lrpid;
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lmp->l_msg_stime = bmp->msg_stime;
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lmp->l_msg_rtime = bmp->msg_rtime;
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lmp->l_msg_ctime = bmp->msg_ctime;
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}
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static int
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linux_msgsnd(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_msgsnd_args bma;
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SCARG(&bma, msqid) = SCARG(uap, a1);
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SCARG(&bma, msgp) = SCARG(uap, ptr);
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SCARG(&bma, msgsz) = SCARG(uap, a2);
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SCARG(&bma, msgflg) = SCARG(uap, a3);
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return sys_msgsnd(p, &bma, retval);
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}
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static int
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linux_msgrcv(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
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} */ *uap;
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register_t *retval;
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{
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struct sys_msgrcv_args bma;
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struct linux_msgrcv_msgarg kluge;
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int error;
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if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge)))
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return error;
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SCARG(&bma, msqid) = SCARG(uap, a1);
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SCARG(&bma, msgp) = kluge.msg;
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SCARG(&bma, msgsz) = SCARG(uap, a2);
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SCARG(&bma, msgtyp) = kluge.type;
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SCARG(&bma, msgflg) = SCARG(uap, a3);
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return sys_msgrcv(p, &bma, retval);
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}
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static int
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linux_msgget(p, uap, retval)
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struct proc *p;
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struct linux_sys_ipc_args /* {
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syscallarg(int) what;
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syscallarg(int) a1;
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syscallarg(int) a2;
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syscallarg(int) a3;
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syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct sys_msgget_args bma;
|
|
|
|
SCARG(&bma, key) = (key_t)SCARG(uap, a1);
|
|
SCARG(&bma, msgflg) = SCARG(uap, a2);
|
|
|
|
return sys_msgget(p, &bma, retval);
|
|
}
|
|
|
|
static int
|
|
linux_msgctl(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_sys_ipc_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(int) a1;
|
|
syscallarg(int) a2;
|
|
syscallarg(int) a3;
|
|
syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
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, a1);
|
|
switch (SCARG(uap, a2)) {
|
|
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, ptr), sizeof lm);
|
|
case LINUX_IPC_SET:
|
|
if ((error = copyin(SCARG(uap, ptr), &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;
|
|
return sys_msgctl(p, &nua, retval);
|
|
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.
|
|
*/
|
|
static int
|
|
linux_shmat(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_sys_ipc_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(int) a1;
|
|
syscallarg(int) a2;
|
|
syscallarg(int) a3;
|
|
syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct sys_shmat_args bsa;
|
|
int error;
|
|
|
|
SCARG(&bsa, shmid) = SCARG(uap, a1);
|
|
SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
|
|
SCARG(&bsa, shmflg) = SCARG(uap, a2);
|
|
|
|
if ((error = sys_shmat(p, &bsa, retval)))
|
|
return error;
|
|
|
|
if ((error = copyout(&retval[0], (caddr_t) SCARG(uap, a3),
|
|
sizeof retval[0])))
|
|
return error;
|
|
|
|
retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* shmdt(): this could have been mapped directly, if it wasn't for
|
|
* the extra indirection by the linux_ipc system call.
|
|
*/
|
|
static int
|
|
linux_shmdt(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_sys_ipc_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(int) a1;
|
|
syscallarg(int) a2;
|
|
syscallarg(int) a3;
|
|
syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct sys_shmdt_args bsa;
|
|
|
|
SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
|
|
|
|
return sys_shmdt(p, &bsa, retval);
|
|
}
|
|
|
|
/*
|
|
* Same story as shmdt.
|
|
*/
|
|
static int
|
|
linux_shmget(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_sys_ipc_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(int) a1;
|
|
syscallarg(int) a2;
|
|
syscallarg(int) a3;
|
|
syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct sys_shmget_args bsa;
|
|
|
|
SCARG(&bsa, key) = SCARG(uap, a1);
|
|
SCARG(&bsa, size) = SCARG(uap, a2);
|
|
SCARG(&bsa, shmflg) = SCARG(uap, a3);
|
|
|
|
return sys_shmget(p, &bsa, retval);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
static 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. */
|
|
}
|
|
|
|
static 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.
|
|
*/
|
|
static int
|
|
linux_shmctl(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_sys_ipc_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(int) a1;
|
|
syscallarg(int) a2;
|
|
syscallarg(int) a3;
|
|
syscallarg(caddr_t) ptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
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, a1);
|
|
switch (SCARG(uap, a2)) {
|
|
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(bsp, &bs, sizeof bs)))
|
|
return error;
|
|
bsd_to_linux_shmid_ds(&bs, &ls);
|
|
return copyout(&ls, SCARG(uap, ptr), sizeof ls);
|
|
case LINUX_IPC_SET:
|
|
if ((error = copyin(SCARG(uap, ptr), &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;
|
|
return sys_shmctl(p, &nua, retval);
|
|
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 */
|