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ba98833992
layer does not like the null shmid_ds buffer pointer. The emulation layer returned an error without ever calling FreeBSD's shmctl, so the segments were not being deleted when the reference count went to zero." Submitted by: Kevin Street <street@iname.com>
489 lines
13 KiB
C
489 lines
13 KiB
C
/*-
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* Copyright (c) 1994-1995 Søren Schmidt
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough 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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* $Id: linux_ipc.c,v 1.13 1997/11/06 19:28:57 phk Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/proc.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include <i386/linux/linux.h>
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#include <i386/linux/linux_proto.h>
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#include <i386/linux/linux_util.h>
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static int linux_semop __P((struct proc *, struct linux_ipc_args *));
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static int linux_semget __P((struct proc *, struct linux_ipc_args *));
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static int linux_semctl __P((struct proc *, struct linux_ipc_args *));
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static int linux_msgsnd __P((struct proc *, struct linux_ipc_args *));
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static int linux_msgrcv __P((struct proc *, struct linux_ipc_args *));
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static int linux_msgctl __P((struct proc *, struct linux_ipc_args *));
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static int linux_shmat __P((struct proc *, struct linux_ipc_args *));
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static int linux_shmdt __P((struct proc *, struct linux_ipc_args *));
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static int linux_shmget __P((struct proc *, struct linux_ipc_args *));
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static int linux_shmctl __P((struct proc *, struct linux_ipc_args *));
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struct linux_ipc_perm {
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linux_key_t key;
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unsigned short uid;
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unsigned short gid;
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unsigned short cuid;
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unsigned short cgid;
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unsigned short mode;
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unsigned short seq;
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};
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static void
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linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp)
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{
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bpp->key = lpp->key;
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bpp->uid = lpp->uid;
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bpp->gid = lpp->gid;
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bpp->cuid = lpp->cuid;
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bpp->cgid = lpp->cgid;
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bpp->mode = lpp->mode;
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bpp->seq = lpp->seq;
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}
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static void
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bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp)
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{
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lpp->key = bpp->key;
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lpp->uid = bpp->uid;
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lpp->gid = bpp->gid;
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lpp->cuid = bpp->cuid;
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lpp->cgid = bpp->cgid;
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lpp->mode = bpp->mode;
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lpp->seq = bpp->seq;
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}
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struct linux_semid_ds {
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struct linux_ipc_perm sem_perm;
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linux_time_t sem_otime;
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linux_time_t sem_ctime;
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void *sem_base;
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void *sem_pending;
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void *sem_pending_last;
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void *undo;
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ushort sem_nsems;
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};
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struct linux_shmid_ds {
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struct linux_ipc_perm shm_perm;
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int shm_segsz;
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linux_time_t shm_atime;
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linux_time_t shm_dtime;
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linux_time_t shm_ctime;
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ushort shm_cpid;
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ushort shm_lpid;
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short shm_nattch;
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ushort private1;
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void *private2;
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void *private3;
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};
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static void
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linux_to_bsd_semid_ds(struct linux_semid_ds *lsp, struct semid_ds *bsp)
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{
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linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
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bsp->sem_otime = lsp->sem_otime;
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bsp->sem_ctime = lsp->sem_ctime;
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bsp->sem_nsems = lsp->sem_nsems;
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bsp->sem_base = lsp->sem_base;
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}
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static void
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bsd_to_linux_semid_ds(struct semid_ds *bsp, struct linux_semid_ds *lsp)
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{
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bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
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lsp->sem_otime = bsp->sem_otime;
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lsp->sem_ctime = bsp->sem_ctime;
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lsp->sem_nsems = bsp->sem_nsems;
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lsp->sem_base = bsp->sem_base;
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}
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static void
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linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp)
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{
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linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
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bsp->shm_segsz = lsp->shm_segsz;
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bsp->shm_lpid = lsp->shm_lpid;
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bsp->shm_cpid = lsp->shm_cpid;
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bsp->shm_nattch = lsp->shm_nattch;
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bsp->shm_atime = lsp->shm_atime;
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bsp->shm_dtime = lsp->shm_dtime;
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bsp->shm_ctime = lsp->shm_ctime;
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bsp->shm_internal = lsp->private3; /* this goes (yet) SOS */
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}
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static void
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bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp)
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{
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bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
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lsp->shm_segsz = bsp->shm_segsz;
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lsp->shm_lpid = bsp->shm_lpid;
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lsp->shm_cpid = bsp->shm_cpid;
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lsp->shm_nattch = bsp->shm_nattch;
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lsp->shm_atime = bsp->shm_atime;
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lsp->shm_dtime = bsp->shm_dtime;
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lsp->shm_ctime = bsp->shm_ctime;
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lsp->private3 = bsp->shm_internal; /* this goes (yet) SOS */
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}
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static int
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linux_semop(struct proc *p, struct linux_ipc_args *args)
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{
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struct semop_args /* {
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int semid;
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struct sembuf *sops;
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int nsops;
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} */ bsd_args;
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bsd_args.semid = args->arg1;
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bsd_args.sops = (struct sembuf *)args->ptr;
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bsd_args.nsops = args->arg2;
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return semop(p, &bsd_args);
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}
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static int
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linux_semget(struct proc *p, struct linux_ipc_args *args)
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{
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struct semget_args /* {
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key_t key;
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int nsems;
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int semflg;
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} */ bsd_args;
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bsd_args.key = args->arg1;
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bsd_args.nsems = args->arg2;
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bsd_args.semflg = args->arg3;
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return semget(p, &bsd_args);
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}
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static int
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linux_semctl(struct proc *p, struct linux_ipc_args *args)
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{
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struct linux_semid_ds linux_semid;
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struct semid_ds bsd_semid;
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struct __semctl_args /* {
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int semid;
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int semnum;
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int cmd;
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union semun *arg;
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} */ bsd_args;
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int error;
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caddr_t sg, unptr, dsp, ldsp;
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sg = stackgap_init();
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bsd_args.semid = args->arg1;
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bsd_args.semnum = args->arg2;
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bsd_args.cmd = args->arg3;
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bsd_args.arg = (union semun *)args->ptr;
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switch (args->arg3) {
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case LINUX_IPC_RMID:
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bsd_args.cmd = IPC_RMID;
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break;
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case LINUX_GETNCNT:
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bsd_args.cmd = GETNCNT;
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break;
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case LINUX_GETPID:
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bsd_args.cmd = GETPID;
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break;
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case LINUX_GETVAL:
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bsd_args.cmd = GETVAL;
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break;
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case LINUX_GETZCNT:
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bsd_args.cmd = GETZCNT;
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break;
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case LINUX_SETVAL:
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bsd_args.cmd = SETVAL;
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break;
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case LINUX_IPC_SET:
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bsd_args.cmd = IPC_SET;
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error = copyin(args->ptr, &ldsp, sizeof(ldsp));
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if (error)
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return error;
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error = copyin(ldsp, (caddr_t)&linux_semid, sizeof(linux_semid));
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if (error)
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return error;
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linux_to_bsd_semid_ds(&linux_semid, &bsd_semid);
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unptr = stackgap_alloc(&sg, sizeof(union semun));
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dsp = stackgap_alloc(&sg, sizeof(struct semid_ds));
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error = copyout((caddr_t)&bsd_semid, dsp, sizeof(bsd_semid));
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if (error)
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return error;
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error = copyout((caddr_t)&dsp, unptr, sizeof(dsp));
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if (error)
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return error;
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bsd_args.arg = (union semun *)unptr;
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return __semctl(p, &bsd_args);
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case LINUX_IPC_STAT:
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bsd_args.cmd = IPC_STAT;
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unptr = stackgap_alloc(&sg, sizeof(union semun *));
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dsp = stackgap_alloc(&sg, sizeof(struct semid_ds));
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error = copyout((caddr_t)&dsp, unptr, sizeof(dsp));
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if (error)
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return error;
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bsd_args.arg = (union semun *)unptr;
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error = __semctl(p, &bsd_args);
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if (error)
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return error;
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error = copyin(dsp, (caddr_t)&bsd_semid, sizeof(bsd_semid));
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if (error)
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return error;
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bsd_to_linux_semid_ds(&bsd_semid, &linux_semid);
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error = copyin(args->ptr, &ldsp, sizeof(ldsp));
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if (error)
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return error;
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return copyout((caddr_t)&linux_semid, ldsp, sizeof(linux_semid));
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case LINUX_GETALL:
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/* FALLTHROUGH */
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case LINUX_SETALL:
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/* FALLTHROUGH */
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default:
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uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
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return EINVAL;
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}
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return __semctl(p, &bsd_args);
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}
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static int
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linux_msgsnd(struct proc *p, struct linux_ipc_args *args)
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{
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struct msgsnd_args /* {
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int msqid;
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void *msgp;
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size_t msgsz;
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int msgflg;
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} */ bsd_args;
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bsd_args.msqid = args->arg1;
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bsd_args.msgp = args->ptr;
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bsd_args.msgsz = args->arg2;
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bsd_args.msgflg = args->arg3;
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return msgsnd(p, &bsd_args);
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}
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static int
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linux_msgrcv(struct proc *p, struct linux_ipc_args *args)
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{
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struct msgrcv_args /* {
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int msqid;
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void *msgp;
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size_t msgsz;
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long msgtyp;
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int msgflg;
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} */ bsd_args;
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bsd_args.msqid = args->arg1;
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bsd_args.msgp = args->ptr;
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bsd_args.msgsz = args->arg2;
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bsd_args.msgtyp = 0;
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bsd_args.msgflg = args->arg3;
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return msgrcv(p, &bsd_args);
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}
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static int
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linux_msgget(struct proc *p, struct linux_ipc_args *args)
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{
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struct msgget_args /* {
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key_t key;
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int msgflg;
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} */ bsd_args;
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bsd_args.key = args->arg1;
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bsd_args.msgflg = args->arg2;
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return msgget(p, &bsd_args);
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}
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static int
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linux_msgctl(struct proc *p, struct linux_ipc_args *args)
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{
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struct msgctl_args /* {
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int msqid;
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int cmd;
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struct msqid_ds *buf;
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} */ bsd_args;
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bsd_args.msqid = args->arg1;
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bsd_args.cmd = args->arg2;
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bsd_args.buf = (struct msqid_ds *)args->ptr;
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return msgctl(p, &bsd_args);
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}
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static int
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linux_shmat(struct proc *p, struct linux_ipc_args *args)
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{
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struct shmat_args /* {
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int shmid;
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void *shmaddr;
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int shmflg;
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} */ bsd_args;
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int error;
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bsd_args.shmid = args->arg1;
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bsd_args.shmaddr = args->ptr;
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bsd_args.shmflg = args->arg2;
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if ((error = shmat(p, &bsd_args)))
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return error;
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if ((error = copyout(p->p_retval, (caddr_t)args->arg3, sizeof(int))))
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return error;
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p->p_retval[0] = 0;
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return 0;
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}
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static int
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linux_shmdt(struct proc *p, struct linux_ipc_args *args)
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{
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struct shmdt_args /* {
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void *shmaddr;
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} */ bsd_args;
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bsd_args.shmaddr = args->ptr;
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return shmdt(p, &bsd_args);
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}
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static int
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linux_shmget(struct proc *p, struct linux_ipc_args *args)
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{
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struct shmget_args /* {
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key_t key;
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int size;
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int shmflg;
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} */ bsd_args;
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bsd_args.key = args->arg1;
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bsd_args.size = args->arg2;
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bsd_args.shmflg = args->arg3;
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return shmget(p, &bsd_args);
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}
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static int
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linux_shmctl(struct proc *p, struct linux_ipc_args *args)
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{
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struct shmid_ds bsd_shmid;
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struct linux_shmid_ds linux_shmid;
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struct shmctl_args /* {
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int shmid;
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int cmd;
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struct shmid_ds *buf;
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} */ bsd_args;
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int error;
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caddr_t sg = stackgap_init();
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switch (args->arg2) {
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case LINUX_IPC_STAT:
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bsd_args.shmid = args->arg1;
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bsd_args.cmd = IPC_STAT;
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bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
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if ((error = shmctl(p, &bsd_args)))
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return error;
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if ((error = copyin((caddr_t)bsd_args.buf, (caddr_t)&bsd_shmid,
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sizeof(struct shmid_ds))))
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return error;
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bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
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return copyout((caddr_t)&linux_shmid, args->ptr, sizeof(linux_shmid));
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case LINUX_IPC_SET:
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if ((error = copyin(args->ptr, (caddr_t)&linux_shmid,
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sizeof(linux_shmid))))
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return error;
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linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
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bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
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if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
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sizeof(struct shmid_ds))))
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return error;
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bsd_args.shmid = args->arg1;
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bsd_args.cmd = IPC_SET;
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return shmctl(p, &bsd_args);
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case LINUX_IPC_RMID:
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bsd_args.shmid = args->arg1;
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bsd_args.cmd = IPC_RMID;
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if (NULL == args->ptr)
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bsd_args.buf = NULL;
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else {
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if ((error = copyin(args->ptr, (caddr_t)&linux_shmid,
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sizeof(linux_shmid))))
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return error;
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linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
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bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
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if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
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sizeof(struct shmid_ds))))
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return error;
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}
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return shmctl(p, &bsd_args);
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case LINUX_IPC_INFO:
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case LINUX_SHM_STAT:
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case LINUX_SHM_INFO:
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case LINUX_SHM_LOCK:
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case LINUX_SHM_UNLOCK:
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default:
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uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
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return EINVAL;
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}
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}
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int
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linux_ipc(struct proc *p, struct linux_ipc_args *args)
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{
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switch (args->what) {
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case LINUX_SEMOP:
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return linux_semop(p, args);
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case LINUX_SEMGET:
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return linux_semget(p, args);
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case LINUX_SEMCTL:
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return linux_semctl(p, args);
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case LINUX_MSGSND:
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return linux_msgsnd(p, args);
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case LINUX_MSGRCV:
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return linux_msgrcv(p, args);
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case LINUX_MSGGET:
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return linux_msgget(p, args);
|
|
case LINUX_MSGCTL:
|
|
return linux_msgctl(p, args);
|
|
case LINUX_SHMAT:
|
|
return linux_shmat(p, args);
|
|
case LINUX_SHMDT:
|
|
return linux_shmdt(p, args);
|
|
case LINUX_SHMGET:
|
|
return linux_shmget(p, args);
|
|
case LINUX_SHMCTL:
|
|
return linux_shmctl(p, args);
|
|
default:
|
|
uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
|
|
return ENOSYS;
|
|
}
|
|
}
|