freebsd-nq/sys/compat/linux/linux_ipc.c
Maxim Sobolev 3ad9c842d2 - Add support for IPC_64 extensions into shmctl(2), semctl(2) and msgctl(2);
- add wrappers for mmap2(2) and ftruncate64(2) system calls;
- don't spam console with printf's when VFAT_READDIR_BOTH ioctl(2) is invoked;
- add support for SOUND_MIXER_READ_STEREODEVS ioctl(2);
- make msgctl(IPC_STAT) and IPC_SET actually working by converting from
  BSD msqid_ds to Linux and vice versa;
- properly return EINVAL if semget(2) is called with nsems being negative.

Reviewed by:	marcel
Approved by:	marcel
Tested with:	LSB runtime test
2002-10-11 11:43:09 +00:00

791 lines
21 KiB
C

/*-
* Copyright (c) 1994-1995 Søren Schmidt
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/proc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <machine/limits.h>
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#include <machine/../linux/linux_ipc64.h>
#include <compat/linux/linux_ipc.h>
#include <compat/linux/linux_util.h>
struct l_seminfo {
l_int semmap;
l_int semmni;
l_int semmns;
l_int semmnu;
l_int semmsl;
l_int semopm;
l_int semume;
l_int semusz;
l_int semvmx;
l_int semaem;
};
struct l_shminfo {
l_int shmmax;
l_int shmmin;
l_int shmmni;
l_int shmseg;
l_int shmall;
};
struct l_shm_info {
l_int used_ids;
l_ulong shm_tot; /* total allocated shm */
l_ulong shm_rss; /* total resident shm */
l_ulong shm_swp; /* total swapped shm */
l_ulong swap_attempts;
l_ulong swap_successes;
};
static void
bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp)
{
lpp->shmmax = bpp->shmmax;
lpp->shmmin = bpp->shmmin;
lpp->shmmni = bpp->shmmni;
lpp->shmseg = bpp->shmseg;
lpp->shmall = bpp->shmall;
}
static void
bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
{
lpp->used_ids = bpp->used_ids ;
lpp->shm_tot = bpp->shm_tot ;
lpp->shm_rss = bpp->shm_rss ;
lpp->shm_swp = bpp->shm_swp ;
lpp->swap_attempts = bpp->swap_attempts ;
lpp->swap_successes = bpp->swap_successes ;
}
struct l_ipc_perm {
l_key_t key;
l_uid16_t uid;
l_gid16_t gid;
l_uid16_t cuid;
l_gid16_t cgid;
l_ushort mode;
l_ushort seq;
};
static void
linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
{
bpp->key = lpp->key;
bpp->uid = lpp->uid;
bpp->gid = lpp->gid;
bpp->cuid = lpp->cuid;
bpp->cgid = lpp->cgid;
bpp->mode = lpp->mode;
bpp->seq = lpp->seq;
}
static void
bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
{
lpp->key = bpp->key;
lpp->uid = bpp->uid;
lpp->gid = bpp->gid;
lpp->cuid = bpp->cuid;
lpp->cgid = bpp->cgid;
lpp->mode = bpp->mode;
lpp->seq = bpp->seq;
}
struct l_msqid_ds {
struct l_ipc_perm msg_perm;
struct l_msg *msg_first; /* first message on queue,unused */
struct l_msg *msg_last; /* last message in queue,unused */
l_time_t msg_stime; /* last msgsnd time */
l_time_t msg_rtime; /* last msgrcv time */
l_time_t msg_ctime; /* last change time */
l_ulong msg_lcbytes; /* Reuse junk fields for 32 bit */
l_ulong msg_lqbytes; /* ditto */
l_ushort msg_cbytes; /* current number of bytes on queue */
l_ushort msg_qnum; /* number of messages in queue */
l_ushort msg_qbytes; /* max number of bytes on queue */
l_pid_t msg_lspid; /* pid of last msgsnd */
l_pid_t msg_lrpid; /* last receive pid */
};
struct l_semid_ds {
struct l_ipc_perm sem_perm;
l_time_t sem_otime;
l_time_t sem_ctime;
void *sem_base;
void *sem_pending;
void *sem_pending_last;
void *undo;
l_ushort sem_nsems;
};
struct l_shmid_ds {
struct l_ipc_perm shm_perm;
l_int shm_segsz;
l_time_t shm_atime;
l_time_t shm_dtime;
l_time_t shm_ctime;
l_ushort shm_cpid;
l_ushort shm_lpid;
l_short shm_nattch;
l_ushort private1;
void *private2;
void *private3;
};
static void
linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
{
linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
bsp->sem_otime = lsp->sem_otime;
bsp->sem_ctime = lsp->sem_ctime;
bsp->sem_nsems = lsp->sem_nsems;
bsp->sem_base = lsp->sem_base;
}
static void
bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
{
bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
lsp->sem_otime = bsp->sem_otime;
lsp->sem_ctime = bsp->sem_ctime;
lsp->sem_nsems = bsp->sem_nsems;
lsp->sem_base = bsp->sem_base;
}
static void
linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
{
linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
bsp->shm_segsz = lsp->shm_segsz;
bsp->shm_lpid = lsp->shm_lpid;
bsp->shm_cpid = lsp->shm_cpid;
bsp->shm_nattch = lsp->shm_nattch;
bsp->shm_atime = lsp->shm_atime;
bsp->shm_dtime = lsp->shm_dtime;
bsp->shm_ctime = lsp->shm_ctime;
bsp->shm_internal = lsp->private3; /* this goes (yet) SOS */
}
static void
bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
{
bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
lsp->shm_segsz = bsp->shm_segsz;
lsp->shm_lpid = bsp->shm_lpid;
lsp->shm_cpid = bsp->shm_cpid;
lsp->shm_nattch = bsp->shm_nattch;
lsp->shm_atime = bsp->shm_atime;
lsp->shm_dtime = bsp->shm_dtime;
lsp->shm_ctime = bsp->shm_ctime;
lsp->private3 = bsp->shm_internal; /* this goes (yet) SOS */
}
static void
linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
{
linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
bsp->msg_cbytes = lsp->msg_cbytes;
bsp->msg_qnum = lsp->msg_qnum;
bsp->msg_qbytes = lsp->msg_qbytes;
bsp->msg_lspid = lsp->msg_lspid;
bsp->msg_lrpid = lsp->msg_lrpid;
bsp->msg_stime = lsp->msg_stime;
bsp->msg_rtime = lsp->msg_rtime;
bsp->msg_ctime = lsp->msg_ctime;
}
static void
bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
{
bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
lsp->msg_cbytes = bsp->msg_cbytes;
lsp->msg_qnum = bsp->msg_qnum;
lsp->msg_qbytes = bsp->msg_qbytes;
lsp->msg_lspid = bsp->msg_lspid;
lsp->msg_lrpid = bsp->msg_lrpid;
lsp->msg_stime = bsp->msg_stime;
lsp->msg_rtime = bsp->msg_rtime;
lsp->msg_ctime = bsp->msg_ctime;
}
static void
linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
{
/* XXX: do we really need to do something here? */
out->key = in->key;
out->uid = in->uid;
out->gid = in->gid;
out->cuid = in->cuid;
out->cgid = in->cgid;
out->mode = in->mode;
out->seq = in->seq;
}
static int
linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
{
struct l_msqid64_ds linux_msqid64;
int error;
if (ver == LINUX_IPC_64) {
error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
if (error != 0)
return (error);
bzero(linux_msqid, sizeof(*linux_msqid));
linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
if (linux_msqid64.msg_qbytes > USHRT_MAX)
linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
else
linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
} else {
error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
}
return (error);
}
static int
linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
{
struct l_msqid64_ds linux_msqid64;
if (ver == LINUX_IPC_64) {
bzero(&linux_msqid64, sizeof(linux_msqid64));
linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
&linux_msqid64.msg_perm);
linux_msqid64.msg_stime = linux_msqid->msg_stime;
linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
if (linux_msqid->msg_cbytes == 0)
linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
else
linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
if (linux_msqid->msg_qbytes == 0)
linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
else
linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
} else {
return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
}
}
static int
linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
{
struct l_semid64_ds linux_semid64;
int error;
if (ver == LINUX_IPC_64) {
error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
if (error != 0)
return (error);
bzero(linux_semid, sizeof(*linux_semid));
linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
} else {
error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
}
return (error);
}
static int
linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
{
struct l_semid64_ds linux_semid64;
if (ver == LINUX_IPC_64) {
bzero(&linux_semid64, sizeof(linux_semid64));
linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
&linux_semid64.sem_perm);
linux_semid64.sem_otime = linux_semid->sem_otime;
linux_semid64.sem_ctime = linux_semid->sem_ctime;
linux_semid64.sem_nsems = linux_semid->sem_nsems;
return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
} else {
return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
}
}
static int
linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
{
struct l_shmid64_ds linux_shmid64;
int error;
if (ver == LINUX_IPC_64) {
error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
if (error != 0)
return (error);
bzero(linux_shmid, sizeof(*linux_shmid));
linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
} else {
error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
}
return (error);
}
static int
linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
{
struct l_shmid64_ds linux_shmid64;
if (ver == LINUX_IPC_64) {
bzero(&linux_shmid64, sizeof(linux_shmid64));
linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
&linux_shmid64.shm_perm);
linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
linux_shmid64.shm_atime = linux_shmid->shm_atime;
linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
} else {
return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
}
}
static int
linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
caddr_t uaddr)
{
struct l_shminfo64 linux_shminfo64;
if (ver == LINUX_IPC_64) {
bzero(&linux_shminfo64, sizeof(linux_shminfo64));
linux_shminfo64.shmmax = linux_shminfo->shmmax;
linux_shminfo64.shmmin = linux_shminfo->shmmin;
linux_shminfo64.shmmni = linux_shminfo->shmmni;
linux_shminfo64.shmseg = linux_shminfo->shmseg;
linux_shminfo64.shmall = linux_shminfo->shmall;
return (copyout(&linux_shminfo64, uaddr,
sizeof(linux_shminfo64)));
} else {
return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
}
}
int
linux_semop(struct thread *td, struct linux_semop_args *args)
{
struct semop_args /* {
int semid;
struct sembuf *sops;
int nsops;
} */ bsd_args;
bsd_args.semid = args->semid;
bsd_args.sops = (struct sembuf *)args->tsops;
bsd_args.nsops = args->nsops;
return semop(td, &bsd_args);
}
int
linux_semget(struct thread *td, struct linux_semget_args *args)
{
struct semget_args /* {
key_t key;
int nsems;
int semflg;
} */ bsd_args;
if (args->nsems < 0)
return (EINVAL);
bsd_args.key = args->key;
bsd_args.nsems = args->nsems;
bsd_args.semflg = args->semflg;
return semget(td, &bsd_args);
}
int
linux_semctl(struct thread *td, struct linux_semctl_args *args)
{
struct l_semid_ds linux_semid;
struct __semctl_args /* {
int semid;
int semnum;
int cmd;
union semun *arg;
} */ bsd_args;
struct l_seminfo linux_seminfo;
int error;
union semun *unptr;
caddr_t sg;
sg = stackgap_init();
/* Make sure the arg parameter can be copied in. */
unptr = stackgap_alloc(&sg, sizeof(union semun));
bcopy(&args->arg, unptr, sizeof(union semun));
bsd_args.semid = args->semid;
bsd_args.semnum = args->semnum;
bsd_args.arg = unptr;
switch (args->cmd & ~LINUX_IPC_64) {
case LINUX_IPC_RMID:
bsd_args.cmd = IPC_RMID;
break;
case LINUX_GETNCNT:
bsd_args.cmd = GETNCNT;
break;
case LINUX_GETPID:
bsd_args.cmd = GETPID;
break;
case LINUX_GETVAL:
bsd_args.cmd = GETVAL;
break;
case LINUX_GETZCNT:
bsd_args.cmd = GETZCNT;
break;
case LINUX_SETVAL:
bsd_args.cmd = SETVAL;
break;
case LINUX_IPC_SET:
bsd_args.cmd = IPC_SET;
error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
&linux_semid, (caddr_t)args->arg.buf);
if (error)
return (error);
unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
linux_to_bsd_semid_ds(&linux_semid, unptr->buf);
return __semctl(td, &bsd_args);
case LINUX_IPC_STAT:
case LINUX_SEM_STAT:
if((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
bsd_args.cmd = IPC_STAT;
else
bsd_args.cmd = SEM_STAT;
unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
error = __semctl(td, &bsd_args);
if (error)
return error;
td->td_retval[0] = IXSEQ_TO_IPCID(bsd_args.semid,
unptr->buf->sem_perm);
bsd_to_linux_semid_ds(unptr->buf, &linux_semid);
return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
&linux_semid, (caddr_t)args->arg.buf));
case LINUX_IPC_INFO:
case LINUX_SEM_INFO:
bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) );
/* XXX BSD equivalent?
#define used_semids 10
#define used_sems 10
linux_seminfo.semusz = used_semids;
linux_seminfo.semaem = used_sems;
*/
error = copyout((caddr_t)&linux_seminfo, (caddr_t)args->arg.buf,
sizeof(linux_seminfo) );
if (error)
return error;
td->td_retval[0] = seminfo.semmni;
return 0; /* No need for __semctl call */
case LINUX_GETALL:
/* FALLTHROUGH */
case LINUX_SETALL:
/* FALLTHROUGH */
default:
uprintf("linux: 'ipc' typ=%d not implemented\n",
args->cmd & ~LINUX_IPC_64);
return EINVAL;
}
return __semctl(td, &bsd_args);
}
int
linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
{
struct msgsnd_args /* {
int msqid;
void *msgp;
size_t msgsz;
int msgflg;
} */ bsd_args;
bsd_args.msqid = args->msqid;
bsd_args.msgp = args->msgp;
bsd_args.msgsz = args->msgsz;
bsd_args.msgflg = args->msgflg;
return msgsnd(td, &bsd_args);
}
int
linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
{
struct msgrcv_args /* {
int msqid;
void *msgp;
size_t msgsz;
long msgtyp;
int msgflg;
} */ bsd_args;
bsd_args.msqid = args->msqid;
bsd_args.msgp = args->msgp;
bsd_args.msgsz = args->msgsz;
bsd_args.msgtyp = args->msgtyp;
bsd_args.msgflg = args->msgflg;
return msgrcv(td, &bsd_args);
}
int
linux_msgget(struct thread *td, struct linux_msgget_args *args)
{
struct msgget_args /* {
key_t key;
int msgflg;
} */ bsd_args;
bsd_args.key = args->key;
bsd_args.msgflg = args->msgflg;
return msgget(td, &bsd_args);
}
int
linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
{
struct msgctl_args /* {
int msqid;
int cmd;
struct msqid_ds *buf;
} */ bsd_args;
int error;
struct l_msqid_ds linux_msqid;
caddr_t sg = stackgap_init();
error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
&linux_msqid, (caddr_t)args->buf);
if (error != 0)
return (error);
bsd_args.buf = (struct msqid_ds*)stackgap_alloc(&sg,
sizeof(struct l_msqid_ds));
bsd_args.msqid = args->msqid;
bsd_args.cmd = args->cmd & ~LINUX_IPC_64;
if (bsd_args.cmd == LINUX_IPC_SET)
linux_to_bsd_msqid_ds(&linux_msqid, bsd_args.buf);
error = msgctl(td, &bsd_args);
if (error != 0)
if (bsd_args.cmd != LINUX_IPC_RMID || error != EINVAL)
return (error);
if (bsd_args.cmd == LINUX_IPC_STAT) {
bsd_to_linux_msqid_ds(bsd_args.buf, &linux_msqid);
return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
&linux_msqid, (caddr_t)args->buf));
}
return (0);
}
int
linux_shmat(struct thread *td, struct linux_shmat_args *args)
{
struct shmat_args /* {
int shmid;
void *shmaddr;
int shmflg;
} */ bsd_args;
int error;
bsd_args.shmid = args->shmid;
bsd_args.shmaddr = args->shmaddr;
bsd_args.shmflg = args->shmflg;
if ((error = shmat(td, &bsd_args)))
return error;
#ifdef __i386__
if ((error = copyout(td->td_retval, (caddr_t)args->raddr, sizeof(l_ulong))))
return error;
td->td_retval[0] = 0;
#endif
return 0;
}
int
linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
{
struct shmdt_args /* {
void *shmaddr;
} */ bsd_args;
bsd_args.shmaddr = args->shmaddr;
return shmdt(td, &bsd_args);
}
int
linux_shmget(struct thread *td, struct linux_shmget_args *args)
{
struct shmget_args /* {
key_t key;
int size;
int shmflg;
} */ bsd_args;
bsd_args.key = args->key;
bsd_args.size = args->size;
bsd_args.shmflg = args->shmflg;
return shmget(td, &bsd_args);
}
int
linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
{
struct l_shmid_ds linux_shmid;
struct l_shminfo linux_shminfo;
struct l_shm_info linux_shm_info;
struct shmctl_args /* {
int shmid;
int cmd;
struct shmid_ds *buf;
} */ bsd_args;
int error;
caddr_t sg = stackgap_init();
switch (args->cmd & ~LINUX_IPC_64) {
case LINUX_IPC_INFO:
bsd_args.shmid = args->shmid;
bsd_args.cmd = IPC_INFO;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shminfo));
if ((error = shmctl(td, &bsd_args)))
return error;
bsd_to_linux_shminfo( (struct shminfo *)bsd_args.buf, &linux_shminfo );
return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
&linux_shminfo, (caddr_t)args->buf));
case LINUX_SHM_INFO:
bsd_args.shmid = args->shmid;
bsd_args.cmd = SHM_INFO;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shm_info));
if ((error = shmctl(td, &bsd_args)))
return error;
bsd_to_linux_shm_info( (struct shm_info *)bsd_args.buf, &linux_shm_info );
return copyout(&linux_shm_info, (caddr_t)args->buf, sizeof(struct shm_info));
case LINUX_IPC_STAT:
bsd_args.shmid = args->shmid;
bsd_args.cmd = IPC_STAT;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
if ((error = shmctl(td, &bsd_args)))
return error;
bsd_to_linux_shmid_ds(bsd_args.buf, &linux_shmid);
return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
&linux_shmid, (caddr_t)args->buf));
case LINUX_SHM_STAT:
bsd_args.shmid = args->shmid;
bsd_args.cmd = SHM_STAT;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
if ((error = shmctl(td, &bsd_args))) {
return error;
}
bsd_to_linux_shmid_ds(bsd_args.buf, &linux_shmid);
return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
&linux_shmid, (caddr_t)args->buf));
case LINUX_IPC_SET:
error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
&linux_shmid, (caddr_t)args->buf);
if (error != 0)
return error;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
linux_to_bsd_shmid_ds(&linux_shmid, bsd_args.buf);
bsd_args.shmid = args->shmid;
bsd_args.cmd = IPC_SET;
return shmctl(td, &bsd_args);
case LINUX_IPC_RMID:
bsd_args.shmid = args->shmid;
bsd_args.cmd = IPC_RMID;
if (args->buf == NULL)
bsd_args.buf = NULL;
else {
error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
&linux_shmid, (caddr_t)args->buf);
if (error != 0)
return error;
bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
linux_to_bsd_shmid_ds(&linux_shmid, bsd_args.buf);
}
return shmctl(td, &bsd_args);
case LINUX_SHM_LOCK:
case LINUX_SHM_UNLOCK:
default:
uprintf("linux: 'ipc' typ=%d not implemented\n",
args->cmd & ~LINUX_IPC_64);
return EINVAL;
}
}