/*      $NetBSD: netbsd32_mqueue.c,v 1.7 2019/01/27 02:08:40 pgoyette Exp $     */

/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software developed for The NetBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_mqueue.c,v 1.7 2019/01/27 02:08:40 pgoyette Exp $");

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

#include <sys/param.h>
#include <sys/dirent.h>
#include <sys/filedesc.h>
#include <sys/fcntl.h>
#include <sys/module.h>
#include <sys/syscallvar.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>

int
netbsd32_mq_open(struct lwp *l, const struct netbsd32_mq_open_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(const netbsd32_charp) name;
               syscallarg(int) oflag;
               syscallarg(mode_t) mode;
               syscallarg(struct netbsd32_mq_attrp_t) attr;
       } */
       struct netbsd32_mq_attr attr32;
       struct mq_attr *attr = NULL, a;
       int error;

       if ((SCARG(uap, oflag) & O_CREAT) && SCARG_P32(uap, attr) != NULL) {
               error = copyin(SCARG_P32(uap, attr), &attr32, sizeof(attr32));
               if (error)
                       return error;
               netbsd32_to_mq_attr(&attr32, &a);
               attr = &a;
       }

       return mq_handle_open(l, SCARG_P32(uap, name), SCARG(uap, oflag),
           SCARG(uap, mode), attr, retval);
}

int
netbsd32_mq_close(struct lwp *l, const struct netbsd32_mq_close_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
       } */

       return netbsd32_close(l, (const void*)uap, retval);
}

int
netbsd32_mq_unlink(struct lwp *l, const struct netbsd32_mq_unlink_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(const netbsd32_charp) name;
       } */
       struct sys_mq_unlink_args ua;

       NETBSD32TOP_UAP(name, const char);
       return sys_mq_unlink(l, &ua, retval);
}

int
netbsd32_mq_getattr(struct lwp *l, const struct netbsd32_mq_getattr_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(netbsd32_mq_attrp_t) mqstat;
       } */
       struct mqueue *mq;
       struct mq_attr attr;
       struct netbsd32_mq_attr a32;
       int error;

       error = mqueue_get(SCARG(uap, mqdes), 0, &mq);
       if (error)
               return error;

       memcpy(&attr, &mq->mq_attrib, sizeof(struct mq_attr));
       mutex_exit(&mq->mq_mtx);
       fd_putfile((int)SCARG(uap, mqdes));
       netbsd32_from_mq_attr(&attr, &a32);
       return copyout(&a32, SCARG_P32(uap,mqstat), sizeof(a32));
}

int
netbsd32_mq_setattr(struct lwp *l, const struct netbsd32_mq_setattr_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(const netbsd32_mq_attrp_t) mqstat;
               syscallarg(netbsd32_mq_attrp_t) omqstat;
       } */
       struct mqueue *mq;
       struct netbsd32_mq_attr attr32;
       struct mq_attr attr;
       int error, nonblock;

       error = copyin(SCARG_P32(uap, mqstat), &attr32, sizeof(attr32));
       if (error)
               return error;
       netbsd32_to_mq_attr(&attr32, &attr);
       nonblock = (attr.mq_flags & O_NONBLOCK);

       error = mqueue_get(SCARG(uap, mqdes), 0, &mq);
       if (error)
               return error;

       /* Copy the old attributes, if needed */
       if (SCARG_P32(uap, omqstat))
               memcpy(&attr, &mq->mq_attrib, sizeof(struct mq_attr));

       /* Ignore everything, except O_NONBLOCK */
       if (nonblock)
               mq->mq_attrib.mq_flags |= O_NONBLOCK;
       else
               mq->mq_attrib.mq_flags &= ~O_NONBLOCK;

       mutex_exit(&mq->mq_mtx);
       fd_putfile((int)SCARG(uap, mqdes));

       /*
        * Copy the data to the user-space.
        * Note: According to POSIX, the new attributes should not be set in
        * case of fail - this would be violated.
        */
       if (SCARG_P32(uap, omqstat)) {
               netbsd32_from_mq_attr(&attr, &attr32);
               error = copyout(&attr32, SCARG_P32(uap, omqstat),
                   sizeof(attr32));
       }

       return error;
}

int
netbsd32_mq_notify(struct lwp *l, const struct netbsd32_mq_notify_args *uap,
   register_t *result)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(const netbsd32_sigeventp_t) notification;
       } */
       struct mqueue *mq;
       struct netbsd32_sigevent sig32;
       int error;

       if (SCARG_P32(uap, notification)) {
               /* Get the signal from user-space */
               error = copyin(SCARG_P32(uap, notification), &sig32,
                   sizeof(sig32));
               if (error)
                       return error;
               if (sig32.sigev_notify == SIGEV_SIGNAL &&
                   (sig32.sigev_signo <=0 || sig32.sigev_signo >= NSIG))
                       return EINVAL;
       }

       error = mqueue_get(SCARG(uap, mqdes), 0, &mq);
       if (error) {
               return error;
       }
       if (SCARG_P32(uap, notification)) {
               /* Register notification: set the signal and target process */
               if (mq->mq_notify_proc == NULL) {
                       netbsd32_to_sigevent(&sig32, &mq->mq_sig_notify);
                       mq->mq_notify_proc = l->l_proc;
               } else {
                       /* Fail if someone else already registered */
                       error = EBUSY;
               }
       } else {
               /* Unregister the notification */
               mq->mq_notify_proc = NULL;
       }
       mutex_exit(&mq->mq_mtx);
       fd_putfile((int)SCARG(uap, mqdes));

       return error;
}

int
netbsd32_mq_send(struct lwp *l, const struct netbsd32_mq_send_args *uap,
   register_t *result)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(const netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(unsigned) msg_prio;
       } */


       return mq_send1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG(uap, msg_prio), NULL);
}

int
netbsd32_mq_receive(struct lwp *l, const struct netbsd32_mq_receive_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(netbsd32_uintp) msg_prio;
       } */
       ssize_t mlen;
       int error;

       error = mq_recv1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG_P32(uap, msg_prio), NULL, &mlen);
       if (error == 0)
               *retval = mlen;

       return error;
}

int
netbsd32___mq_timedsend50(struct lwp *l,
    const struct netbsd32___mq_timedsend50_args *uap, register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(const netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(unsigned) msg_prio;
               syscallarg(const netbsd32_timespecp_t) abs_timeout;
       } */
       struct timespec ts, *tsp;
       struct netbsd32_timespec ts32;
       int error;

       /* Get and convert time value */
       if (SCARG_P32(uap, abs_timeout)) {
               error = copyin(SCARG_P32(uap, abs_timeout), &ts32,
                    sizeof(ts32));
               if (error)
                       return error;
               netbsd32_to_timespec(&ts32, &ts);
               tsp = &ts;
       } else {
               tsp = NULL;
       }

       return mq_send1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG(uap, msg_prio), tsp);
}

int
netbsd32___mq_timedreceive50(struct lwp *l,
   const struct netbsd32___mq_timedreceive50_args *uap, register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(netbsd32_uintp) msg_prio;
               syscallarg(const netbsd32_timespecp_t) abs_timeout;
       } */
       struct timespec ts, *tsp;
       struct netbsd32_timespec ts32;
       ssize_t mlen;
       int error;

       /* Get and convert time value */
       if (SCARG_P32(uap, abs_timeout)) {
               error = copyin(SCARG_P32(uap, abs_timeout), &ts32,
                   sizeof(ts32));
               if (error)
                       return error;
               netbsd32_to_timespec(&ts32, &ts);
               tsp = &ts;
       } else {
               tsp = NULL;
       }

       error = mq_recv1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG_P32(uap, msg_prio), tsp, &mlen);
       if (error == 0)
               *retval = mlen;

       return error;
}

#ifdef COMPAT_50

int
compat_50_netbsd32_mq_timedsend(struct lwp *l,
   const struct compat_50_netbsd32_mq_timedsend_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(const netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(unsigned) msg_prio;
               syscallarg(const netbsd32_timespec50p_t) abs_timeout;
       } */
       struct timespec ts, *tsp;
       struct netbsd32_timespec50 ts32;
       int error;

       /* Get and convert time value */
       if (SCARG_P32(uap, abs_timeout)) {
               error = copyin(SCARG_P32(uap, abs_timeout), &ts32,
                    sizeof(ts32));
               if (error)
                       return error;
               netbsd32_to_timespec50(&ts32, &ts);
               tsp = &ts;
       } else {
               tsp = NULL;
       }

       return mq_send1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG(uap, msg_prio), tsp);
}

int
compat_50_netbsd32_mq_timedreceive(struct lwp *l,
   const struct compat_50_netbsd32_mq_timedreceive_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(mqd_t) mqdes;
               syscallarg(netbsd32_charp) msg_ptr;
               syscallarg(netbsd32_size_t) msg_len;
               syscallarg(netbsd32_uintp) msg_prio;
               syscallarg(const netbsd32_timespec50p_t) abs_timeout;
       } */
       struct timespec ts, *tsp;
       struct netbsd32_timespec50 ts32;
       ssize_t mlen;
       int error;

       /* Get and convert time value */
       if (SCARG_P32(uap, abs_timeout)) {
               error = copyin(SCARG_P32(uap, abs_timeout), &ts32,
                   sizeof(ts32));
               if (error)
                       return error;
               netbsd32_to_timespec50(&ts32, &ts);
               tsp = &ts;
       } else {
               tsp = NULL;
       }

       error = mq_recv1(SCARG(uap, mqdes), SCARG_P32(uap, msg_ptr),
           SCARG(uap, msg_len), SCARG_P32(uap, msg_prio), tsp, &mlen);
       if (error == 0)
               *retval = mlen;

       return error;
}

#endif /* COMPAT_50 */

#define _PKG_ENTRY(name)        \
       { NETBSD32_SYS_ ## name, 0, (sy_call_t *)name }

static const struct syscall_package compat_mqueue_syscalls[] = {
       _PKG_ENTRY(netbsd32_mq_open),
       _PKG_ENTRY(netbsd32_mq_close),
       _PKG_ENTRY(netbsd32_mq_unlink),
       _PKG_ENTRY(netbsd32_mq_getattr),
       _PKG_ENTRY(netbsd32_mq_setattr),
       _PKG_ENTRY(netbsd32_mq_notify),
       _PKG_ENTRY(netbsd32_mq_send),
       _PKG_ENTRY(netbsd32_mq_receive),
       _PKG_ENTRY(netbsd32___mq_timedsend50),
       _PKG_ENTRY(netbsd32___mq_timedreceive50),
#ifdef COMPAT_50
       _PKG_ENTRY(compat_50_netbsd32_mq_timedsend),
       _PKG_ENTRY(compat_50_netbsd32_mq_timedreceive),
#endif
       {0, 0, NULL}
};

MODULE(MODULE_CLASS_EXEC, compat_netbsd32_mqueue, "mqueue,compat_netbsd32");

static int
compat_netbsd32_mqueue_modcmd(modcmd_t cmd, void *arg)
{
       int error;

       switch (cmd) {
       case MODULE_CMD_INIT:
               error = syscall_establish(&emul_netbsd32,
                   compat_mqueue_syscalls);
               break;
       case MODULE_CMD_FINI:
               error = syscall_disestablish(&emul_netbsd32,
                   compat_mqueue_syscalls);
               break;
       default:
               error = ENOTTY;
               break;
       }
       return error;
}

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