/*      $NetBSD: netbsd32_compat_30.c,v 1.36 2021/01/19 03:20:13 simonb Exp $   */

/*
 * Copyright (c) 1998, 2001 Matthew R. Green
 * 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.
 * 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 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_30.c,v 1.36 2021/01/19 03:20:13 simonb Exp $");

#if defined(_KERNEL_OPT)
#include <opt_ntp.h>
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/ktrace.h>
#include <sys/resourcevar.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/namei.h>
#include <sys/statvfs.h>
#include <sys/syscallargs.h>
#include <sys/syscallvar.h>
#include <sys/proc.h>
#include <sys/dirent.h>
#include <sys/kauth.h>
#include <sys/vfs_syscalls.h>
#include <sys/compat_stub.h>

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

int
compat_30_netbsd32_getdents(struct lwp *l, const struct compat_30_netbsd32_getdents_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) fd;
                syscallarg(netbsd32_charp) buf;
                syscallarg(netbsd32_size_t) count;
        } */
        file_t *fp;
        int error, done;
        char  *buf;
        netbsd32_size_t count;

        /* Limit the size on any kernel buffers used by VOP_READDIR */
        count = uimin(MAXBSIZE, SCARG(uap, count));

        /* fd_getvnode() will use the descriptor for us */
        if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
                return error;
        if ((fp->f_flag & FREAD) == 0) {
                error = EBADF;
                goto out;
        }
        if (count == 0)
                goto out;

        buf = kmem_alloc(count, KM_SLEEP);
        error = vn_readdir(fp, buf, UIO_SYSSPACE, count, &done, l, 0, 0);
        if (error == 0) {
                *retval = netbsd32_to_dirent12(buf, done);
                error = copyout(buf, SCARG_P32(uap, buf), *retval);
        }
        kmem_free(buf, count);
 out:
        fd_putfile(SCARG(uap, fd));
        return error;
}

int
compat_30_netbsd32___stat13(struct lwp *l, const struct compat_30_netbsd32___stat13_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_charp) path;
                syscallarg(netbsd32_stat13p_t) ub;
        } */
        struct netbsd32_stat13 sb32;
        struct stat sb;
        int error;
        const char *path;

        path = SCARG_P32(uap, path);

        error = do_sys_stat(path, FOLLOW, &sb);
        if (error)
                return error;
        netbsd32_from___stat13(&sb, &sb32);
        error = copyout(&sb32, SCARG_P32(uap, ub), sizeof(sb32));
        return error;
}

int
compat_30_netbsd32___fstat13(struct lwp *l, const struct compat_30_netbsd32___fstat13_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) fd;
                syscallarg(netbsd32_stat13p_t) sb;
        } */
        struct netbsd32_stat13 sb32;
        struct stat ub;
        int error;

        error = do_sys_fstat(SCARG(uap, fd), &ub);
        if (error == 0) {
                netbsd32_from___stat13(&ub, &sb32);
                error = copyout(&sb32, SCARG_P32(uap, sb), sizeof(sb32));
        }
        return error;
}

int
compat_30_netbsd32___lstat13(struct lwp *l, const struct compat_30_netbsd32___lstat13_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_charp) path;
                syscallarg(netbsd32_stat13p_t) ub;
        } */
        struct netbsd32_stat13 sb32;
        struct stat sb;
        int error;
        const char *path;

        path = SCARG_P32(uap, path);

        error = do_sys_stat(path, NOFOLLOW, &sb);
        if (error)
                return error;
        netbsd32_from___stat13(&sb, &sb32);
        error = copyout(&sb32, SCARG_P32(uap, ub), sizeof(sb32));
        return error;
}

int
compat_30_netbsd32_fhstat(struct lwp *l, const struct compat_30_netbsd32_fhstat_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_fhandlep_t) fhp;
                syscallarg(netbsd32_stat13p_t) sb;
        } */
        struct stat sb;
        struct netbsd32_stat13 sb32;
        int error;
        struct compat_30_fhandle fh;
        struct mount *mp;
        struct vnode *vp;

        /*
         * Must be super user
         */
        if ((error = kauth_authorize_system(l->l_cred,
            KAUTH_SYSTEM_FILEHANDLE, 0, NULL, NULL, NULL)))
                return error;

        if ((error = copyin(SCARG_P32(uap, fhp), &fh, sizeof(fh))) != 0)
                return error;

        if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
                return ESTALE;
        if (mp->mnt_op->vfs_fhtovp == NULL)
                return EOPNOTSUPP;
        if ((error = VFS_FHTOVP(mp, (struct fid*)&fh.fh_fid, LK_EXCLUSIVE, &vp)))
                return error;
        error = vn_stat(vp, &sb);
        vput(vp);
        if (error)
                return error;
        netbsd32_from___stat13(&sb, &sb32);
        error = copyout(&sb32, SCARG_P32(uap, sb), sizeof(sb32));
        return error;
}

int
compat_30_netbsd32_fhstatvfs1(struct lwp *l, const struct compat_30_netbsd32_fhstatvfs1_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_fhandlep_t) fhp;
                syscallarg(netbsd32_statvfsp_t) buf;
                syscallarg(int) flags;
        } */
        struct statvfs *sbuf;
        struct netbsd32_statvfs *s32;
        int error;

        sbuf = STATVFSBUF_GET();
        error = do_fhstatvfs(l, SCARG_P32(uap, fhp), FHANDLE_SIZE_COMPAT, sbuf,
            SCARG(uap, flags));

        if (error != 0) {
                s32 = kmem_alloc(sizeof(*s32), KM_SLEEP);
                netbsd32_from_statvfs(sbuf, s32);
                error = copyout(s32, SCARG_P32(uap, buf), sizeof *s32);
                kmem_free(s32, sizeof(*s32));
        }
        STATVFSBUF_PUT(sbuf);

        return error;
}

int
compat_30_netbsd32_socket(struct lwp *l, const struct compat_30_netbsd32_socket_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) domain;
                syscallarg(int) type;
                syscallarg(int) protocol;
        } */
        struct compat_30_sys_socket_args ua;

        NETBSD32TO64_UAP(domain);
        NETBSD32TO64_UAP(type);
        NETBSD32TO64_UAP(protocol);
        return compat_30_sys_socket(l, &ua, retval);
}

int
compat_30_netbsd32_getfh(struct lwp *l, const struct compat_30_netbsd32_getfh_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_charp) fname;
                syscallarg(netbsd32_compat_30_fhandlep_t) fhp;
        } */
        struct compat_30_sys_getfh_args ua;

        NETBSD32TOP_UAP(fname, const char);
        NETBSD32TOP_UAP(fhp, struct compat_30_fhandle);
        /* Lucky for us a fhandle_t doesn't change sizes */
        return compat_30_sys_getfh(l, &ua, retval);
}


int
compat_30_netbsd32___fhstat30(struct lwp *l, const struct compat_30_netbsd32___fhstat30_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_fhandlep_t) fhp;
                syscallarg(netbsd32_statp_t) sb;
        } */
        struct stat sb;
        struct netbsd32_stat50 sb32;
        int error;

        error = do_fhstat(l, SCARG_P32(uap, fhp), FHANDLE_SIZE_COMPAT, &sb);
        if (error)
                return error;

        netbsd32_from___stat50(&sb, &sb32);
        error = copyout(&sb32, SCARG_P32(uap, sb), sizeof(sb32));
        return error;
}

/*
 * Open a file given a file handle.
 *
 * Check permissions, allocate an open file structure,
 * and call the device open routine if any.
 */
int
compat_30_netbsd32_fhopen(struct lwp *l, const struct compat_30_netbsd32_fhopen_args *uap, register_t *retval)
{
        /* {
                syscallarg(const fhandle_t *) fhp;
                syscallarg(int) flags;
        } */
        struct compat_30_sys_fhopen_args ua;

        NETBSD32TOP_UAP(fhp, struct compat_30_fhandle);
        NETBSD32TO64_UAP(flags);
        return compat_30_sys_fhopen(l, &ua, retval);
}

#ifdef NTP
int
compat_30_netbsd32_ntp_gettime(struct lwp *l, const struct compat_30_netbsd32_ntp_gettime_args *uap, register_t *retval)
{
        /* {
                syscallarg(netbsd32_ntptimevalp_t) ntvp;
        } */
        struct netbsd32_ntptimeval30 ntv32;
        struct ntptimeval ntv;
        int error = 0;

        if (vec_ntp_gettime == NULL)
                return EINVAL;

        if (SCARG_P32(uap, ntvp)) {
                (*vec_ntp_gettime)(&ntv);

                memset(&ntv32, 0, sizeof(ntv32));
                ntv32.time.tv_sec = ntv.time.tv_sec;
                ntv32.time.tv_usec = ntv.time.tv_nsec / 1000;
                ntv32.maxerror = (netbsd32_long)ntv.maxerror;
                ntv32.esterror = (netbsd32_long)ntv.esterror;
                error = copyout(&ntv32, SCARG_P32(uap, ntvp), sizeof(ntv32));
        }
        if (!error) {
                *retval = (*vec_ntp_timestatus)();
        }

        return error;
}
#endif

static struct syscall_package compat_netbsd32_30_syscalls[] = {
        { NETBSD32_SYS_compat_30_netbsd32_getdents, 0,
            (sy_call_t *)compat_30_netbsd32_getdents }, 
        { NETBSD32_SYS_compat_30_netbsd32___stat13, 0,
            (sy_call_t *)compat_30_netbsd32___stat13 }, 
        { NETBSD32_SYS_compat_30_netbsd32___fstat13, 0,
            (sy_call_t *)compat_30_netbsd32___fstat13 }, 
        { NETBSD32_SYS_compat_30_netbsd32___lstat13, 0,
            (sy_call_t *)compat_30_netbsd32___lstat13 }, 
        { NETBSD32_SYS_compat_30_netbsd32_fhstat, 0,
            (sy_call_t *)compat_30_netbsd32_fhstat }, 
        { NETBSD32_SYS_compat_30_netbsd32_fhstatvfs1, 0,
            (sy_call_t *)compat_30_netbsd32_fhstatvfs1 }, 
        { NETBSD32_SYS_compat_30_netbsd32_socket, 0,
            (sy_call_t *)compat_30_netbsd32_socket }, 
        { NETBSD32_SYS_compat_30_netbsd32_getfh, 0,
            (sy_call_t *)compat_30_netbsd32_getfh }, 
        { NETBSD32_SYS_compat_30_netbsd32___fhstat30, 0,
            (sy_call_t *)compat_30_netbsd32___fhstat30 }, 
        { NETBSD32_SYS_compat_30_netbsd32_fhopen, 0,
            (sy_call_t *)compat_30_netbsd32_fhopen }, 
#ifdef NTP
        { NETBSD32_SYS_compat_30_netbsd32_ntp_gettime, 0,
            (sy_call_t *)compat_30_netbsd32_ntp_gettime }, 
#endif
        { 0, 0, NULL }
};

MODULE(MODULE_CLASS_EXEC, compat_netbsd32_30, "compat_netbsd32_40,compat_30");

static int
compat_netbsd32_30_modcmd(modcmd_t cmd, void *arg)
{

        switch (cmd) {
        case MODULE_CMD_INIT:
                return syscall_establish(&emul_netbsd32,
                    compat_netbsd32_30_syscalls);

        case MODULE_CMD_FINI:
                return syscall_disestablish(&emul_netbsd32,
                    compat_netbsd32_30_syscalls);

        default:
                return ENOTTY;
        }
}