/*      $NetBSD: rumpvfs_compat50.c,v 1.3 2026/01/10 10:10:37 nia Exp $ */

/*
 * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
 *
 * Development of this software was supported by the Nokia 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 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 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: rumpvfs_compat50.c,v 1.3 2026/01/10 10:10:37 nia Exp $");

#include <sys/param.h>
#include <sys/endian.h>
#include <sys/kmem.h>
#include <sys/sched.h>
#include <sys/syscallargs.h>
#include <sys/vnode.h>

#include <compat/sys/time.h>

#include <rump-sys/vfs.h>

#include <rump/rump.h>

/*
 * XXX: these are handwritten for now.  They provide compat for
 * calling post-time_t file systems from a pre-time_t userland.
 * (mknod is missing.  I don't care very much)
 *
 * Doing remote system calls with these does not (obviously) work.
 */
#if     BYTE_ORDER == BIG_ENDIAN
#define SPARG(p,k)      ((p)->k.be.datum)
#else /* LITTLE_ENDIAN, I hope dearly */
#define SPARG(p,k)      ((p)->k.le.datum)
#endif

struct vattr50 {
        enum vtype      va_type;        /* vnode type (for create) */
        mode_t          va_mode;        /* files access mode and type */
        nlink_t         va_nlink;       /* number of references to file */
        uid_t           va_uid;         /* owner user id */
        gid_t           va_gid;         /* owner group id */
        u_long          va_fsid;        /* file system id (dev for now) */
        ino_t           va_fileid;      /* file id */
        u_quad_t        va_size;        /* file size in bytes */
        long            va_blocksize;   /* blocksize preferred for i/o */
        struct timespec50 va_atime;     /* time of last access */
        struct timespec50 va_mtime;     /* time of last modification */
        struct timespec50 va_ctime;     /* time file changed */
        struct timespec50 va_birthtime; /* time file created */
        u_long          va_gen;         /* generation number of file */
        u_long          va_flags;       /* flags defined for file */
        uint32_t        va_rdev;        /* device the special file represents */
        u_quad_t        va_bytes;       /* bytes of disk space held by file */
        u_quad_t        va_filerev;     /* file modification number */
        u_int           va_vaflags;     /* operations flags, see below */
        long            va_spare;       /* remain quad aligned */
};

/*
 * XXX: types.  But I don't want to start playing compat games in
 * the userspace namespace too
 */
void
rump_vattr50_to_vattr(const struct vattr *_va50, struct vattr *va)
{
        const struct vattr50 *va50 = (const struct vattr50 *)_va50;

        va->va_type = va50->va_type;
        va->va_mode = va50->va_mode;
        va->va_nlink = va50->va_nlink;
        va->va_uid = va50->va_uid;
        va->va_gid = va50->va_gid;
        va->va_fsid = (long)va50->va_fsid;
        va->va_fileid = va50->va_fileid;
        va->va_size = va50->va_size;
        va->va_blocksize = va50->va_blocksize;
        timespec50_to_timespec(&va50->va_atime, &va->va_atime);
        timespec50_to_timespec(&va50->va_ctime, &va->va_ctime);
        timespec50_to_timespec(&va50->va_mtime, &va->va_mtime);
        timespec50_to_timespec(&va50->va_birthtime, &va->va_birthtime);
        va->va_gen = va50->va_gen;
        va->va_flags = va50->va_flags;
        va->va_rdev = (int32_t)va50->va_rdev;
        va->va_bytes = va50->va_bytes;
        va->va_filerev = va50->va_filerev;
        va->va_vaflags = va50->va_flags;
}

void
rump_vattr_to_vattr50(const struct vattr *va, struct vattr *_va50)
{
        struct vattr50 *va50 = (struct vattr50 *)_va50;

        va50->va_type = va->va_type;
        va50->va_mode = va->va_mode;
        va50->va_nlink = va->va_nlink;
        va50->va_uid = va->va_uid;
        va50->va_gid = va->va_gid;
        va50->va_fsid = (u_long)va->va_fsid;
        va50->va_fileid = va->va_fileid;
        va50->va_size = va->va_size;
        va50->va_blocksize = va->va_blocksize;
        timespec_to_timespec50(&va->va_atime, &va50->va_atime);
        timespec_to_timespec50(&va->va_ctime, &va50->va_ctime);
        timespec_to_timespec50(&va->va_mtime, &va50->va_mtime);
        timespec_to_timespec50(&va->va_birthtime, &va50->va_birthtime);
        va50->va_gen = va->va_gen;
        va50->va_flags = va->va_flags;
        va50->va_rdev = (uint32_t)va->va_rdev;
        va50->va_bytes = va->va_bytes;
        va50->va_filerev = va->va_filerev;
        va50->va_vaflags = va->va_flags;
}