/*      $NetBSD: ffs_bswap.c,v 1.28 2004/05/25 14:54:59 hannken Exp $   */

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 1998 Manuel Bouyer.
 *
 * 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/param.h>
#if defined(_KERNEL)
#include <sys/systm.h>
#endif

#if !defined(_KERNEL)
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif

#include <ufs/ufs/dinode.h>
#include "ffs/ufs_bswap.h"
#include <ufs/ffs/fs.h>
#include "ffs/ffs_extern.h"

#define fs_old_postbloff        fs_spare5[0]
#define fs_old_rotbloff         fs_spare5[1]
#define fs_old_postbl_start     fs_maxbsize
#define fs_old_headswitch       fs_id[0]
#define fs_old_trkseek  fs_id[1]
#define fs_old_csmask   fs_spare1[0]
#define fs_old_csshift  fs_spare1[1]

#define FS_42POSTBLFMT          -1      /* 4.2BSD rotational table format */
#define FS_DYNAMICPOSTBLFMT     1       /* dynamic rotational table format */

void ffs_csum_swap(struct csum *o, struct csum *n, int size);
void ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n);

void
ffs_sb_swap(struct fs *o, struct fs *n)
{
        size_t i;
        u_int32_t *o32, *n32;

        /*
         * In order to avoid a lot of lines, as the first N fields (52)
         * of the superblock up to fs_fmod are u_int32_t, we just loop
         * here to convert them.
         */
        o32 = (u_int32_t *)o;
        n32 = (u_int32_t *)n;
        for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++)
                n32[i] = bswap32(o32[i]);

        n->fs_swuid = bswap64(o->fs_swuid);
        n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */
        n->fs_old_cpc = bswap32(o->fs_old_cpc);

        /* These fields overlap with a possible location for the
         * historic FS_DYNAMICPOSTBLFMT postbl table, and with the
         * first half of the historic FS_42POSTBLFMT postbl table.
         */
        n->fs_maxbsize = bswap32(o->fs_maxbsize);
        n->fs_sblockloc = bswap64(o->fs_sblockloc);
        ffs_csumtotal_swap(&o->fs_cstotal, &n->fs_cstotal);
        n->fs_time = bswap64(o->fs_time);
        n->fs_size = bswap64(o->fs_size);
        n->fs_dsize = bswap64(o->fs_dsize);
        n->fs_csaddr = bswap64(o->fs_csaddr);
        n->fs_pendingblocks = bswap64(o->fs_pendingblocks);
        n->fs_pendinginodes = bswap32(o->fs_pendinginodes);

        /* These fields overlap with the second half of the
         * historic FS_42POSTBLFMT postbl table
         */
        for (i = 0; i < FSMAXSNAP; i++)
                n->fs_snapinum[i] = bswap32(o->fs_snapinum[i]);
        n->fs_avgfilesize = bswap32(o->fs_avgfilesize);
        n->fs_avgfpdir = bswap32(o->fs_avgfpdir);
        /* fs_sparecon[28] - ignore for now */
        n->fs_flags = bswap32(o->fs_flags);
        n->fs_contigsumsize = bswap32(o->fs_contigsumsize);
        n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen);
        n->fs_old_inodefmt = bswap32(o->fs_old_inodefmt);
        n->fs_maxfilesize = bswap64(o->fs_maxfilesize);
        n->fs_qbmask = bswap64(o->fs_qbmask);
        n->fs_qfmask = bswap64(o->fs_qfmask);
        n->fs_state = bswap32(o->fs_state);
        n->fs_old_postblformat = bswap32(o->fs_old_postblformat);
        n->fs_old_nrpos = bswap32(o->fs_old_nrpos);
        n->fs_old_postbloff = bswap32(o->fs_old_postbloff);
        n->fs_old_rotbloff = bswap32(o->fs_old_rotbloff);

        n->fs_magic = bswap32(o->fs_magic);
}

void
ffs_dinode1_swap(struct ufs1_dinode *o, struct ufs1_dinode *n)
{

        n->di_mode = bswap16(o->di_mode);
        n->di_nlink = bswap16(o->di_nlink);
        n->di_size = bswap64(o->di_size);
        n->di_atime = bswap32(o->di_atime);
        n->di_atimensec = bswap32(o->di_atimensec);
        n->di_mtime = bswap32(o->di_mtime);
        n->di_mtimensec = bswap32(o->di_mtimensec);
        n->di_ctime = bswap32(o->di_ctime);
        n->di_ctimensec = bswap32(o->di_ctimensec);
        memcpy(n->di_db, o->di_db, sizeof(n->di_db));
        memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib));
        n->di_flags = bswap32(o->di_flags);
        n->di_blocks = bswap32(o->di_blocks);
        n->di_gen = bswap32(o->di_gen);
        n->di_uid = bswap32(o->di_uid);
        n->di_gid = bswap32(o->di_gid);
}

void
ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n)
{
        n->di_mode = bswap16(o->di_mode);
        n->di_nlink = bswap16(o->di_nlink);
        n->di_uid = bswap32(o->di_uid);
        n->di_gid = bswap32(o->di_gid);
        n->di_blksize = bswap32(o->di_blksize);
        n->di_size = bswap64(o->di_size);
        n->di_blocks = bswap64(o->di_blocks);
        n->di_atime = bswap64(o->di_atime);
        n->di_atimensec = bswap32(o->di_atimensec);
        n->di_mtime = bswap64(o->di_mtime);
        n->di_mtimensec = bswap32(o->di_mtimensec);
        n->di_ctime = bswap64(o->di_ctime);
        n->di_ctimensec = bswap32(o->di_ctimensec);
        n->di_birthtime = bswap64(o->di_ctime);
        n->di_birthnsec = bswap32(o->di_ctimensec);
        n->di_gen = bswap32(o->di_gen);
        n->di_kernflags = bswap32(o->di_kernflags);
        n->di_flags = bswap32(o->di_flags);
        n->di_extsize = bswap32(o->di_extsize);
        memcpy(n->di_extb, o->di_extb, sizeof(n->di_extb));
        memcpy(n->di_db, o->di_db, sizeof(n->di_db));
        memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib));
}

void
ffs_csum_swap(struct csum *o, struct csum *n, int size)
{
        size_t i;
        u_int32_t *oint, *nint;

        oint = (u_int32_t*)o;
        nint = (u_int32_t*)n;

        for (i = 0; i < size / sizeof(u_int32_t); i++)
                nint[i] = bswap32(oint[i]);
}

void
ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n)
{
        n->cs_ndir = bswap64(o->cs_ndir);
        n->cs_nbfree = bswap64(o->cs_nbfree);
        n->cs_nifree = bswap64(o->cs_nifree);
        n->cs_nffree = bswap64(o->cs_nffree);
}

/*
 * Note that ffs_cg_swap may be called with o == n.
 */
void
ffs_cg_swap(struct cg *o, struct cg *n, struct fs *fs)
{
        int i;
        u_int32_t *n32, *o32;
        u_int16_t *n16, *o16;
        int32_t btotoff, boff, clustersumoff;

        n->cg_firstfield = bswap32(o->cg_firstfield);
        n->cg_magic = bswap32(o->cg_magic);
        n->cg_old_time = bswap32(o->cg_old_time);
        n->cg_cgx = bswap32(o->cg_cgx);
        n->cg_old_ncyl = bswap16(o->cg_old_ncyl);
        n->cg_old_niblk = bswap16(o->cg_old_niblk);
        n->cg_ndblk = bswap32(o->cg_ndblk);
        n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir);
        n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree);
        n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree);
        n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree);
        n->cg_rotor = bswap32(o->cg_rotor);
        n->cg_frotor = bswap32(o->cg_frotor);
        n->cg_irotor = bswap32(o->cg_irotor);
        for (i = 0; i < MAXFRAG; i++)
                n->cg_frsum[i] = bswap32(o->cg_frsum[i]);
        
        n->cg_old_btotoff = bswap32(o->cg_old_btotoff);
        n->cg_old_boff = bswap32(o->cg_old_boff);
        n->cg_iusedoff = bswap32(o->cg_iusedoff);
        n->cg_freeoff = bswap32(o->cg_freeoff);
        n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff);
        n->cg_clustersumoff = bswap32(o->cg_clustersumoff);
        n->cg_clusteroff = bswap32(o->cg_clusteroff);
        n->cg_nclusterblks = bswap32(o->cg_nclusterblks);
        n->cg_niblk = bswap32(o->cg_niblk);
        n->cg_initediblk = bswap32(o->cg_initediblk);
        n->cg_time = bswap64(o->cg_time);

        if (fs->fs_magic == FS_UFS2_MAGIC)
                return;

        if (n->cg_magic == CG_MAGIC) {
                btotoff = n->cg_old_btotoff;
                boff = n->cg_old_boff;
                clustersumoff = n->cg_clustersumoff;
        } else {
                btotoff = bswap32(n->cg_old_btotoff);
                boff = bswap32(n->cg_old_boff);
                clustersumoff = bswap32(n->cg_clustersumoff);
        }
        n32 = (u_int32_t *)((u_int8_t *)n + btotoff);
        o32 = (u_int32_t *)((u_int8_t *)o + btotoff);
        n16 = (u_int16_t *)((u_int8_t *)n + boff);
        o16 = (u_int16_t *)((u_int8_t *)o + boff);

        for (i = 0; i < fs->fs_old_cpg; i++)
                n32[i] = bswap32(o32[i]);
        
        for (i = 0; i < fs->fs_old_cpg * fs->fs_old_nrpos; i++)
                n16[i] = bswap16(o16[i]);

        n32 = (u_int32_t *)((u_int8_t *)n + clustersumoff);
        o32 = (u_int32_t *)((u_int8_t *)o + clustersumoff);
        for (i = 1; i < fs->fs_contigsumsize + 1; i++)
                n32[i] = bswap32(o32[i]);
}