/*      $OpenBSD: ofdev.c,v 1.42 2025/11/18 15:24:09 krw Exp $  */
/*      $NetBSD: ofdev.c,v 1.1 2000/08/20 14:58:41 mrg Exp $    */

/*
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
 */
/*
 * Device I/O routines using Open Firmware
 */
#include <sys/param.h>
#include <sys/disklabel.h>
#ifdef NETBOOT
#include <netinet/in.h>
#endif

#include <lib/libkern/funcs.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/ufs.h>
#include <lib/libsa/ufs2.h>
#include <lib/libsa/cd9660.h>
#ifdef NETBOOT
#include <lib/libsa/nfs.h>
#endif

#ifdef SOFTRAID
#include <sys/queue.h>
#include <dev/softraidvar.h>
#include "softraid_sparc64.h"
#include "disk.h"
#endif

#include <dev/sun/disklabel.h>
#include "openfirm.h"
#include "ofdev.h"

/* needed for DISKLABELV1_FFS_FRAGBLOCK */
int      ffs(int);

extern char bootdev[];

/*
 * This is ugly.  A path on a sparc machine is something like this:
 *
 *      [device] [-<options] [path] [-options] [otherstuff] [-<more options]
 *
 */

static char *
filename(char *str, char *ppart)
{
        char *cp, *lp;
        char savec;
        int dhandle;
        char devtype[16];

        lp = str;
        devtype[0] = 0;
        *ppart = 0;
        for (cp = str; *cp; lp = cp) {
                /* For each component of the path name... */
                while (*++cp && *cp != '/');
                savec = *cp;
                *cp = 0;
                /* ...look whether there is a device with this name */
                dhandle = OF_finddevice(str);
                DNPRINTF(BOOT_D_OFDEV, "filename: OF_finddevice(%s) says %x\n",
                    str, dhandle);
                *cp = savec;
                if (dhandle == -1) {
                        /* if not, lp is the delimiter between device and path */
                        /* if the last component was a block device... */
                        if (!strcmp(devtype, "block")) {
                                /* search for arguments */
                                DNPRINTF(BOOT_D_OFDEV, "filename: hunting for "
                                    "arguments in %s\n", str);
                                for (cp = lp;
                                     --cp >= str && *cp != '/' && *cp != '-';);
                                if (cp >= str && *cp == '-') {
                                        /* found arguments, make firmware ignore them */
                                        *cp = 0;
                                        for (cp = lp; *--cp && *cp != ',';)
                                                ;
                                        if (DL_PARTNAME2NUM(*++cp) != -1)
                                                *ppart = *cp;
                                }
                        }
                        DNPRINTF(BOOT_D_OFDEV, "filename: found %s\n", lp);
                        return lp;
                } else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0)
                        devtype[0] = 0;
        }
        DNPRINTF(BOOT_D_OFDEV, "filename: not found\n", lp);
        return 0;
}

int
strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
    size_t *rsize)
{
        struct of_dev *dev = devdata;
        u_quad_t pos;
        int n;

#ifdef SOFTRAID
        /* Intercept strategy for softraid volumes. */
        if (dev->type == OFDEV_SOFTRAID)
                return sr_strategy(bootdev_dip->sr_vol, bootdev_dip->sr_handle,
                    rw, blk, size, buf, rsize);
#endif
        if (dev->type != OFDEV_DISK)
                panic("strategy");

        DNPRINTF(BOOT_D_OFDEV, "strategy: block %lx, partition offset %lx, "
            "blksz %lx\n", (long)blk, (long)dev->partoff, (long)dev->bsize);
        DNPRINTF(BOOT_D_OFDEV, "strategy: seek position should be: %lx\n",
            (long)((blk + dev->partoff) * dev->bsize));
        pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;

        for (;;) {
                DNPRINTF(BOOT_D_OFDEV, "strategy: seeking to %lx\n", (long)pos);
                if (OF_seek(dev->handle, pos) < 0)
                        break;
                DNPRINTF(BOOT_D_OFDEV, "strategy: reading %lx at %p\n",
                    (long)size, buf);
                if (rw == F_READ)
                        n = OF_read(dev->handle, buf, size);
                else
                        n = OF_write(dev->handle, buf, size);
                if (n == -2)
                        continue;
                if (n < 0)
                        break;
                if (rsize)
                        *rsize = n;
                return 0;
        }
        return EIO;
}

static int
devclose(struct open_file *of)
{
        struct of_dev *op = of->f_devdata;

#ifdef NETBOOT
        if (op->type == OFDEV_NET)
                net_close(op);
#endif
#ifdef SOFTRAID
        if (op->type == OFDEV_SOFTRAID) {
                op->handle = -1;
                return 0;
        }
#endif
        OF_close(op->handle);
        op->handle = -1;
        return 0;
}

struct devsw devsw[1] = {
        {
                "OpenFirmware",
                strategy,
                (int (*)(struct open_file *, ...))nodev,
                devclose,
                noioctl
        }
};
int ndevs = sizeof devsw / sizeof devsw[0];

#ifdef SPARC_BOOT_UFS
static struct fs_ops file_system_ufs = {
        ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek,
        ufs_stat, ufs_readdir, ufs_fchmod
};
static struct fs_ops file_system_ufs2 = {
        ufs2_open, ufs2_close, ufs2_read, ufs2_write, ufs2_seek,
        ufs2_stat, ufs2_readdir, ufs2_fchmod
};
#endif
#ifdef SPARC_BOOT_HSFS
static struct fs_ops file_system_cd9660 = {
        cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek,
        cd9660_stat, cd9660_readdir
};
#endif
#ifdef NETBOOT
static struct fs_ops file_system_nfs = {
        nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek,
        nfs_stat, nfs_readdir
};
#endif

struct fs_ops file_system[4];
int nfsys;

static struct of_dev ofdev = {
        -1,
};

char opened_name[256];

/************************************************************************
 *
 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c
 * and then substantially rewritten by Gordon W. Ross
 *
 ************************************************************************/

/* What partition types to assume for Sun disklabels: */
static u_char
sun_fstypes[8] = {
        FS_BSDFFS,      /* a */
        FS_SWAP,        /* b */
        FS_OTHER,       /* c - whole disk */
        FS_BSDFFS,      /* d */
        FS_BSDFFS,      /* e */
        FS_BSDFFS,      /* f */
        FS_BSDFFS,      /* g */
        FS_BSDFFS,      /* h */
};

/*
 * Given a struct sun_disklabel, assume it has an extended partition
 * table and compute the correct value for sl_xpsum.
 */
static __inline u_int
sun_extended_sum(struct sun_disklabel *sl, void *end)
{
        u_int sum, *xp, *ep;

        xp = (u_int *)&sl->sl_xpmag;
        ep = (u_int *)end;

        sum = 0;
        for (; xp < ep; xp++)
                sum += *xp;
        return (sum);
}

/*
 * Given a SunOS disk label, set lp to a BSD disk label.
 * The BSD label is cleared out before this is called.
 */
static int
disklabel_sun_to_bsd(struct sun_disklabel *sl, struct disklabel *lp)
{
        struct sun_preamble *preamble = (struct sun_preamble *)sl;
        struct sun_partinfo *ppp;
        struct sun_dkpart *spp;
        struct partition *npp;
        u_short cksum = 0, *sp1, *sp2;
        int i, secpercyl;

        /* Verify the XOR check. */
        sp1 = (u_short *)sl;
        sp2 = (u_short *)(sl + 1);
        while (sp1 < sp2)
                cksum ^= *sp1++;
        if (cksum != 0)
                return (EINVAL);        /* SunOS disk label, bad checksum */

        /* Format conversion. */
        lp->d_magic = DISKMAGIC;
        lp->d_magic2 = DISKMAGIC;
        lp->d_flags = D_VENDOR;
        memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));

        lp->d_secsize = DEV_BSIZE;
        lp->d_nsectors = sl->sl_nsectors;
        lp->d_ntracks = sl->sl_ntracks;
        lp->d_ncylinders = sl->sl_ncylinders;

        secpercyl = sl->sl_nsectors * sl->sl_ntracks;
        lp->d_secpercyl = secpercyl;
        if (DL_GETDSIZE(lp) == 0)
                DL_SETDSIZE(lp, (u_int64_t)secpercyl * sl->sl_ncylinders);
        lp->d_version = 1;

        memcpy(&lp->d_uid, &sl->sl_uid, sizeof(lp->d_uid));

        lp->d_acylinders = sl->sl_acylinders;

        lp->d_npartitions = MAXPARTITIONS16;

        for (i = 0; i < 8; i++) {
                spp = &sl->sl_part[i];
                npp = &lp->d_partitions[i];
                DL_SETPOFFSET(npp, spp->sdkp_cyloffset * secpercyl);
                DL_SETPSIZE(npp, spp->sdkp_nsectors);
                if (DL_GETPSIZE(npp) == 0) {
                        npp->p_fstype = FS_UNUSED;
                } else {
                        npp->p_fstype = sun_fstypes[i];
                        if (npp->p_fstype == FS_BSDFFS) {
                                /*
                                 * The sun label does not store the FFS fields,
                                 * so just set them with default values here.
                                 */
                                npp->p_fragblock =
                                    DISKLABELV1_FFS_FRAGBLOCK(2048, 8);
                                npp->p_cpg = 16;
                        }
                }
        }

        /* Clear "extended" partition info, tentatively */
        for (i = 0; i < SUNXPART; i++) {
                npp = &lp->d_partitions[i+8];
                DL_SETPOFFSET(npp, 0);
                DL_SETPSIZE(npp, 0);
                npp->p_fstype = FS_UNUSED;
        }

        /* Check to see if there's an "extended" partition table
         * SL_XPMAG partitions had checksums up to just before the
         * (new) sl_types variable, while SL_XPMAGTYP partitions have
         * checksums up to the just before the (new) sl_xxx1 variable.
         * Also, disklabels created prior to the addition of sl_uid will
         * have a checksum to just before the sl_uid variable.
         */
        if ((sl->sl_xpmag == SL_XPMAG &&
            sun_extended_sum(sl, &sl->sl_types) == sl->sl_xpsum) ||
            (sl->sl_xpmag == SL_XPMAGTYP &&
            sun_extended_sum(sl, &sl->sl_uid) == sl->sl_xpsum) ||
            (sl->sl_xpmag == SL_XPMAGTYP &&
            sun_extended_sum(sl, &sl->sl_xxx1) == sl->sl_xpsum)) {
                /*
                 * There is.  Copy over the "extended" partitions.
                 * This code parallels the loop for partitions a-h.
                 */
                for (i = 0; i < SUNXPART; i++) {
                        spp = &sl->sl_xpart[i];
                        npp = &lp->d_partitions[i+8];
                        DL_SETPOFFSET(npp, spp->sdkp_cyloffset * secpercyl);
                        DL_SETPSIZE(npp, spp->sdkp_nsectors);
                        if (DL_GETPSIZE(npp) == 0) {
                                npp->p_fstype = FS_UNUSED;
                                continue;
                        }
                        npp->p_fstype = FS_BSDFFS;
                        npp->p_fragblock =
                            DISKLABELV1_FFS_FRAGBLOCK(2048, 8);
                        npp->p_cpg = 16;
                }
                if (sl->sl_xpmag == SL_XPMAGTYP) {
                        for (i = 0; i < MAXPARTITIONS16; i++) {
                                npp = &lp->d_partitions[i];
                                npp->p_fstype = sl->sl_types[i];
                                npp->p_fragblock = sl->sl_fragblock[i];
                                npp->p_cpg = sl->sl_cpg[i];
                        }
                }
        } else if (preamble->sl_nparts <= 8) {
                /*
                 * A more traditional Sun label.  Recognise certain filesystem
                 * types from it, if they are available.
                 */
                i = preamble->sl_nparts;
                if (i == 0)
                        i = 8;

                npp = &lp->d_partitions[i-1];
                ppp = &preamble->sl_part[i-1];
                for (; i > 0; i--, npp--, ppp--) {
                        if (npp->p_size == 0)
                                continue;
                        if ((ppp->spi_tag == 0) && (ppp->spi_flag == 0))
                                continue;

                        switch (ppp->spi_tag) {
                        case SPTAG_SUNOS_ROOT:
                        case SPTAG_SUNOS_USR:
                        case SPTAG_SUNOS_VAR:
                        case SPTAG_SUNOS_HOME:
                                npp->p_fstype = FS_BSDFFS;
                                npp->p_fragblock =
                                    DISKLABELV1_FFS_FRAGBLOCK(2048, 8);
                                npp->p_cpg = 16;
                                break;
                        case SPTAG_LINUX_EXT2:
                                npp->p_fstype = FS_EXT2FS;
                                break;
                        default:
                                /* FS_SWAP for _SUNOS_SWAP and _LINUX_SWAP? */
                                npp->p_fstype = FS_UNUSED;
                                break;
                        }
                }
        }

        lp->d_checksum = 0;
        lp->d_checksum = dkcksum(lp);
        DNPRINTF(BOOT_D_OFDEV, "disklabel_sun_to_bsd: success!\n");
        return (0);
}

/*
 * Find a valid disklabel.
 */
static char *
search_label(struct of_dev *devp, u_long off, char *buf, struct disklabel *lp,
    u_long off0)
{
        struct disklabel *dlp;
        struct sun_disklabel *slp;
        size_t read;

        /* minimal requirements for archetypal disk label */
        if (DL_GETDSIZE(lp) == 0)
                DL_SETDSIZE(lp, 0x1fffffff);
        lp->d_npartitions = MAXPARTITIONS16;
        if (DL_GETPSIZE(&lp->d_partitions[0]) == 0)
                DL_SETPSIZE(&lp->d_partitions[0], 0x1fffffff);
        DL_SETPOFFSET(&lp->d_partitions[0], 0);

        if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
            || read != DEV_BSIZE)
                return ("Cannot read label");

        /* Check for a disk label. */
        dlp = (struct disklabel *) (buf + LABELOFFSET);
        if (dlp->d_magic == DISKMAGIC) {
                if (dkcksum(dlp))
                        return ("corrupt disk label");
                *lp = *dlp;
                DNPRINTF(BOOT_D_OFDEV, "search_label: found disk label\n");
                return (NULL);
        }

        /* Check for a Sun disk label (for PROM compatibility). */
        slp = (struct sun_disklabel *)buf;
        if (slp->sl_magic == SUN_DKMAGIC) {
                if (disklabel_sun_to_bsd(slp, lp) != 0)
                        return ("corrupt disk label");
                DNPRINTF(BOOT_D_OFDEV, "search_label: found disk label\n");
                return (NULL);
        }

        return ("no disk label");
}

int
load_disklabel(struct of_dev *ofdev, struct disklabel *label)
{
        char buf[DEV_BSIZE];
        size_t read;
        int error = 0;
        char *errmsg = NULL;

        DNPRINTF(BOOT_D_OFDEV, "load_disklabel: trying to read disklabel\n");
        if (strategy(ofdev, F_READ,
                     LABELSECTOR, DEV_BSIZE, buf, &read) != 0
            || read != DEV_BSIZE
            || (errmsg = getdisklabel(buf, label))) {
#ifdef BOOT_DEBUG
                if (errmsg)
                        DNPRINTF(BOOT_D_OFDEV,
                            "load_disklabel: getdisklabel says %s\n", errmsg);
#endif
                errmsg = search_label(ofdev, LABELSECTOR, buf, label, 0);
                if (errmsg) {
                        printf("load_disklabel: search_label says %s\n",
                            errmsg);
                        error = ERDLAB;
                }
        }

        return (error);
}

int
devopen(struct open_file *of, const char *name, char **file)
{
        char *cp;
        char partition;
        char fname[256];
        char buf[DEV_BSIZE];
        struct disklabel label;
        int dhandle, ihandle, part, parent;
        int error = 0;
#ifdef SOFTRAID
        char volno;
#endif

        nfsys = 0;
        if (ofdev.handle != -1)
                panic("devopen");
        DNPRINTF(BOOT_D_OFDEV, "devopen: you want %s\n", name);
        if (strlcpy(fname, name, sizeof fname) >= sizeof fname)
                return ENAMETOOLONG;
#ifdef SOFTRAID
        if (bootdev_dip) {
                if (fname[0] == 's' && fname[1] == 'r' &&
                    '0' <= fname[2] && fname[2] <= '9') {
                        /* We only support read-only softraid. */
                        of->f_flags |= F_NOWRITE;

                        volno = fname[2];
                        if (DL_PARTNUM2NAME(fname[3]) != -1) {
                                partition = fname[3];
                                if (fname[4] == ':')
                                        cp = &fname[5];
                                else
                                        cp = &fname[4];
                        } else {
                                partition = 'a';
                                cp = &fname[3];
                        }
                } else {
                        volno = '0';
                        partition = 'a';
                        cp = &fname[0];
                }
                snprintf(buf, sizeof buf, "sr%c%c:", volno, partition);
                if (strlcpy(opened_name, buf, sizeof opened_name)
                    >= sizeof opened_name)
                        return ENAMETOOLONG;
                *file = opened_name + strlen(opened_name);
                if (!*cp) {
                        if (strlcpy(buf, DEFAULT_KERNEL, sizeof buf)
                            >= sizeof buf)
                                return ENAMETOOLONG;
                } else {
                        if (snprintf(buf, sizeof buf, "%s%s",
                            *cp == '/' ? "" : "/", cp) >= sizeof buf)
                                return ENAMETOOLONG;
                }
                if (strlcat(opened_name, buf, sizeof opened_name) >=
                    sizeof opened_name)
                        return ENAMETOOLONG;
        } else {
#endif
                cp = filename(fname, &partition);
                if (cp) {
                        if (strlcpy(buf, cp, sizeof buf) >= sizeof buf)
                                return ENAMETOOLONG;
                        *cp = 0;
                }
                if (!cp || !*buf) {
                        if (strlcpy(buf, DEFAULT_KERNEL, sizeof buf)
                            >= sizeof buf)
                                return ENAMETOOLONG;
                }
                if (!*fname) {
                        if (strlcpy(fname, bootdev, sizeof fname)
                            >= sizeof fname)
                                return ENAMETOOLONG;
                }
                if (strlcpy(opened_name, fname,
                    partition ? (sizeof opened_name) - 2 : sizeof opened_name)
                    >= sizeof opened_name)
                        return ENAMETOOLONG;
                if (partition) {
                        cp = opened_name + strlen(opened_name);
                        *cp++ = ':';
                        *cp++ = partition;
                        *cp = 0;
                }
                if (*buf != '/') {
                        if (strlcat(opened_name, "/", sizeof opened_name) >=
                            sizeof opened_name)
                                return ENAMETOOLONG;
                }
                if (strlcat(opened_name, buf, sizeof opened_name) >=
                    sizeof opened_name)
                        return ENAMETOOLONG;
                *file = opened_name + strlen(fname) + 1;
#ifdef SOFTRAID
        }
#endif
        DNPRINTF(BOOT_D_OFDEV, "devopen: trying %s\n", fname);
#ifdef SOFTRAID
        if (bootdev_dip) {
                /* Redirect to the softraid boot volume. */
                struct partition *pp;

                bzero(&ofdev, sizeof ofdev);
                ofdev.type = OFDEV_SOFTRAID;

                if (partition) {
                        part = DL_PARTNAME2NUM(partition);
                        if (part == -1) {
                                printf("invalid partition '%c'\n", partition);
                                return EINVAL;
                        }
                        pp = &bootdev_dip->disklabel.d_partitions[part];
                        if (pp->p_fstype == FS_UNUSED || pp->p_size == 0) {
                                printf("invalid partition '%c'\n", partition);
                                return EINVAL;
                        }
                        bootdev_dip->sr_vol->sbv_part = partition;
                } else
                        bootdev_dip->sr_vol->sbv_part = 'a';

                of->f_dev = devsw;
                of->f_devdata = &ofdev;

#ifdef SPARC_BOOT_UFS
                bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]);
                bcopy(&file_system_ufs2, &file_system[nfsys++], sizeof file_system[0]);
#else
#error "-DSOFTRAID requires -DSPARC_BOOT_UFS"
#endif
                return 0;
        }
#endif
        if ((dhandle = OF_finddevice(fname)) == -1)
                return ENOENT;

        DNPRINTF(BOOT_D_OFDEV, "devopen: found %s\n", fname);
        if (OF_getprop(dhandle, "name", buf, sizeof buf) < 0)
                return ENXIO;
        DNPRINTF(BOOT_D_OFDEV, "devopen: %s is called %s\n", fname, buf);
        if (OF_getprop(dhandle, "device_type", buf, sizeof buf) < 0)
                return ENXIO;
        DNPRINTF(BOOT_D_OFDEV, "devopen: %s is a %s device\n", fname, buf);
        DNPRINTF(BOOT_D_OFDEV, "devopen: opening %s\n", fname);
        if ((ihandle = OF_open(fname)) == -1) {
                DNPRINTF(BOOT_D_OFDEV, "devopen: open of %s failed\n", fname);
                return ENXIO;
        }
        DNPRINTF(BOOT_D_OFDEV, "devopen: %s is now open\n", fname);
        bzero(&ofdev, sizeof ofdev);
        ofdev.handle = ihandle;
        ofdev.type = OFDEV_DISK;
        ofdev.bsize = DEV_BSIZE;
        if (!strcmp(buf, "block")) {
                error = load_disklabel(&ofdev, &label);
                if (error && error != ERDLAB)
                        goto bad;
                else if (error == ERDLAB) {
                        if (partition)
                                /* User specified a partition, but there is none */
                                goto bad;
                        /* No, label, just use complete disk */
                        ofdev.partoff = 0;
                } else {
                        part = partition ? DL_PARTNAME2NUM(partition) : 0;
                        ofdev.partoff = label.d_partitions[part].p_offset;
                        DNPRINTF(BOOT_D_OFDEV, "devopen: setting partition %d "
                            "offset %x\n", part, ofdev.partoff);
                }

                of->f_dev = devsw;
                of->f_devdata = &ofdev;

                /* Some PROMS have buggy writing code for IDE block devices */
                parent = OF_parent(dhandle);
                if (parent && OF_getprop(parent, "device_type", buf,
                    sizeof(buf)) > 0 && strcmp(buf, "ide") == 0) {
                        DNPRINTF(BOOT_D_OFDEV,
                            "devopen: Disable writing for IDE block device\n");
                        of->f_flags |= F_NOWRITE;
                }

#ifdef SPARC_BOOT_UFS
                bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]);
                bcopy(&file_system_ufs2, &file_system[nfsys++], sizeof file_system[0]);
#endif
#ifdef SPARC_BOOT_HSFS
                bcopy(&file_system_cd9660, &file_system[nfsys++],
                    sizeof file_system[0]);
#endif
                DNPRINTF(BOOT_D_OFDEV, "devopen: return 0\n");
                return 0;
        }
#ifdef NETBOOT
        if (!strcmp(buf, "network")) {
                ofdev.type = OFDEV_NET;
                of->f_dev = devsw;
                of->f_devdata = &ofdev;
                bcopy(&file_system_nfs, file_system, sizeof file_system[0]);
                nfsys = 1;
                if ((error = net_open(&ofdev)))
                        goto bad;
                return 0;
        }
#endif
        error = EFTYPE;
bad:
        DNPRINTF(BOOT_D_OFDEV, "devopen: error %d, cannot open device\n",
            error);
        OF_close(ihandle);
        ofdev.handle = -1;
        return error;
}