Annotation of sys/arch/mvme88k/mvme88k/disksubr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: disksubr.c,v 1.56 2007/06/20 18:15:46 deraadt Exp $ */
! 2: /*
! 3: * Copyright (c) 1998 Steve Murphree, Jr.
! 4: * Copyright (c) 1995 Dale Rahn.
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. The name of the author may not be used to endorse or promote products
! 16: * derived from this software without specific prior written permission.
! 17: *
! 18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 21: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <sys/param.h>
! 31: #include <sys/systm.h>
! 32: #include <sys/buf.h>
! 33: #include <sys/disklabel.h>
! 34: #include <sys/disk.h>
! 35:
! 36: void bsdtocpulabel(struct disklabel *, struct mvmedisklabel *);
! 37: void cputobsdlabel(struct disklabel *, struct mvmedisklabel *);
! 38:
! 39: /*
! 40: * Attempt to read a disk label from a device
! 41: * using the indicated strategy routine.
! 42: * The label must be partly set up before this:
! 43: * secpercyl and anything required in the strategy routine
! 44: * (e.g., sector size) must be filled in before calling us.
! 45: * Returns NULL on success and an error string on failure.
! 46: */
! 47:
! 48: char *
! 49: readdisklabel(dev_t dev, void (*strat)(struct buf *),
! 50: struct disklabel *lp, int spoofonly)
! 51: {
! 52: struct buf *bp = NULL;
! 53: struct mvmedisklabel *mlp;
! 54: int error;
! 55: char *msg;
! 56:
! 57: if ((msg = initdisklabel(lp)))
! 58: goto done;
! 59:
! 60: /* get a buffer and initialize it */
! 61: bp = geteblk((int)lp->d_secsize);
! 62: bp->b_dev = dev;
! 63:
! 64: /* don't read the on-disk label if we are in spoofed-only mode */
! 65: if (spoofonly)
! 66: goto done;
! 67:
! 68: bp->b_blkno = LABELSECTOR;
! 69: bp->b_bcount = lp->d_secsize;
! 70: bp->b_flags = B_BUSY | B_READ;
! 71: (*strat)(bp);
! 72: error = biowait(bp);
! 73: if (error) {
! 74: msg = "disk label read error";
! 75: goto done;
! 76: }
! 77:
! 78: mlp = (struct mvmedisklabel *)bp->b_data;
! 79: if (mlp->magic1 != DISKMAGIC || mlp->magic2 != DISKMAGIC) {
! 80: msg = "no disk label";
! 81: goto done;
! 82: }
! 83:
! 84: cputobsdlabel(lp, mlp);
! 85: if (dkcksum(lp) == 0)
! 86: goto done;
! 87: msg = "disk label corrupted";
! 88:
! 89: #if defined(CD9660)
! 90: if (iso_disklabelspoof(dev, strat, lp) == 0) {
! 91: msg = NULL;
! 92: goto done;
! 93: }
! 94: #endif
! 95: #if defined(UDF)
! 96: if (udf_disklabelspoof(dev, strat, lp) == 0) {
! 97: msg = NULL;
! 98: goto done;
! 99: }
! 100: #endif
! 101:
! 102: done:
! 103: if (bp) {
! 104: bp->b_flags |= B_INVAL;
! 105: brelse(bp);
! 106: }
! 107: return (msg);
! 108: }
! 109:
! 110: /*
! 111: * Write disk label back to device after modification.
! 112: */
! 113: int
! 114: writedisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp)
! 115: {
! 116: struct buf *bp = NULL;
! 117: int error;
! 118:
! 119: /* get a buffer and initialize it */
! 120: bp = geteblk((int)lp->d_secsize);
! 121: bp->b_dev = dev;
! 122:
! 123: /* Read it in, slap the new label in, and write it back out */
! 124: bp->b_blkno = LABELSECTOR;
! 125: bp->b_bcount = lp->d_secsize;
! 126: bp->b_flags = B_BUSY | B_READ;
! 127: (*strat)(bp);
! 128: if ((error = biowait(bp)) != 0)
! 129: goto done;
! 130:
! 131: bsdtocpulabel(lp, (struct mvmedisklabel *)bp->b_data);
! 132:
! 133: bp->b_flags = B_BUSY | B_WRITE;
! 134: (*strat)(bp);
! 135: error = biowait(bp);
! 136:
! 137: done:
! 138: if (bp) {
! 139: bp->b_flags |= B_INVAL;
! 140: brelse(bp);
! 141: }
! 142: return (error);
! 143: }
! 144:
! 145: void
! 146: bsdtocpulabel(struct disklabel *lp, struct mvmedisklabel *clp)
! 147: {
! 148: char *tmot = "MOTOROLA", *id = "M88K", *mot;
! 149: int i;
! 150:
! 151: clp->magic1 = lp->d_magic;
! 152: clp->type = lp->d_type;
! 153: clp->subtype = lp->d_subtype;
! 154: strncpy(clp->vid_vd, lp->d_typename, 16);
! 155: strncpy(clp->packname, lp->d_packname, 16);
! 156: clp->cfg_psm = lp->d_secsize;
! 157: clp->cfg_spt = lp->d_nsectors;
! 158: clp->cfg_trk = lp->d_ncylinders; /* trk is really num of cyl! */
! 159: clp->cfg_hds = lp->d_ntracks;
! 160:
! 161: clp->secpercyl = lp->d_secpercyl;
! 162: clp->secperunit = DL_GETDSIZE(lp);
! 163: clp->sparespertrack = lp->d_sparespertrack;
! 164: clp->sparespercyl = lp->d_sparespercyl;
! 165: clp->acylinders = lp->d_acylinders;
! 166: clp->rpm = lp->d_rpm;
! 167:
! 168: clp->cfg_ilv = lp->d_interleave;
! 169: clp->cfg_sof = lp->d_trackskew;
! 170: clp->cylskew = lp->d_cylskew;
! 171: clp->headswitch = lp->d_headswitch;
! 172:
! 173: /* this silly table is for winchester drives */
! 174: if (lp->d_trkseek < 6)
! 175: clp->cfg_ssr = 0;
! 176: else if (lp->d_trkseek < 10)
! 177: clp->cfg_ssr = 1;
! 178: else if (lp->d_trkseek < 15)
! 179: clp->cfg_ssr = 2;
! 180: else if (lp->d_trkseek < 20)
! 181: clp->cfg_ssr = 3;
! 182: else
! 183: clp->cfg_ssr = 4;
! 184:
! 185: clp->flags = lp->d_flags;
! 186: for (i = 0; i < NDDATA; i++)
! 187: clp->drivedata[i] = lp->d_drivedata[i];
! 188: for (i = 0; i < NSPARE; i++)
! 189: clp->spare[i] = lp->d_spare[i];
! 190:
! 191: clp->magic2 = lp->d_magic2;
! 192: clp->checksum = lp->d_checksum;
! 193: clp->partitions = lp->d_npartitions;
! 194: clp->bbsize = lp->d_bbsize;
! 195: clp->sbsize = lp->d_sbsize;
! 196: clp->checksum = lp->d_checksum;
! 197: bcopy(&lp->d_partitions[0], clp->vid_4, sizeof(struct partition) * 4);
! 198: bcopy(&lp->d_partitions[4], clp->cfg_4, sizeof(struct partition) * 12);
! 199: clp->version = 2;
! 200:
! 201: /* Put "MOTOROLA" in the VID. This makes it a valid boot disk. */
! 202: for (mot = clp->vid_mot, i = 0; i < 8; i++)
! 203: *mot++ = *tmot++;
! 204:
! 205: /* put volume id in the VID */
! 206: for (mot = clp->vid_id, i = 0; i < 4; i++)
! 207: *mot++ = *id++;
! 208: }
! 209:
! 210: void
! 211: cputobsdlabel(struct disklabel *lp, struct mvmedisklabel *clp)
! 212: {
! 213: int i;
! 214:
! 215: lp->d_magic = clp->magic1;
! 216: lp->d_type = clp->type;
! 217: lp->d_subtype = clp->subtype;
! 218: strncpy(lp->d_typename, clp->vid_vd, sizeof lp->d_typename);
! 219: strncpy(lp->d_packname, clp->packname, sizeof lp->d_packname);
! 220: lp->d_secsize = clp->cfg_psm;
! 221: lp->d_nsectors = clp->cfg_spt;
! 222: lp->d_ncylinders = clp->cfg_trk; /* trk is really num of cyl! */
! 223: lp->d_ntracks = clp->cfg_hds;
! 224:
! 225: lp->d_secpercyl = clp->secpercyl;
! 226: if (DL_GETDSIZE(lp) == 0)
! 227: DL_SETDSIZE(lp, clp->secperunit);
! 228: lp->d_sparespertrack = clp->sparespertrack;
! 229: lp->d_sparespercyl = clp->sparespercyl;
! 230: lp->d_acylinders = clp->acylinders;
! 231: lp->d_rpm = clp->rpm;
! 232: lp->d_interleave = clp->cfg_ilv;
! 233: lp->d_trackskew = clp->cfg_sof;
! 234: lp->d_cylskew = clp->cylskew;
! 235: lp->d_headswitch = clp->headswitch;
! 236:
! 237: /* this silly table is for winchester drives */
! 238: switch (clp->cfg_ssr) {
! 239: case 1:
! 240: lp->d_trkseek = 6;
! 241: break;
! 242: case 2:
! 243: lp->d_trkseek = 10;
! 244: break;
! 245: case 3:
! 246: lp->d_trkseek = 15;
! 247: break;
! 248: case 4:
! 249: lp->d_trkseek = 20;
! 250: break;
! 251: default:
! 252: lp->d_trkseek = 0;
! 253: }
! 254:
! 255: lp->d_flags = clp->flags;
! 256: for (i = 0; i < NDDATA; i++)
! 257: lp->d_drivedata[i] = clp->drivedata[i];
! 258: for (i = 0; i < NSPARE; i++)
! 259: lp->d_spare[i] = clp->spare[i];
! 260:
! 261: lp->d_magic2 = clp->magic2;
! 262: lp->d_npartitions = clp->partitions;
! 263: lp->d_bbsize = clp->bbsize;
! 264: lp->d_sbsize = clp->sbsize;
! 265:
! 266: bcopy(clp->vid_4, &lp->d_partitions[0], sizeof(struct partition) * 4);
! 267: bcopy(clp->cfg_4, &lp->d_partitions[4], sizeof(struct partition) * 12);
! 268:
! 269: if (clp->version < 2) {
! 270: struct __partitionv0 *v0pp = (struct __partitionv0 *)lp->d_partitions;
! 271: struct partition *pp = lp->d_partitions;
! 272:
! 273: for (i = 0; i < lp->d_npartitions; i++, pp++, v0pp++) {
! 274: pp->p_fragblock = DISKLABELV1_FFS_FRAGBLOCK(v0pp->
! 275: p_fsize, v0pp->p_frag);
! 276: pp->p_offseth = 0;
! 277: pp->p_sizeh = 0;
! 278: }
! 279: }
! 280:
! 281: lp->d_version = 1;
! 282: lp->d_checksum = 0;
! 283: lp->d_checksum = dkcksum(lp);
! 284: }
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