-/* $OpenBSD: cd9660_vfsops.c,v 1.2 1996/02/29 10:12:26 niklas Exp $ */
+/* $OpenBSD: cd9660_vfsops.c,v 1.3 1996/12/05 13:08:11 deraadt Exp $ */
/* $NetBSD: cd9660_vfsops.c,v 1.20 1996/02/09 21:32:08 christos Exp $ */
/*-
#include <sys/malloc.h>
#include <sys/stat.h>
+#define b_cylin b_resid
+
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/iso_rrip.h>
#include <isofs/cd9660/cd9660_node.h>
static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
struct proc *p, struct iso_args *argp));
+int iso_disklabelspoof __P((dev_t dev, void (*strat) __P((struct buf *)),
+ struct disklabel *lp));
int
cd9660_mountroot()
return error;
}
+/*
+ * Test to see if the device is an ISOFS filesystem.
+ */
+int
+iso_disklabelspoof(dev, strat, lp)
+ dev_t dev;
+ void (*strat) __P((struct buf *));
+ register struct disklabel *lp;
+{
+ struct buf *bp = NULL;
+ struct iso_volume_descriptor *vdp;
+ struct iso_primary_descriptor *pri;
+ int logical_block_size;
+ int iso_blknum;
+
+ bp = geteblk(ISO_DEFAULT_BLOCK_SIZE);
+ bp->b_dev = dev;
+
+ for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
+ bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE);
+ bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE;
+ bp->b_flags = B_BUSY | B_READ;
+ bp->b_cylin = bp->b_blkno / lp->d_secpercyl;
+
+ /*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n",
+ lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/
+
+ (*strat)(bp);
+
+ if (biowait(bp))
+ goto out;
+
+ vdp = (struct iso_volume_descriptor *)bp->b_data;
+ /*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1],
+ vdp->id[2], isonum_711(vdp->type));*/
+ if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 ||
+ isonum_711 (vdp->type) == ISO_VD_END)
+ goto out;
+
+ if (isonum_711 (vdp->type) == ISO_VD_PRIMARY)
+ break;
+ }
+
+ if (isonum_711 (vdp->type) != ISO_VD_PRIMARY)
+ goto out;
+
+ pri = (struct iso_primary_descriptor *)vdp;
+ logical_block_size = isonum_723 (pri->logical_block_size);
+ if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE ||
+ (logical_block_size & (logical_block_size - 1)) != 0)
+ goto out;
+
+ /*
+ * build a disklabel for the CD
+ */
+ lp->d_partitions[0].p_offset = 0;
+ lp->d_partitions[0].p_size = lp->d_secperunit;
+ lp->d_partitions[0].p_fstype = FS_ISO9660;
+ lp->d_partitions[RAW_PART].p_offset = 0;
+ lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
+ lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660;
+ lp->d_npartitions = RAW_PART + 1;
+ lp->d_bbsize = 8192; /* fake */
+ lp->d_sbsize = 64*1024; /* fake */
+
+ lp->d_magic = DISKMAGIC;
+ lp->d_magic2 = DISKMAGIC;
+ lp->d_checksum = dkcksum(lp);
+ bp->b_flags |= B_INVAL;
+ brelse(bp);
+ return (0);
+
+out:
+ bp->b_flags |= B_INVAL;
+ brelse(bp);
+ return (EINVAL);
+}
+
/*
* Make a filesystem operational.
* Nothing to do at the moment.