[src/trunk]: src/sys/arch/atari/dev If the floppy has no label, fake one.

[leo <leo%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/016488b88cd9
branches:  trunk
changeset: 472667:016488b88cd9
user:      leo <leo%NetBSD.org@localhost>
date:      Tue May 04 14:29:44 1999 +0000

description:
If the floppy has no label, fake one.

diffstat:

 sys/arch/atari/dev/hdfd.c |  119 +++++++++++++++++++++++++++++++++++----------
 1 files changed, 92 insertions(+), 27 deletions(-)

diffs (152 lines):

diff -r dbd308f0925a -r 016488b88cd9 sys/arch/atari/dev/hdfd.c
--- a/sys/arch/atari/dev/hdfd.c Tue May 04 14:16:15 1999 +0000
+++ b/sys/arch/atari/dev/hdfd.c Tue May 04 14:29:44 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: hdfd.c,v 1.13 1998/11/20 12:58:13 leo Exp $    */
+/*     $NetBSD: hdfd.c,v 1.14 1999/05/04 14:29:44 leo Exp $    */
 
 /*-
  * Copyright (c) 1996 Leo Weppelman
@@ -265,6 +265,10 @@
 void   fdfinish __P((struct fd_softc *fd, struct buf *bp));
 int    fdformat __P((dev_t, struct ne7_fd_formb *, struct proc *));
 
+static void    fdgetdisklabel __P((struct fd_softc *, dev_t));
+static void    fdgetdefaultlabel __P((struct fd_softc *, struct disklabel *,
+                   int));
+
 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t));
 
 int
@@ -1297,7 +1301,6 @@
 {
        struct fd_softc         *fd;
        struct disklabel        buffer;
-       struct cpu_disklabel    cpulab;
        int                     error;
        struct fdformat_parms   *form_parms;
        struct fdformat_cmd     *form_cmd;
@@ -1310,32 +1313,16 @@
 
        switch (cmd) {
        case DIOCGDINFO:
-               bzero(&buffer, sizeof(buffer));
-               bzero(&cpulab, sizeof(cpulab));
-
-               buffer.d_secpercyl  = fd->sc_type->seccyl;
-               buffer.d_type       = DTYPE_FLOPPY;
-               buffer.d_secsize    = FDC_BSIZE;
-               buffer.d_secperunit = fd->sc_type->size;
-
-               if (readdisklabel(dev, fdstrategy, &buffer, &cpulab) != NULL)
-                       return EINVAL;
+               fdgetdisklabel(fd, dev);
+               *(struct disklabel *)addr = *(fd->sc_dk.dk_label);
+               return 0;
 
-               if ((FDC_BSIZE * fd->sc_type->size)
-                       < (buffer.d_secsize * buffer.d_secperunit)) {
-                       /*
-                        * XXX: Ignore these fields. If you drop a vnddisk
-                        *      on more than one floppy, you'll get disturbing
-                        *      sounds!
-                        */
-                       buffer.d_secpercyl  = fd->sc_type->seccyl;
-                       buffer.d_type       = DTYPE_FLOPPY;
-                       buffer.d_secsize    = FDC_BSIZE;
-                       buffer.d_secperunit = fd->sc_type->size;
-               }
-
-               *(struct disklabel *)addr = buffer;
-               return 0;
+       case DIOCGPART:
+               fdgetdisklabel(fd, dev);
+               ((struct partinfo *)addr)->disklab = fd->sc_dk.dk_label;
+               ((struct partinfo *)addr)->part =
+                             &fd->sc_dk.dk_label->d_partitions[RAW_PART];
+               return(0);
 
        case DIOCWLABEL:
                if ((flag & FWRITE) == 0)
@@ -1542,3 +1529,81 @@
        free(bp, M_TEMP);
        return rv;
 }
+
+
+/*
+ * Obtain a disklabel. Either a real one from the disk or, if there
+ * is none, a fake one.
+ */
+static void
+fdgetdisklabel(fd, dev)
+struct fd_softc *fd;
+dev_t          dev;
+{
+       struct disklabel        *lp;
+       struct cpu_disklabel    cpulab;
+
+       lp   = fd->sc_dk.dk_label;
+
+       bzero(lp, sizeof(*lp));
+       bzero(&cpulab, sizeof(cpulab));
+
+       lp->d_secpercyl  = fd->sc_type->seccyl;
+       lp->d_type       = DTYPE_FLOPPY;
+       lp->d_secsize    = FDC_BSIZE;
+       lp->d_secperunit = fd->sc_type->size;
+
+       /*
+        * If there is no label on the disk: fake one
+        */
+       if (readdisklabel(dev, fdstrategy, lp, &cpulab) != NULL)
+               fdgetdefaultlabel(fd, lp, RAW_PART);
+
+       if ((FDC_BSIZE * fd->sc_type->size)
+               < (lp->d_secsize * lp->d_secperunit)) {
+               /*
+                * XXX: Ignore these fields. If you drop a vnddisk
+                *      on more than one floppy, you'll get disturbing
+                *      sounds!
+                */
+               lp->d_secpercyl  = fd->sc_type->seccyl;
+               lp->d_type       = DTYPE_FLOPPY;
+               lp->d_secsize    = FDC_BSIZE;
+               lp->d_secperunit = fd->sc_type->size;
+       }
+}
+
+/*
+ * Build defaultdisk label. For now we only create a label from what we
+ * know from 'sc'.
+ */
+static void
+fdgetdefaultlabel(fd, lp, part)
+       struct fd_softc  *fd;
+       struct disklabel *lp;
+       int part;
+{
+       bzero(lp, sizeof(struct disklabel));
+
+       lp->d_secsize     = 128 * (1 << fd->sc_type->secsize);
+       lp->d_ntracks     = fd->sc_type->heads;
+       lp->d_nsectors    = fd->sc_type->sectrac;
+       lp->d_secpercyl   = lp->d_ntracks * lp->d_nsectors;
+       lp->d_ncylinders  = fd->sc_type->size / lp->d_secpercyl;
+       lp->d_secperunit  = fd->sc_type->size;
+
+       lp->d_type        = DTYPE_FLOPPY;
+       lp->d_rpm         = 300;        /* good guess I suppose.        */
+       lp->d_interleave  = 1;          /* FIXME: is this OK?           */
+       lp->d_bbsize      = 0;
+       lp->d_sbsize      = 0;
+       lp->d_npartitions = part + 1;
+       lp->d_trkseek     = 6000;       /* Who cares...                 */
+       lp->d_magic       = DISKMAGIC;
+       lp->d_magic2      = DISKMAGIC;
+       lp->d_checksum    = dkcksum(lp);
+       lp->d_partitions[part].p_size   = lp->d_secperunit;
+       lp->d_partitions[part].p_fstype = FS_UNUSED;
+       lp->d_partitions[part].p_fsize  = 1024;
+       lp->d_partitions[part].p_frag   = 8;
+}