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Retain some of the RAID5 texts even in the non-RAID5 versions.

Browse source 
Previously, accidentally starting the wrong version could corrupt
  the RAID5 configuration.

  Add functions Volno, Plexno and Sdno to replace the old defines
  VOLNO, PLEXNO and SDNO.
This commit is contained in:
Greg Lehey 1999-01-21 00:41:31 +00:00
parent 8a2cba6003
commit 5d6f3129b1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=42943
1 changed files with 67 additions and 1 deletions
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68
sys/dev/vinum/vinumutil.c
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@ -33,7 +33,7 @@
* otherwise) arising in any way out of the use of this software, even if * otherwise) arising in any way out of the use of this software, even if
* advised of the possibility of such damage. * advised of the possibility of such damage.
* *
* $Id: util.c,v 1.3 1998/12/28 04:56:24 peter Exp $ * $Id: vinumutil.c,v 1.10 1999/01/02 00:39:04 grog Exp grog $
*/ */
/* This file contains utility routines used both in kernel and user context */ /* This file contains utility routines used both in kernel and user context */
@ -100,6 +100,9 @@ plex_org(enum plexorg org)
return "striped"; return "striped";
break; break;
case plex_raid5: /* RAID5 plex */
return "raid5";
break;
default: default:
sprintf(numeric_state, "Invalid org %d", (int) org); sprintf(numeric_state, "Invalid org %d", (int) org);
@ -212,3 +215,66 @@ sizespec(char *spec)
/* NOTREACHED */ /* NOTREACHED */
return -1; return -1;
} }
/* Extract the volume number from a device number.
* Perform no checking. */
int
Volno(dev_t dev)
{
int x = (int) dev;
return (x & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT;
}
/* Extract a plex number from a device number.
* Don't check the major number, but check the
* type. Return -1 for invalid types. */
int
Plexno(dev_t dev)
{
int x = (int) dev;
switch (DEVTYPE(dev)) {
case VINUM_VOLUME_TYPE:
case VINUM_DRIVE_TYPE:
case VINUM_SUPERDEV_TYPE:
case VINUM_RAWSD_TYPE:
return -1;
case VINUM_PLEX_TYPE:
case VINUM_SD_TYPE:
return VOL[Volno(x)].plex[(x >> VINUM_PLEX_SHIFT) & (MASK(VINUM_PLEX_WIDTH))];
case VINUM_RAWPLEX_TYPE:
return ((x & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
|((x >> VINUM_RAWPLEX_SHIFT)
& (MASK(VINUM_RAWPLEX_WIDTH)
<< (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */
}
return 0; /* compiler paranoia */
}
/* Extract a subdisk number from a device number.
* Don't check the major number, but check the
* type. Return -1 for invalid types. */
int
Sdno(dev_t dev)
{
int x = (int) dev;
switch (DEVTYPE(dev)) {
case VINUM_VOLUME_TYPE:
case VINUM_DRIVE_TYPE:
case VINUM_SUPERDEV_TYPE:
case VINUM_PLEX_TYPE:
case VINUM_RAWPLEX_TYPE:
return -1;
case VINUM_SD_TYPE:
return PLEX[Plexno(x)].sdnos[(x >> VINUM_SD_SHIFT) & (MASK(VINUM_SD_WIDTH))];
case VINUM_RAWSD_TYPE:
return ((x & MASK(VINUM_VOL_WIDTH)) >> VINUM_VOL_SHIFT) /* low order 8 bits */
|((x >> VINUM_RAWPLEX_SHIFT) & (MASK(VINUM_RAWPLEX_WIDTH) << (VINUM_VOL_SHIFT + VINUM_VOL_WIDTH))); /* upper 12 bits */
}
return -1; /* compiler paranoia */
}