FreeBSD-5.3/sys/dev/vinum/vinumutil.c
/*-
* Copyright (c) 1997, 1998, 1999
* Nan Yang Computer Services Limited. All rights reserved.
*
* Written by Greg Lehey
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* 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 Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``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 the company or contributors 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.
*
* $Id: vinumutil.c,v 1.17 2003/04/28 02:54:43 grog Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/vinum/vinumutil.c,v 1.19 2004/06/16 09:47:02 phk Exp $");
/* This file contains utility routines used both in kernel and user context */
#include <dev/vinum/vinumhdr.h>
#include <dev/vinum/statetexts.h>
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
extern jmp_buf command_fail; /* return on a failed command */
#endif
static char numeric_state[32]; /* temporary buffer for ASCII conversions */
#define STATECOUNT(x) (sizeof (x##statetext) / sizeof (char *))
/* Return drive state as a string */
char *
drive_state(enum drivestate state)
{
if (((unsigned) state) >= STATECOUNT(drive)) {
sprintf(numeric_state, "Invalid state %d", (int) state);
return numeric_state;
} else
return drivestatetext[state];
}
/* Return volume state as a string */
char *
volume_state(enum volumestate state)
{
if (((unsigned) state) >= STATECOUNT(vol)) {
sprintf(numeric_state, "Invalid state %d", (int) state);
return numeric_state;
} else
return volstatetext[state];
}
/* Return plex state as a string */
char *
plex_state(enum plexstate state)
{
if (((unsigned) state) >= STATECOUNT(plex)) {
sprintf(numeric_state, "Invalid state %d", (int) state);
return numeric_state;
} else
return plexstatetext[state];
}
/* Return plex organization as a string */
char *
plex_org(enum plexorg org)
{
switch (org) {
case plex_disorg: /* disorganized */
return "disorg";
break;
case plex_concat: /* concatenated plex */
return "concat";
break;
case plex_striped: /* striped plex */
return "striped";
break;
case plex_raid4: /* RAID-4 plex */
return "raid4";
case plex_raid5: /* RAID-5 plex */
return "raid5";
break;
default:
sprintf(numeric_state, "Invalid org %d", (int) org);
return numeric_state;
}
}
/* Return sd state as a string */
char *
sd_state(enum sdstate state)
{
if (((unsigned) state) >= STATECOUNT(sd)) {
sprintf(numeric_state, "Invalid state %d", (int) state);
return numeric_state;
} else
return sdstatetext[state];
}
/* Now convert in the other direction */
/*
* These are currently used only internally,
* so we don't do too much error checking
*/
enum drivestate
DriveState(char *text)
{
int i;
for (i = 0; i < STATECOUNT(drive); i++)
if (strcmp(text, drivestatetext[i]) == 0) /* found it */
return (enum drivestate) i;
return -1;
}
enum sdstate
SdState(char *text)
{
int i;
for (i = 0; i < STATECOUNT(sd); i++)
if (strcmp(text, sdstatetext[i]) == 0) /* found it */
return (enum sdstate) i;
return -1;
}
enum plexstate
PlexState(char *text)
{
int i;
for (i = 0; i < STATECOUNT(plex); i++)
if (strcmp(text, plexstatetext[i]) == 0) /* found it */
return (enum plexstate) i;
return -1;
}
enum volumestate
VolState(char *text)
{
int i;
for (i = 0; i < STATECOUNT(vol); i++)
if (strcmp(text, volstatetext[i]) == 0) /* found it */
return (enum volumestate) i;
return -1;
}
/*
* Take a number with an optional scale factor and convert
* it to a number of bytes.
*
* The scale factors are:
*
* s sectors (of 512 bytes)
* b blocks (of 512 bytes). This unit is deprecated,
* because it's confusing, but maintained to avoid
* confusing Veritas users.
* k kilobytes (1024 bytes)
* m megabytes (of 1024 * 1024 bytes)
* g gigabytes (of 1024 * 1024 * 1024 bytes)
*/
u_int64_t
sizespec(char *spec)
{
u_int64_t size;
char *s;
int sign = 1; /* -1 if negative */
size = 0;
if (spec != NULL) { /* we have a parameter */
s = spec;
if (*s == '-') { /* negative, */
sign = -1;
s++; /* skip */
}
if ((*s >= '0') && (*s <= '9')) { /* it's numeric */
while ((*s >= '0') && (*s <= '9')) /* it's numeric */
size = size * 10 + *s++ - '0'; /* convert it */
switch (*s) {
case '\0':
return size * sign;
case 'B':
case 'b':
case 'S':
case 's':
return size * sign * 512;
case 'K':
case 'k':
return size * sign * 1024;
case 'M':
case 'm':
return size * sign * 1024 * 1024;
case 'G':
case 'g':
return size * sign * 1024 * 1024 * 1024;
}
}
#ifdef _KERNEL
throw_rude_remark(EINVAL, "Invalid length specification: %s", spec);
#else
fprintf(stderr, "Invalid length specification: %s", spec);
longjmp(command_fail, 1);
#endif
}
#ifdef _KERNEL
throw_rude_remark(EINVAL, "Missing length specification");
#else
fprintf(stderr, "Missing length specification");
longjmp(command_fail, 1);
#endif
/* NOTREACHED */
return -1;
}
#ifdef _KERNEL
#define FOOTYPE struct cdev *
#else
#define FOOTYPE dev_t
#endif
/*
* Extract the volume number from a device number. Check that it's
* the correct type, and that it isn't one of the superdevs.
*/
int
Volno(FOOTYPE dev)
{
int volno = minor(dev);
if (OBJTYPE(dev) != VINUM_VOLUME_TYPE)
return -1;
else
volno = ((volno & 0x3fff0000) >> 8) | (volno & 0xff);
if ((volno == VINUM_SUPERDEV_VOL)
|| (volno == VINUM_DAEMON_VOL))
return -1;
else
return volno;
}
/*
* 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(FOOTYPE dev)
{
int plexno = minor(dev);
if (OBJTYPE(dev) != VINUM_PLEX_TYPE)
return -1;
else
return ((plexno & 0x3fff0000) >> 8) | (plexno & 0xff);
}
/*
* 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(FOOTYPE dev)
{
int sdno = minor(dev);
/*
* Care: VINUM_SD_TYPE is 2 or 3, which is why we use < instead of
* !=. It's not clear that this makes any sense abstracting it to
* this level.
*/
if (OBJTYPE(dev) < VINUM_SD_TYPE)
return -1;
else
/*
* Note that the number we return includes the low-order bit of the
* type field. This gives us twice as many potential subdisks as
* plexes or volumes.
*/
return ((sdno & 0x7fff0000) >> 8) | (sdno & 0xff);
}