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/*
mdcreate.c : Multiple Devices tools for Linux
Copyright (C) 1994-96 Marc ZYNGIER
<zyngier@ufr-info-p7.ibp.fr> or
<maz@gloups.fdn.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
You should have received a copy of the GNU General Public License
(for example /usr/src/linux/COPYING); if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include "md.h"
char **parser (char *, int, int *, unsigned long **);
int s2f (char *);
int open_or_die (char *file);
unsigned long calc_checksum (char *entry[], int pers);
int main (int argc, char *argv[])
{
int flag, fault=0, factor=0, pers=0, i;
unsigned long *dummy_long;
FILE *mdtab;
/*
* Expected syntax is :
* mdcreate [-cx] [-fx] personality /dev/mdx /dev/... /dev/...
*/
while (1)
{
if ((flag=getopt (argc, argv, "c:f:"))==-1)
break;
switch (flag)
{
case 'c':
factor=(unsigned char) s2f (optarg);
break;
case 'f':
fault=(unsigned char) atoi (optarg);
break;
}
}
if (argc<(optind+3))
{
fprintf (stderr, "Usage:\t%s [-c<n>k] [-f<n>] linear|raid0|raid1 /dev/md<n> dev0 dev1 ...\n", argv[0]);
exit (EXIT_FAILURE);
}
/* Create /etc/mdtab if it doesn't exists
Thanx to Nat <nat@nataa.frmug.fr.net> */
if ((i=open ("/etc/mdtab", O_RDONLY | O_CREAT))==-1)
{
perror ("/etc/mdtab");
exit (EXIT_FAILURE);
}
close (i);
if (parser (argv[optind+1], 0, &pers, &dummy_long))
{
fprintf (stderr, "%s already exists in /etc/mdtab\n", argv[optind+1]);
exit (EXIT_FAILURE);
}
if (!(mdtab=fopen ("/etc/mdtab", "r+")))
{
perror ("/etc/mdtab");
exit (EXIT_FAILURE);
}
if (!strcmp (argv[optind], "linear"))
pers=LINEAR;
if (!strcmp (argv[optind], "stripped") ||
!strcmp (argv[optind], "striped") ||
!strcmp (argv[optind], "raid0"))
pers=STRIPED | (factor & FACTOR_MASK);
if (!strcmp (argv[optind], "raid1"))
pers=(RAID1 |
(factor & FACTOR_MASK) |
((fault << FAULT_SHIFT) & FAULT_MASK));
if (!strcmp (argv[optind], "raid5"))
pers=(RAID5 |
(factor & FACTOR_MASK) |
((fault << FAULT_SHIFT) & FAULT_MASK));
if (!pers)
{
fprintf (stderr, "Unknown personality %s\n", argv[optind]);
exit (EXIT_FAILURE);
}
fseek (mdtab, 0L, SEEK_END);
fprintf (mdtab, "# mdtab entry for %s\n%s\t%s,%dk,%d,%08lx\t",
argv[optind+1],
argv[optind+1],
argv[optind],
1 << (PAGE_SHIFT-10+factor),
fault,
calc_checksum (argv+optind+1, pers));
for (i=optind+2; i<argc; i++)
fprintf (mdtab, "%s ", argv[i]);
fprintf (mdtab, "\n");
fclose (mdtab);
return (EXIT_SUCCESS);
}
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