/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
- * Email: <neilb@cse.unsw.edu.au>
- * Paper: Neil Brown
- * School of Computer Science and Engineering
- * The University of New South Wales
- * Sydney, 2052
- * Australia
+ * Email: <neilb@suse.de>
*
* Added by Dale Stephenson
* steph@snapserver.com
#include "md_u.h"
#include "md_p.h"
-int Kill(char *dev, int force)
+int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl)
{
/*
* Nothing fancy about Kill. It just zeroes out a superblock
* Definitely not safe.
+ * Returns:
+ * 0 - a zero superblock was successfully written out
+ * 1 - failed to write the zero superblock
+ * 2 - failed to open the device or find a superblock.
*/
- mdp_super_t super;
int fd, rv = 0;
-
- fd = open(dev, O_RDWR);
+
+ if (force)
+ noexcl = 1;
+ fd = open(dev, O_RDWR|(noexcl ? 0 : O_EXCL));
if (fd < 0) {
- fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
- dev);
- return 1;
- }
- rv = load_super(fd, &super);
- if (force && rv >= 5)
- rv = 0; /* ignore bad data in superblock */
- switch(rv) {
- case 1:
- fprintf(stderr, Name ": cannot file device size for %s: %s\n",
- dev, strerror(errno));
- break;
- case 2:
- fprintf(stderr, Name ": %s is too small for md.\n", dev);
- break;
- case 3:
- case 4:
- fprintf(stderr, Name ": cannot access superblock on %s.\n", dev);
- break;
- case 5:
- case 6:
- fprintf(stderr, Name ": %s does not appear to have an MD superblock.\n", dev);
- break;
- }
- if (!rv) {
- memset(&super, 0, sizeof(super));
- if (store_super(fd, &super)) {
- fprintf(stderr, Name ": Could not zero superblock on %s\n",
+ if (!quiet)
+ fprintf(stderr, Name ": Couldn't open %s for write - not zeroing\n",
dev);
+ return 2;
+ }
+ if (st == NULL)
+ st = guess_super(fd);
+ if (st == NULL || st->ss->init_super == NULL) {
+ if (!quiet)
+ fprintf(stderr, Name ": Unrecognised md component device - %s\n", dev);
+ close(fd);
+ return 2;
+ }
+ st->ignore_hw_compat = 1;
+ rv = st->ss->load_super(st, fd, dev);
+ if (rv == 0 || (force && rv >= 2)) {
+ st->ss->free_super(st);
+ st->ss->init_super(st, NULL, 0, "", NULL, NULL);
+ if (st->ss->store_super(st, fd)) {
+ if (!quiet)
+ fprintf(stderr, Name ": Could not zero superblock on %s\n",
+ dev);
rv = 1;
+ } else if (rv) {
+ if (!quiet)
+ fprintf(stderr, Name ": superblock zeroed anyway\n");
+ rv = 0;
}
}
close(fd);
return rv;
}
+
+int Kill_subarray(char *dev, char *subarray, int quiet)
+{
+ /* Delete a subarray out of a container, the subarry must be
+ * inactive. The subarray string must be a subarray index
+ * number.
+ *
+ * 0 = successfully deleted subarray from all container members
+ * 1 = failed to sync metadata to one or more devices
+ * 2 = failed to find the container, subarray, or other resource
+ * issue
+ */
+ struct supertype supertype, *st = &supertype;
+ int fd, rv = 2;
+
+ memset(st, 0, sizeof(*st));
+
+ fd = open_subarray(dev, subarray, st, quiet);
+ if (fd < 0)
+ return 2;
+
+ if (!st->ss->kill_subarray) {
+ if (!quiet)
+ fprintf(stderr,
+ Name ": Operation not supported for %s metadata\n",
+ st->ss->name);
+ goto free_super;
+ }
+
+ if (is_subarray_active(subarray, st->devname)) {
+ if (!quiet)
+ fprintf(stderr,
+ Name ": Subarray-%s still active, aborting\n",
+ subarray);
+ goto free_super;
+ }
+
+ if (mdmon_running(st->devnum))
+ st->update_tail = &st->updates;
+
+ /* ok we've found our victim, drop the axe */
+ rv = st->ss->kill_subarray(st);
+ if (rv) {
+ if (!quiet)
+ fprintf(stderr,
+ Name ": Failed to delete subarray-%s from %s\n",
+ subarray, dev);
+ goto free_super;
+ }
+
+ /* FIXME these routines do not report success/failure */
+ if (st->update_tail)
+ flush_metadata_updates(st);
+ else
+ st->ss->sync_metadata(st);
+
+ if (!quiet)
+ fprintf(stderr,
+ Name ": Deleted subarray-%s from %s, UUIDs may have changed\n",
+ subarray, dev);
+
+ rv = 0;
+
+ free_super:
+ st->ss->free_super(st);
+ close(fd);
+
+ return rv;
+}