svn commit: r313698 - stable/11/sys/geom/part
Andrey V. Elsukov
ae at FreeBSD.org
Mon Feb 13 12:07:09 UTC 2017
Author: ae
Date: Mon Feb 13 12:07:08 2017
New Revision: 313698
URL: https://svnweb.freebsd.org/changeset/base/313698
Log:
MFC r313185:
Check that primary GPT header is valid before wiping partitioning.
This allows safely destroy corrupted GPT when primary header was
rewritten by some data, that do not want to destroy.
Modified:
stable/11/sys/geom/part/g_part_gpt.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/geom/part/g_part_gpt.c
==============================================================================
--- stable/11/sys/geom/part/g_part_gpt.c Mon Feb 13 11:37:52 2017 (r313697)
+++ stable/11/sys/geom/part/g_part_gpt.c Mon Feb 13 12:07:08 2017 (r313698)
@@ -687,10 +687,11 @@ g_part_gpt_destroy(struct g_part_table *
table->hdr = NULL;
/*
- * Wipe the first 2 sectors to clear the partitioning. Wipe the last
- * sector only if it has valid secondary header.
+ * Wipe the first 2 sectors and last one to clear the partitioning.
+ * Wipe sectors only if they have valid metadata.
*/
- basetable->gpt_smhead |= 3;
+ if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK)
+ basetable->gpt_smhead |= 3;
if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
basetable->gpt_smtail |= 1;
More information about the svn-src-stable
mailing list