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Don't look for GPT primary and secondary tables on a disk unless we have

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a valid PMBR.  Without this fix, if label a disk with a GPT, then relabel
it with an MBR the GPT tables are still present.  If you then try to create
a GPT with 'gpt create', gpt(8) will fail to open the device because the
partitions in the stale GPT overlap with the slices in the MBR.

MFC after:	1 week
This commit is contained in:
John Baldwin 2007-11-01 20:51:04 +00:00
parent eb5cbaa020
commit 926f079146
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=173265
1 changed files with 10 additions and 4 deletions
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14
sbin/gpt/gpt.c
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@ -585,10 +585,16 @@ gpt_open(const char *dev)
if (gpt_mbr(fd, 0LL) == -1)
goto close;
if (gpt_gpt(fd, 1LL) == -1)
goto close;
if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
goto close;
/*
* Don't look for a GPT unless we have a valid PMBR.
*/
if (map_find(MAP_TYPE_PMBR) != NULL) {
if (gpt_gpt(fd, 1LL) == -1)
goto close;
if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
goto close;
}
return (fd);