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Add additional check to EBR probe and create methods:

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don't try probe and create  EBR scheme when parent partition type
is not "ebr". This fixes error messages about corrupted EBR for
some partitions where is actually another partition scheme.

NOTE: if you have EBR on the partition with different than "ebr"
(0x05) type, then you will lost access to partitions until it will be
changed.

MFC after:	2 weeks
This commit is contained in:
Andrey V. Elsukov 2012-02-15 10:33:29 +00:00
parent 0d8bc07eba
commit 3bcf7d7191
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=231754
1 changed files with 19 additions and 8 deletions
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27
sys/geom/part/g_part_ebr.c
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@ -268,7 +268,7 @@ g_part_ebr_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
static int
g_part_ebr_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
char psn[8];
char type[64];
struct g_consumer *cp;
struct g_provider *pp;
uint32_t msize;
@ -285,10 +285,15 @@ g_part_ebr_create(struct g_part_table *basetable, struct g_part_parms *gpp)
if (basetable->gpt_depth == 0)
return (ENXIO);
cp = LIST_FIRST(&pp->consumers);
error = g_getattr("PART::scheme", cp, &psn);
if (error)
error = g_getattr("PART::scheme", cp, &type);
if (error != 0)
return (error);
if (strcmp(psn, "MBR"))
if (strcmp(type, "MBR") != 0)
return (ENXIO);
error = g_getattr("PART::type", cp, &type);
if (error != 0)
return (error);
if (strcmp(type, "ebr") != 0)
return (ENXIO);
msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
@ -405,7 +410,7 @@ g_part_ebr_precheck(struct g_part_table *table, enum g_part_ctl req,
static int
g_part_ebr_probe(struct g_part_table *table, struct g_consumer *cp)
{
char psn[8];
char type[64];
struct g_provider *pp;
u_char *buf, *p;
int error, index, res;
@ -422,10 +427,16 @@ g_part_ebr_probe(struct g_part_table *table, struct g_consumer *cp)
/* Check that we have a parent and that it's a MBR. */
if (table->gpt_depth == 0)
return (ENXIO);
error = g_getattr("PART::scheme", cp, &psn);
if (error)
error = g_getattr("PART::scheme", cp, &type);
if (error != 0)
return (error);
if (strcmp(psn, "MBR"))
if (strcmp(type, "MBR") != 0)
return (ENXIO);
/* Check that partition has type DOSPTYP_EBR. */
error = g_getattr("PART::type", cp, &type);
if (error != 0)
return (error);
if (strcmp(type, "ebr") != 0)
return (ENXIO);
/* Check that there's a EBR. */