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Detect dm-verity in kernel.

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This commit is contained in:
Milan Broz
2012-06-07 12:32:06 +02:00
parent 4b0b82adc5
commit 0e79728f86
4 changed files with 20 additions and 1 deletions
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15
lib/libdevmapper.c
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@@ -127,6 +127,16 @@ static void _dm_set_crypt_compat(const char *dm_version, unsigned crypt_maj,
_dm_crypt_checked = 1;
}
static void _dm_set_verity_compat(const char *dm_version, unsigned verity_maj,
unsigned verity_min, unsigned verity_patch)
{
if (verity_maj > 0)
_dm_crypt_flags |= DM_VERITY_SUPPORTED;
log_dbg("Detected dm-verity version %i.%i.%i.",
verity_maj, verity_min, verity_patch);
}
static int _dm_check_versions(void)
{
struct dm_task *dmt;
@@ -158,6 +168,11 @@ static int _dm_check_versions(void)
(unsigned)target->version[0],
(unsigned)target->version[1],
(unsigned)target->version[2]);
} else if (!strcmp(DM_VERITY_TARGET, target->name)) {
_dm_set_verity_compat(dm_version,
(unsigned)target->version[0],
(unsigned)target->version[1],
(unsigned)target->version[2]);
}
target = (struct dm_versions *)((char *) target + target->next);
} while (last_target != target);