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fix check for md raid imsm signature on 4k devices

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On devices with 4k logical block size, the imsm signature
is located 8k from the end of the device, not 1k as is
the case for devices with 512 LBS.
This commit is contained in:
David Teigland 2021-02-18 11:42:32 -06:00
parent 3cba071254
commit 12667e9897
1 changed files with 10 additions and 0 deletions
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10
lib/device/dev-md.c
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@ -56,6 +56,16 @@ static int _dev_has_imsm_magic(struct device *dev, uint64_t devsize_sectors)
{
char imsm_signature[IMSM_SIG_LEN];
uint64_t off = (devsize_sectors * 512) - 1024;
unsigned int physical_block_size = 0;
unsigned int logical_block_size = 0;
if (!dev_get_direct_block_sizes(dev, &physical_block_size, &logical_block_size))
return_0;
if (logical_block_size == 4096)
off = (devsize_sectors * 512) - 8192;
else
off = (devsize_sectors * 512) - 1024;
if (!dev_read_bytes(dev, off, IMSM_SIG_LEN, imsm_signature))
return_0;