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From 2181ce4a5726c4c72e68e6964b7ef7442e507707 Mon Sep 17 00:00:00 2001
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From: Alexey Obitotskiy <aleksey.obitotskiy@intel.com>
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Date: Fri, 24 Jun 2016 11:59:35 +0200
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Subject: [PATCH] libblkid: Add metadata signature check for IMSM on 4Kn drives
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Drives with 512 and 4K sectors have different offset for
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metadata signature. Without signature detected on 4Kn drives
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those drives will not be recognized as raid member. This
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patch adds checking for IMSM signature for 4Kn drives.
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1451704
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Signed-off-by: Alexey Obitotskiy <aleksey.obitotskiy@intel.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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libblkid/src/superblocks/isw_raid.c | 13 +++++++------
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1 file changed, 7 insertions(+), 6 deletions(-)
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diff --git a/libblkid/src/superblocks/isw_raid.c b/libblkid/src/superblocks/isw_raid.c
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index 065c2b2..81d53a1 100644
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--- a/libblkid/src/superblocks/isw_raid.c
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+++ b/libblkid/src/superblocks/isw_raid.c
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@@ -25,11 +25,11 @@ struct isw_metadata {
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#define ISW_SIGNATURE "Intel Raid ISM Cfg Sig. "
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-
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static int probe_iswraid(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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{
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uint64_t off;
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+ unsigned int sector_size;
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struct isw_metadata *isw;
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if (pr->size < 0x10000)
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@@ -37,16 +37,17 @@ static int probe_iswraid(blkid_probe pr,
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if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
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return 1;
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- off = ((pr->size / 0x200) - 2) * 0x200;
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- isw = (struct isw_metadata *)
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- blkid_probe_get_buffer(pr,
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- off,
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- sizeof(struct isw_metadata));
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+ sector_size = blkid_probe_get_sectorsize(pr);
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+ off = ((pr->size / sector_size) - 2) * sector_size;
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+
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+ isw = (struct isw_metadata *)blkid_probe_get_buffer(pr,
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+ off, sizeof(struct isw_metadata));
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if (!isw)
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return errno ? -errno : 1;
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if (memcmp(isw->sig, ISW_SIGNATURE, sizeof(ISW_SIGNATURE)-1) != 0)
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return 1;
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+
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if (blkid_probe_sprintf_version(pr, "%6s",
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&isw->sig[sizeof(ISW_SIGNATURE)-1]) != 0)
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return 1;
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--
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2.9.4
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