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dm zoned: check superblock location

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When specifying several devices the superblock location must be
checked to ensure the devices are specified in the correct order.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Hannes Reinecke 2020-06-02 13:09:56 +02:00 committed by Mike Snitzer
parent 2094045fe5
commit 27d49ac1dd
1 changed files with 9 additions and 1 deletions
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10
drivers/md/dm-zoned-metadata.c
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@ -997,7 +997,7 @@ static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_sb *dsb,
struct dmz_dev *dev = dsb->dev;
unsigned int nr_meta_zones, nr_data_zones;
u32 crc, stored_crc;
u64 gen;
u64 gen, sb_block;
if (le32_to_cpu(sb->magic) != DMZ_MAGIC) {
dmz_dev_err(dev, "Invalid meta magic (needed 0x%08x, got 0x%08x)",
@ -1026,6 +1026,14 @@ static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_sb *dsb,
return -ENXIO;
}
sb_block = le64_to_cpu(sb->sb_block);
if (sb_block != (u64)dsb->zone->id << zmd->zone_nr_blocks_shift ) {
dmz_dev_err(dev, "Invalid superblock position "
"(is %llu expected %llu)",
sb_block,
(u64)dsb->zone->id << zmd->zone_nr_blocks_shift);
return -EINVAL;
}
if (zmd->sb_version > 1) {
uuid_t sb_uuid;