blkid: does not detect bcache cache any more

[alois31]

Behavior of blkid changed from version 2.38.1 to 2.39, preventing my system from booting. /dev/mapper/system--vg-cached--cache is a bcache cache device. blkid /dev/mapper/system--vg-cached--cache output:

On 2.38.1 (exit code 0):

/dev/mapper/system--vg-cached--cache: UUID="fc6ea56f-372e-474e-bc5b-2ddc8430ddd1" TYPE="bcache"

On 2.39, exit code is 2 and there is no output.

This leads me to the conclusion that there has been a regression preventing bcache cache devices from being detected properly.

[t-8ch]

Can you provide the output of bcache-super-show /dev/mapper/system--vg-cached--cache and LIBBLKID_DEBUG=all blkid -p /dev/mapper/system--vg-cached--cache ?

[alois31]

bcache-super-show /dev/mapper/system--vg-cached--cache:

sb.magic                ok
sb.first_sector         8 [match]
sb.csum                 C41A7238F57BAEBF [match]
sb.version              3 [cache device]

dev.label               (empty)
dev.uuid                fc6ea56f-372e-474e-bc5b-2ddc8430ddd1
dev.sectors_per_block   8
dev.sectors_per_bucket  2048
dev.cache.first_sector  2048
dev.cache.cache_sectors 209713152
dev.cache.total_sectors 209715200
dev.cache.ordered       yes
dev.cache.discard       yes
dev.cache.pos           0
dev.cache.replacement   0 [lru]

cset.uuid               2e98a2a7-229a-447c-9f8c-e3419184b286

LIBBLKID_DEBUG=all blkid -p /dev/mapper/system--vg-cached--cache:

23865: libblkid:     INIT: library debug mask: 0xffff
23865: libblkid:     INIT: library version: 2.39.0 [17-May-2023]
Available "LIBBLKID_DEBUG=<name>[,...]|<mask>" debug masks:
   all      [0x00ffff] : info about all subsystems
   cache    [0x000004] : blkid tags cache
   config   [0x000008] : config file utils
   dev      [0x000010] : device utils
   devname  [0x000020] : /proc/partitions evaluation
   devno    [0x000040] : conversions to device name
   evaluate [0x000080] : tags resolving
   help     [0x000001] : this help
   lowprobe [0x000100] : superblock/raids/partitions probing
   buffer   [0x002000] : low-probing buffers
   probe    [0x000200] : devices verification
   read     [0x000400] : cache parsing
   save     [0x000800] : cache writing
   tag      [0x001000] : tags utils
23865: libblkid: LOWPROBE: allocate a new probe
23865: libblkid: LOWPROBE: zeroize wiper
23865: libblkid: LOWPROBE: ready for low-probing, offset=0, size=107374182400, zonesize=0
23865: libblkid: LOWPROBE: whole-disk: YES, regfile: NO
23865: libblkid: LOWPROBE: start probe
23865: libblkid: LOWPROBE: zeroize wiper
23865: libblkid: LOWPROBE: chain safeprobe superblocks ENABLED
23865: libblkid: LOWPROBE: --> starting probing loop [SUBLKS idx=-1]
23865: libblkid: LOWPROBE: [0] crypto_LUKS:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=0 len=512
23865: libblkid: LOWPROBE:      read: off=16384 len=512
23865: libblkid: LOWPROBE:      read: off=32768 len=512
23865: libblkid: LOWPROBE:      read: off=65536 len=512
23865: libblkid: LOWPROBE:      read: off=131072 len=512
23865: libblkid: LOWPROBE:      read: off=262144 len=512
23865: libblkid: LOWPROBE:      read: off=524288 len=512
23865: libblkid: LOWPROBE:      read: off=1048576 len=512
23865: libblkid: LOWPROBE:      read: off=2097152 len=512
23865: libblkid: LOWPROBE:      read: off=4194304 len=512
23865: libblkid: LOWPROBE: [1] linux_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374116864 len=64
23865: libblkid: LOWPROBE:      read: off=107374174208 len=256
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=256)
23865: libblkid: LOWPROBE:      read: off=4096 len=256
23865: libblkid: LOWPROBE: [2] ddf_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374181888 len=512
23865: libblkid: LOWPROBE:      read: off=107374050816 len=512
23865: libblkid: LOWPROBE: [3] isw_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374181376 len=48
23865: libblkid: LOWPROBE: [4] lsi_mega_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=107374181888 len=512 (for off=107374181888 len=6)
23865: libblkid: LOWPROBE: [5] via_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=107374181888 len=512 (for off=107374181888 len=51)
23865: libblkid: LOWPROBE: [6] silicon_medley_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=107374181888 len=512 (for off=107374181888 len=512)
23865: libblkid: LOWPROBE: [7] nvidia_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374181376 len=120
23865: libblkid: LOWPROBE: [8] promise_fasttrack_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374150144 len=24
23865: libblkid: LOWPROBE:      read: off=107374051840 len=24
23865: libblkid: LOWPROBE:      read: off=107374051328 len=24
23865: libblkid:   BUFFER:      reuse: off=107374174208 len=256 (for off=107374174208 len=24)
23865: libblkid: LOWPROBE:      read: off=107373978112 len=24
23865: libblkid: LOWPROBE:      read: off=107373879808 len=24
23865: libblkid: LOWPROBE:      read: off=107373836800 len=24
23865: libblkid: LOWPROBE:      read: off=107373806080 len=24
23865: libblkid: LOWPROBE:      read: off=107373715968 len=24
23865: libblkid: LOWPROBE:      read: off=107373683712 len=24
23865: libblkid: LOWPROBE:      read: off=107373675008 len=24
23865: libblkid: LOWPROBE:      read: off=107373695488 len=24
23865: libblkid: LOWPROBE:      read: off=107372601856 len=24
23865: libblkid: LOWPROBE: [9] hpt45x_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374176768 len=4
23865: libblkid: LOWPROBE: [10] hpt37x_raid_member:
23865: libblkid: LOWPROBE:      read: off=4096 len=1024
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid: LOWPROBE: [11] adaptec_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=107374181888 len=512 (for off=107374181888 len=512)
23865: libblkid: LOWPROBE: [12] jmicron_raid_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=107374181888 len=512 (for off=107374181888 len=128)
23865: libblkid: LOWPROBE: [13] bcache:
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid: LOWPROBE:      magic sboff=24, kboff=4
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=4096 len=256 (for off=4096 len=56)
23865: libblkid:   BUFFER:      reuse: off=4096 len=256 (for off=4096 len=208)
incorrect checksum for type bcache, got 6BFAFB04F7DA8C6F, expected BFAE7BF538721AC4
23865: libblkid: LOWPROBE: [14] bcachefs:
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid: LOWPROBE:      magic sboff=24, kboff=4
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=752)
23865: libblkid: LOWPROBE: [15] ceph_bluestore:
23865: libblkid: LOWPROBE:      read: off=0 len=1024
23865: libblkid: LOWPROBE: [16] drbd:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=107374178304 len=104
23865: libblkid: LOWPROBE:      read: off=107374178304 len=1392
23865: libblkid: LOWPROBE: [17] drbdmanage_control_volume:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [18] drbdproxy_datalog:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [19] LVM2_member:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE:      read: off=1024 len=1024
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [20] LVM1_member:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [21] DM_snapshot_cow:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [22] DM_verity_hash:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [23] DM_integrity:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [24] VMFS_volume_member:
23865: libblkid: LOWPROBE:      read: off=1048576 len=1024
23865: libblkid: LOWPROBE: [25] ubi:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [26] vdo:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [27] stratis:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid: LOWPROBE: [28] BitLocker:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [29] cs_fvault2:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [30] vfat:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [31] swsuspend:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE:      read: off=3072 len=1024
23865: libblkid:   BUFFER:      reuse: off=3072 len=1024 (for off=3072 len=1024)
23865: libblkid:   BUFFER:      reuse: off=3072 len=1024 (for off=3072 len=1024)
23865: libblkid:   BUFFER:      reuse: off=3072 len=1024 (for off=3072 len=1024)
23865: libblkid: LOWPROBE:      read: off=7168 len=1024
23865: libblkid:   BUFFER:      reuse: off=7168 len=1024 (for off=7168 len=1024)
23865: libblkid:   BUFFER:      reuse: off=7168 len=1024 (for off=7168 len=1024)
23865: libblkid:   BUFFER:      reuse: off=7168 len=1024 (for off=7168 len=1024)
23865: libblkid: LOWPROBE:      read: off=15360 len=1024
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15360 len=1024)
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15360 len=1024)
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15360 len=1024)
23865: libblkid: LOWPROBE:      read: off=31744 len=1024
23865: libblkid:   BUFFER:      reuse: off=31744 len=1024 (for off=31744 len=1024)
23865: libblkid:   BUFFER:      reuse: off=31744 len=1024 (for off=31744 len=1024)
23865: libblkid:   BUFFER:      reuse: off=31744 len=1024 (for off=31744 len=1024)
23865: libblkid: LOWPROBE:      read: off=64512 len=1024
23865: libblkid:   BUFFER:      reuse: off=64512 len=1024 (for off=64512 len=1024)
23865: libblkid:   BUFFER:      reuse: off=64512 len=1024 (for off=64512 len=1024)
23865: libblkid:   BUFFER:      reuse: off=64512 len=1024 (for off=64512 len=1024)
23865: libblkid: LOWPROBE: [32] swap:
23865: libblkid:   BUFFER:      reuse: off=3072 len=1024 (for off=3072 len=1024)
23865: libblkid:   BUFFER:      reuse: off=3072 len=1024 (for off=3072 len=1024)
23865: libblkid:   BUFFER:      reuse: off=7168 len=1024 (for off=7168 len=1024)
23865: libblkid:   BUFFER:      reuse: off=7168 len=1024 (for off=7168 len=1024)
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15360 len=1024)
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15360 len=1024)
23865: libblkid:   BUFFER:      reuse: off=31744 len=1024 (for off=31744 len=1024)
23865: libblkid:   BUFFER:      reuse: off=31744 len=1024 (for off=31744 len=1024)
23865: libblkid:   BUFFER:      reuse: off=64512 len=1024 (for off=64512 len=1024)
23865: libblkid:   BUFFER:      reuse: off=64512 len=1024 (for off=64512 len=1024)
23865: libblkid: LOWPROBE: [33] xfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [34] xfs_external_log:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid: LOWPROBE:      read: off=0 len=262144
23865: libblkid: LOWPROBE: [35] exfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [36] ext4dev:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [37] ext4:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [38] ext3:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [39] ext2:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [40] jbd:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [41] reiserfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid: LOWPROBE: [42] reiser4:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid: LOWPROBE: [43] jfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid: LOWPROBE: [44] udf:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid: LOWPROBE: [45] iso9660:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=32768 len=1024)
23865: libblkid: LOWPROBE: [46] zfs_member:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:    PROBE: probe_zfs
23865: libblkid: LOWPROBE: => checking if off=0 size=262144 covered by PT
23865: libblkid: LOWPROBE: allocate a probe clone
23865: libblkid: LOWPROBE: allocate a new probe
23865: libblkid: LOWPROBE: partlist reset
23865: libblkid: LOWPROBE: parts: initialized partitions list (size=0)
23865: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: gpt: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: gpt: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: ultrix: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=28672 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: atari: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: atari: <--- (rc = 1)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
23865: libblkid: LOWPROBE: partitions probe done [rc=1]
23865: libblkid: LOWPROBE: free probe
23865: libblkid: LOWPROBE: <= NOT covered by PT
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=0 len=262144)
23865: libblkid: LOWPROBE: => checking if off=262144 size=262144 covered by PT
23865: libblkid: LOWPROBE: allocate a probe clone
23865: libblkid: LOWPROBE: allocate a new probe
23865: libblkid: LOWPROBE: partlist reset
23865: libblkid: LOWPROBE: parts: initialized partitions list (size=0)
23865: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: gpt: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: gpt: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: ultrix: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=28672 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: atari: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: atari: <--- (rc = 1)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
23865: libblkid: LOWPROBE: partitions probe done [rc=1]
23865: libblkid: LOWPROBE: free probe
23865: libblkid: LOWPROBE: <= NOT covered by PT
23865: libblkid: LOWPROBE:      read: off=262144 len=262144
23865: libblkid: LOWPROBE: => checking if off=107373658112 size=262144 covered by PT
23865: libblkid: LOWPROBE: allocate a probe clone
23865: libblkid: LOWPROBE: allocate a new probe
23865: libblkid: LOWPROBE: partlist reset
23865: libblkid: LOWPROBE: parts: initialized partitions list (size=0)
23865: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: gpt: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: gpt: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: ultrix: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=28672 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: atari: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: atari: <--- (rc = 1)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
23865: libblkid: LOWPROBE: partitions probe done [rc=1]
23865: libblkid: LOWPROBE: free probe
23865: libblkid: LOWPROBE: <= NOT covered by PT
23865: libblkid: LOWPROBE:      read: off=107373658112 len=262144
23865: libblkid: LOWPROBE: => checking if off=107373920256 size=262144 covered by PT
23865: libblkid: LOWPROBE: allocate a probe clone
23865: libblkid: LOWPROBE: allocate a new probe
23865: libblkid: LOWPROBE: partlist reset
23865: libblkid: LOWPROBE: parts: initialized partitions list (size=0)
23865: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: gpt: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: gpt: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: ultrix: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=28672 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: atari: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: atari: <--- (rc = 1)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
23865: libblkid: LOWPROBE: partitions probe done [rc=1]
23865: libblkid: LOWPROBE: free probe
23865: libblkid: LOWPROBE: <= NOT covered by PT
23865: libblkid: LOWPROBE:      read: off=107373920256 len=262144
23865: libblkid: LOWPROBE: [47] hfsplus:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [48] hfs:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [49] ufs:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=0 len=1377)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1377)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1377)
23865: libblkid:   BUFFER:      reuse: off=262144 len=262144 (for off=262144 len=1377)
23865: libblkid: LOWPROBE: [50] hpfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid: LOWPROBE: [51] sysv:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=512 len=512)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=9728 len=512)
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=18944 len=512)
23865: libblkid: LOWPROBE: [52] xenix:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=2048 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=2048 len=1024)
23865: libblkid: LOWPROBE: [53] ntfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [54] ReFS:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [55] cramfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [56] romfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [57] minix:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [58] gfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid: LOWPROBE: [59] gfs2:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid: LOWPROBE: [60] ocfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid: LOWPROBE: [61] ocfs2:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=2048 len=1024)
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid: LOWPROBE: [62] oracleasm:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [63] vxfs:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=8192 len=1024)
23865: libblkid: LOWPROBE: [64] squashfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [65] squashfs3:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [66] nss:
23865: libblkid:   BUFFER:      reuse: off=4096 len=1024 (for off=4096 len=1024)
23865: libblkid: LOWPROBE: [67] btrfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=65536 len=1024)
23865: libblkid: LOWPROBE: [68] ubifs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [69] bfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [70] VMFS:
23865: libblkid: LOWPROBE:      read: off=2097152 len=1024
23865: libblkid: LOWPROBE: [71] befs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [72] nilfs2:
23865: libblkid: LOWPROBE:      call probefunc()
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid:   BUFFER:      reuse: off=107374178304 len=1392 (for off=107374178304 len=1024)
23865: libblkid: LOWPROBE: [73] exfat:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [74] f2fs:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: [75] mpool:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [76] apfs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [77] zonefs:
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: [78] erofs:
23865: libblkid:   BUFFER:      reuse: off=1024 len=1024 (for off=1024 len=1024)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [SUBLKS idx=78]
23865: libblkid: LOWPROBE: freeing values list
23865: libblkid: LOWPROBE: chain safeprobe topology DISABLED
23865: libblkid: LOWPROBE: chain safeprobe partitions ENABLED
23865: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: gpt: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: gpt: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: ultrix: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=15360 len=1024 (for off=15872 len=512)
23865: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=262144 (for off=28672 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid:   BUFFER:      reuse: off=0 len=1024 (for off=0 len=1024)
23865: libblkid: LOWPROBE: atari: ---> call probefunc()
23865: libblkid:   BUFFER:      reuse: off=0 len=512 (for off=0 len=512)
23865: libblkid: LOWPROBE: atari: <--- (rc = 1)
23865: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
23865: libblkid: LOWPROBE: parts: start probing for partition entry
23865: libblkid: LOWPROBE: parts: end probing for partition entry [nothing]
23865: libblkid: LOWPROBE: partitions probe done [rc=1]
23865: libblkid: LOWPROBE: end probe
23865: libblkid: LOWPROBE: zeroize wiper
23865: libblkid:   BUFFER: Resetting probing buffers
23865: libblkid:   BUFFER:  remove buffer: [off=0, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=16384, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=32768, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=65536, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=131072, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=262144, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=524288, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=1048576, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=2097152, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=4194304, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=107374116864, len=64]
23865: libblkid:   BUFFER:  remove buffer: [off=107374174208, len=256]
23865: libblkid:   BUFFER:  remove buffer: [off=4096, len=256]
23865: libblkid:   BUFFER:  remove buffer: [off=107374181888, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=107374050816, len=512]
23865: libblkid:   BUFFER:  remove buffer: [off=107374181376, len=48]
23865: libblkid:   BUFFER:  remove buffer: [off=107374181376, len=120]
23865: libblkid:   BUFFER:  remove buffer: [off=107374150144, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107374051840, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107374051328, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373978112, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373879808, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373836800, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373806080, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373715968, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373683712, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373675008, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107373695488, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107372601856, len=24]
23865: libblkid:   BUFFER:  remove buffer: [off=107374176768, len=4]
23865: libblkid:   BUFFER:  remove buffer: [off=4096, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=0, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=107374178304, len=104]
23865: libblkid:   BUFFER:  remove buffer: [off=107374178304, len=1392]
23865: libblkid:   BUFFER:  remove buffer: [off=1024, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=1048576, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=3072, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=7168, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=15360, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=31744, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=64512, len=1024]
23865: libblkid:   BUFFER:  remove buffer: [off=0, len=262144]
23865: libblkid:   BUFFER:  remove buffer: [off=262144, len=262144]
23865: libblkid:   BUFFER:  remove buffer: [off=107373658112, len=262144]
23865: libblkid:   BUFFER:  remove buffer: [off=107373920256, len=262144]
23865: libblkid:   BUFFER:  remove buffer: [off=2097152, len=1024]
23865: libblkid: LOWPROBE:  buffers summary: 1067492 bytes by 46 read() calls
23865: libblkid: LOWPROBE: free probe

[t-8ch]

It fails the new checksum test. But bcache-show-super shows that the checksum is correct.

incorrect checksum for type bcache, got 6BFAFB04F7DA8C6F, expected BFAE7BF538721AC4

[alois31]

The "expected" checksum is the byte-swapped version of what bcache-super-show gives. Endianness messed up, maybe?

[t-8ch]

Endianness messed up, maybe?

No that is fine. We have testcases for it, even on big endian.

How did you create this device? It is a cache with superblock version 3.
Our examples and my bcache-tools only have superblock version 0.

[alois31]

make-bcache --block=4k --bucket=1M -C /dev/mapper/system--vg-cached--cache.

[t-8ch]

I can't seem to reproduce this...
Any chance you could upload the first 4k bytes of the disk somewhere or send it to me privately?

(If you can reproduce this with a new, blank image that would be great, too)

[alois31]

The first 4k bytes of the disk are seemingly just a bunch of zeroes. Peeking around in the Linux source code suggests that enabling discards may have lead to the superblock version being bumped to 3.

[t-8ch]

What about the first 128k?
I'll also try to reproduce it later again

[alois31]

Hexdump of first 8k bytes: https://gist.github.com/alois31/f2f75cc9dc73be24ab1b9193482ff463

I can reproduce the mentioned behavior with this.

[t-8ch]

Thanks for the reproducer. The problem is that the journal information is not checksummed.
I'll prepare a fix.

[t-8ch]

@alois31 Care to test the changes from #2292?

They should also apply to vanilla v2.39. In the conflict just accept the new version.