delta/util-linux.git/libblkid/src, branch master git.kernel.org: pub/scm/utils/util-linux/util-linux.git libblkid: xfs: clean up call to ul_crc32_exclude_offset 2023-04-17T09:38:46+00:00 Thomas Weißschuh thomas@t-8ch.de 2023-04-17T09:38:26+00:00 8ab0edfe0d72f0aedf22a4e482af3400bcf6f102 Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> 
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
libblkid: erofs: calculate checksum with offset 2023-04-17T09:36:55+00:00 Thomas Weißschuh thomas@t-8ch.de 2023-04-17T09:36:30+00:00 6d5076d73266ce4a6cf30dd4778bc0485770a5f0 Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> 
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
libblkid: Compute CRC with sb_crc zeroed 2023-04-14T23:49:27+00:00 Jeremy Linton jeremy.linton@arm.com 2023-04-14T21:25:28+00:00 f8017377281659c0d4ad405b75baf1cd7788515b The Linux kernel computes the sb_crc by crcing the superblock with the CRC field set to 0. The code is trying to avoid doing this in three separate CRC calls like the kernel performs by simply zeroing the field and making a single call. Except that the passed copy "ondisk" isn't the same as the returned copy "csummed" so the zeroing goes into the wrong buffer. Meaning that the CRC is computed incorrectly. This results in blkid returning: /dev/sda4: PARTUUID="2f162043-63c2-d145-869b-e53f9db57476" rather than: /dev/sda4: UUID="45b931b7-592a-46dc-9c33-d38d5901ec29" BLOCK_SIZE="4096" TYPE="xfs" PARTUUID="2f162043-63c2-d145-869b-e53f9db57476" Which can result in lots of failures including boot failures if XFS modules aren't placed into the initrd, or scripts/etc cannot determine the fs UUID. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> 
The Linux kernel computes the sb_crc by crcing the
superblock with the CRC field set to 0. The code is
trying to avoid doing this in three separate CRC calls
like the kernel performs by simply zeroing the field
and making a single call.

Except that the passed copy "ondisk" isn't the same
as the returned copy "csummed" so the zeroing goes into
the wrong buffer. Meaning that the CRC is computed
incorrectly. This results in blkid returning:

/dev/sda4: PARTUUID="2f162043-63c2-d145-869b-e53f9db57476"

rather than:

/dev/sda4: UUID="45b931b7-592a-46dc-9c33-d38d5901ec29" BLOCK_SIZE="4096" TYPE="xfs" PARTUUID="2f162043-63c2-d145-869b-e53f9db57476"

Which can result in lots of failures including boot
failures if XFS modules aren't placed into the initrd,
or scripts/etc cannot determine the fs UUID.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
libblkid: copy BLKID_PARTS_FORCE_GPT to whole-disk prober 2023-04-04T09:04:51+00:00 Karel Zak kzak@redhat.com 2023-04-04T09:04:51+00:00 22769acf56daf6683d635fe92e06ceb52e0433ff Addresses: https://github.com/util-linux/util-linux/discussions/2146 Signed-off-by: Karel Zak <kzak@redhat.com> 
Addresses: https://github.com/util-linux/util-linux/discussions/2146
Signed-off-by: Karel Zak <kzak@redhat.com>
build-sys: fix libblkid fuzz sample test if-endif 2023-03-17T12:11:50+00:00 Karel Zak kzak@redhat.com 2023-03-17T12:11:50+00:00 bccae5d85831c4cfa6b5d147acec739bd3c148b9 All tests have to be covered by BUILD_LIBBLKID_TESTS otherwise proper CFLAGS ($blkid_tests_cflags) are undefined. Fixes: https://github.com/util-linux/util-linux/issues/2119 Signed-off-by: Karel Zak <kzak@redhat.com> 
All tests have to be covered by BUILD_LIBBLKID_TESTS otherwise
proper CFLAGS ($blkid_tests_cflags) are undefined.

Fixes: https://github.com/util-linux/util-linux/issues/2119
Signed-off-by: Karel Zak <kzak@redhat.com>
libblkid: nvidia_raid: validate full signature 2023-03-02T22:01:54+00:00 Thomas Weißschuh thomas@t-8ch.de 2023-03-02T21:27:12+00:00 e99ca712a9a379f7659c967560b5bd08a824f99c Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> 
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
libblkid: nvidia_raid: validate checksum 2023-03-02T22:01:54+00:00 Thomas Weißschuh thomas@t-8ch.de 2023-03-02T15:54:39+00:00 8a08c34aad61cb59c977212458bf55f5a81186e8 See #1843 Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> 
See #1843

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
libblkid: nvidia_raid: verify superblock size 2023-03-02T20:44:01+00:00 Thomas Weißschuh thomas@t-8ch.de 2023-03-02T15:27:58+00:00 d8d164db5ee217034dea7788263b532114bcd2fd Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> 
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
libblkid: try LUKS2 first when probing 2023-02-22T02:02:03+00:00 Luca Boccassi bluca@debian.org 2023-02-09T01:21:07+00:00 b8889c0a214aeb3dd47bf1ab280fe5534b64d2aa If a device is locked with OPAL we'll get an I/O error when probing past the LUKS2 header. Try it first to avoid this issue. It is useful regardless, as when we find a LUKS superblock we stop there anyway, no need to check futher. Signed-off-by: Luca Boccassi <bluca@debian.org> 
If a device is locked with OPAL we'll get an I/O error when probing
past the LUKS2 header. Try it first to avoid this issue. It is
useful regardless, as when we find a LUKS superblock we stop there
anyway, no need to check futher.

Signed-off-by: Luca Boccassi <bluca@debian.org>
libblkid: check if device is OPAL locked on I/O error 2023-02-22T02:02:03+00:00 Luca Boccassi bluca@debian.org 2023-02-22T01:33:36+00:00 a0cf9105e0591904dec87aa4e37ed13f5e6ec2fa Use the appropriate ioctl, if available, to check if a device is locked when we get an I/O error. Save the information so that we don't have to repeat the ioctl. Before: LIBBLKID_DEBUG=all blkid -p /dev/sdd2 206326: libblkid: INIT: library debug mask: 0xffff 206326: libblkid: INIT: library version: 2.38.1 [04-Aug-2022] Available "LIBBLKID_DEBUG=<name>[,...]|<mask>" debug masks: all [0xffff] : info about all subsystems cache [0x0004] : blkid tags cache config [0x0008] : config file utils dev [0x0010] : device utils devname [0x0020] : /proc/partitions evaluation devno [0x0040] : conversions to device name evaluate [0x0080] : tags resolving help [0x0001] : this help lowprobe [0x0100] : superblock/raids/partitions probing buffer [0x2000] : low-probing buffers probe [0x0200] : devices verification read [0x0400] : cache parsing save [0x0800] : cache writing tag [0x1000] : tags utils 206326: libblkid: LOWPROBE: allocate a new probe 206326: libblkid: LOWPROBE: zeroize wiper 206326: libblkid: LOWPROBE: ready for low-probing, offset=0, size=234584276992, zonesize=0 206326: libblkid: LOWPROBE: whole-disk: NO, regfile: NO 206326: libblkid: LOWPROBE: start probe 206326: libblkid: LOWPROBE: zeroize wiper 206326: libblkid: LOWPROBE: chain safeprobe superblocks ENABLED 206326: libblkid: LOWPROBE: --> starting probing loop [SUBLKS idx=-1] 206326: libblkid: LOWPROBE: [0] linux_raid_member: 206326: libblkid: LOWPROBE: call probefunc() 206326: libblkid: LOWPROBE: read: off=234584211456 len=64 206326: libblkid: LOWPROBE: read failed: Input/output error 206326: libblkid: LOWPROBE: <-- leaving probing loop (failed=-5) [SUBLKS idx=0] 206326: libblkid: LOWPROBE: freeing values list 206326: libblkid: LOWPROBE: end probe 206326: libblkid: LOWPROBE: zeroize wiper 206326: libblkid: LOWPROBE: free probe After: LIBBLKID_DEBUG=all blkid -p /dev/sdd2 206221: libblkid: INIT: library debug mask: 0xffff 206221: libblkid: INIT: library version: 2.38.1119 [28-Mar-2022] 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 206221: libblkid: LOWPROBE: allocate a new probe 206221: libblkid: LOWPROBE: zeroize wiper 206221: libblkid: LOWPROBE: ready for low-probing, offset=0, size=234584276992, zonesize=0 206221: libblkid: LOWPROBE: whole-disk: NO, regfile: NO 206221: libblkid: LOWPROBE: start probe 206221: libblkid: LOWPROBE: zeroize wiper 206221: libblkid: LOWPROBE: chain safeprobe superblocks ENABLED 206221: libblkid: LOWPROBE: --> starting probing loop [SUBLKS idx=-1] 206221: libblkid: LOWPROBE: [0] linux_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: read: off=234584211456 len=64 206221: libblkid: LOWPROBE: read failed: Input/output error 206221: libblkid: LOWPROBE: read: off=234584268800 len=256 206221: libblkid: LOWPROBE: read failed: Input/output error 206221: libblkid: LOWPROBE: read: off=0 len=256 206221: libblkid: LOWPROBE: read: off=4096 len=256 206221: libblkid: LOWPROBE: [1] ddf_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: read: off=234584276480 len=512 206221: libblkid: LOWPROBE: read failed: Input/output error 206221: libblkid: LOWPROBE: [2] isw_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [3] lsi_mega_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [4] via_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [5] silicon_medley_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [6] nvidia_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [7] promise_fasttrack_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [8] hpt45x_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [9] hpt37x_raid_member: 206221: libblkid: LOWPROBE: read: off=4096 len=1024 206221: libblkid: BUFFER: reuse: off=4096 len=1024 (for off=4096 len=1024) 206221: libblkid: LOWPROBE: [10] adaptec_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [11] jmicron_raid_member: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: [12] bcache: 206221: libblkid: BUFFER: reuse: off=4096 len=1024 (for off=4096 len=1024) 206221: libblkid: LOWPROBE: [13] bcachefs: 206221: libblkid: BUFFER: reuse: off=4096 len=1024 (for off=4096 len=1024) 206221: libblkid: BUFFER: reuse: off=4096 len=1024 (for off=4096 len=1024) 206221: libblkid: LOWPROBE: [14] ceph_bluestore: 206221: libblkid: LOWPROBE: read: off=0 len=1024 206221: libblkid: LOWPROBE: [15] drbd: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: LOWPROBE: read: off=234584272896 len=104 206221: libblkid: LOWPROBE: read failed: Input/output error 206221: libblkid: LOWPROBE: read: off=234584272896 len=1392 206221: libblkid: LOWPROBE: read failed: Input/output error 206221: libblkid: LOWPROBE: [16] drbdmanage_control_volume: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [17] drbdproxy_datalog: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [18] LVM2_member: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: read: off=1024 len=1024 206221: libblkid: BUFFER: reuse: off=1024 len=1024 (for off=1024 len=1024) 206221: libblkid: LOWPROBE: [19] LVM1_member: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [20] DM_snapshot_cow: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [21] DM_verity_hash: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [22] DM_integrity: 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: [23] crypto_LUKS: 206221: libblkid: LOWPROBE: call probefunc() 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 206221: libblkid: LOWPROBE: assigning VERSION [superblocks] 206221: libblkid: LOWPROBE: assigning UUID [superblocks] 206221: libblkid: LOWPROBE: assigning LABEL [superblocks] 206221: libblkid: LOWPROBE: free value LABEL 206221: libblkid: LOWPROBE: assigning SUBSYSTEM [superblocks] 206221: libblkid: LOWPROBE: assigning TYPE [superblocks] 206221: libblkid: LOWPROBE: assigning USAGE [superblocks] 206221: libblkid: LOWPROBE: <-- leaving probing loop (type=crypto_LUKS) [SUBLKS idx=23] 206221: libblkid: LOWPROBE: freeing values list 206221: libblkid: LOWPROBE: chain safeprobe topology DISABLED 206221: libblkid: LOWPROBE: chain safeprobe partitions ENABLED 206221: libblkid: LOWPROBE: Resetting partitions values 206221: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1] 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: gpt: ---> call probefunc() 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 206221: libblkid: LOWPROBE: gpt: <--- (rc = 1) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: ultrix: ---> call probefunc() 206221: libblkid: LOWPROBE: read: off=15872 len=512 206221: libblkid: LOWPROBE: ultrix: <--- (rc = 1) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: read: off=28672 len=1024 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: atari: ---> call probefunc() 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 206221: libblkid: LOWPROBE: atari: <--- (rc = 1) 206221: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12] 206221: libblkid: LOWPROBE: parts: start probing for partition entry 206221: libblkid: DEVNO: found devno 0x0830 as /dev/sdd 206221: libblkid: LOWPROBE: allocate a wholedisk probe 206221: libblkid: LOWPROBE: allocate a new probe 206221: libblkid: LOWPROBE: zeroize wiper 206221: libblkid: LOWPROBE: ready for low-probing, offset=0, size=256060514304, zonesize=0 206221: libblkid: LOWPROBE: whole-disk: YES, regfile: NO 206221: libblkid: LOWPROBE: partlist reset 206221: libblkid: LOWPROBE: parts: initialized partitions list (size=0) 206221: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1] 206221: libblkid: LOWPROBE: read: off=0 len=1024 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 206221: libblkid: LOWPROBE: magic sboff=510, kboff=0 206221: libblkid: LOWPROBE: dos: ---> call probefunc() 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 206221: libblkid: LOWPROBE: probably GPT -- ignore 206221: libblkid: LOWPROBE: dos: <--- (rc = 1) 206221: libblkid: LOWPROBE: gpt: ---> call probefunc() 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 206221: libblkid: LOWPROBE: #1 valid PMBR partition 206221: libblkid: LOWPROBE: checking for GPT header at 1 206221: libblkid: BUFFER: reuse: off=0 len=1024 (for off=512 len=512) 206221: libblkid: LOWPROBE: read: off=1024 len=16384 206221: libblkid: LOWPROBE: parts: create a new partition table (type=gpt, offset=512) 206221: libblkid: LOWPROBE: parts: add partition (start=2048, size=41943040) 206221: libblkid: LOWPROBE: parts: add partition (start=41945088, size=458172416) 206221: libblkid: LOWPROBE: gpt: <--- (rc = 0) 206221: libblkid: LOWPROBE: <-- leaving probing loop (type=gpt) [PARTS idx=4] 206221: libblkid: LOWPROBE: partitions probe done [rc=0] 206221: libblkid: LOWPROBE: returning partitions binary data 206221: libblkid: LOWPROBE: trying to convert devno 0x832 to partition 206221: libblkid: LOWPROBE: searching by offset/size 206221: libblkid: LOWPROBE: assigning PART_ENTRY_SCHEME [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_UUID [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_TYPE [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_NUMBER [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_OFFSET [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_SIZE [partitions] 206221: libblkid: LOWPROBE: assigning PART_ENTRY_DISK [partitions] 206221: libblkid: LOWPROBE: parts: end probing for partition entry [success] 206221: libblkid: LOWPROBE: partitions probe done [rc=0] 206221: libblkid: LOWPROBE: end probe 206221: libblkid: LOWPROBE: zeroize wiper 206221: libblkid: LOWPROBE: returning VERSION value 206221: libblkid: LOWPROBE: returning UUID value 206221: libblkid: LOWPROBE: returning SUBSYSTEM value 206221: libblkid: LOWPROBE: returning TYPE value 206221: libblkid: LOWPROBE: returning USAGE value 206221: libblkid: LOWPROBE: returning PART_ENTRY_SCHEME value 206221: libblkid: LOWPROBE: returning PART_ENTRY_UUID value 206221: libblkid: LOWPROBE: returning PART_ENTRY_TYPE value 206221: libblkid: LOWPROBE: returning PART_ENTRY_NUMBER value 206221: libblkid: LOWPROBE: returning PART_ENTRY_OFFSET value 206221: libblkid: LOWPROBE: returning PART_ENTRY_SIZE value 206221: libblkid: LOWPROBE: returning PART_ENTRY_DISK value /dev/sdd2: VERSION="2" UUID="a918f1d0-f1de-44f5-9d93-ce9dc15cc2c7" SUBSYSTEM="HW-OPAL" TYPE="crypto_LUKS" USAGE="crypto" PART_ENTRY_SCHEME="gpt" PART_ENTRY_UUID="39ed5135-46e4-ca44-837e-da3c0781367b" PART_ENTRY_TYPE="0fc63daf-8483-4772-8e79-3d69d8477de4" PART_ENTRY_NUMBER="2" PART_ENTRY_OFFSET="41945088" PART_ENTRY_SIZE="458172416" PART_ENTRY_DISK="8:48" 206221: libblkid: BUFFER: Resetting probing buffers 206221: libblkid: BUFFER: remove buffer: [off=0, len=256] 206221: libblkid: BUFFER: remove buffer: [off=4096, len=256] 206221: libblkid: BUFFER: remove buffer: [off=4096, len=1024] 206221: libblkid: BUFFER: remove buffer: [off=0, len=1024] 206221: libblkid: BUFFER: remove buffer: [off=1024, len=1024] 206221: libblkid: BUFFER: remove buffer: [off=15872, len=512] 206221: libblkid: BUFFER: remove buffer: [off=28672, len=1024] 206221: libblkid: LOWPROBE: buffers summary: 5120 bytes by 7 read() calls 206221: libblkid: LOWPROBE: resetting results 206221: libblkid: LOWPROBE: free value VERSION 206221: libblkid: LOWPROBE: free value UUID 206221: libblkid: LOWPROBE: free value SUBSYSTEM 206221: libblkid: LOWPROBE: free value TYPE 206221: libblkid: LOWPROBE: free value USAGE 206221: libblkid: LOWPROBE: free value PART_ENTRY_SCHEME 206221: libblkid: LOWPROBE: free value PART_ENTRY_UUID 206221: libblkid: LOWPROBE: free value PART_ENTRY_TYPE 206221: libblkid: LOWPROBE: free value PART_ENTRY_NUMBER 206221: libblkid: LOWPROBE: free value PART_ENTRY_OFFSET 206221: libblkid: LOWPROBE: free value PART_ENTRY_SIZE 206221: libblkid: LOWPROBE: free value PART_ENTRY_DISK 206221: libblkid: BUFFER: Resetting probing buffers 206221: libblkid: BUFFER: remove buffer: [off=0, len=1024] 206221: libblkid: BUFFER: remove buffer: [off=1024, len=16384] 206221: libblkid: LOWPROBE: buffers summary: 17408 bytes by 2 read() calls 206221: libblkid: LOWPROBE: free probe 206221: libblkid: LOWPROBE: free probe Signed-off-by: Luca Boccassi <bluca@debian.org> 
Use the appropriate ioctl, if available, to check if a device is locked
when we get an I/O error. Save the information so that we don't have to
repeat the ioctl.

Before:

LIBBLKID_DEBUG=all blkid -p /dev/sdd2
206326: libblkid:     INIT: library debug mask: 0xffff
206326: libblkid:     INIT: library version: 2.38.1 [04-Aug-2022]
Available "LIBBLKID_DEBUG=<name>[,...]|<mask>" debug masks:
   all      [0xffff] : info about all subsystems
   cache    [0x0004] : blkid tags cache
   config   [0x0008] : config file utils
   dev      [0x0010] : device utils
   devname  [0x0020] : /proc/partitions evaluation
   devno    [0x0040] : conversions to device name
   evaluate [0x0080] : tags resolving
   help     [0x0001] : this help
   lowprobe [0x0100] : superblock/raids/partitions probing
   buffer   [0x2000] : low-probing buffers
   probe    [0x0200] : devices verification
   read     [0x0400] : cache parsing
   save     [0x0800] : cache writing
   tag      [0x1000] : tags utils
206326: libblkid: LOWPROBE: allocate a new probe
206326: libblkid: LOWPROBE: zeroize wiper
206326: libblkid: LOWPROBE: ready for low-probing, offset=0, size=234584276992, zonesize=0
206326: libblkid: LOWPROBE: whole-disk: NO, regfile: NO
206326: libblkid: LOWPROBE: start probe
206326: libblkid: LOWPROBE: zeroize wiper
206326: libblkid: LOWPROBE: chain safeprobe superblocks ENABLED
206326: libblkid: LOWPROBE: --> starting probing loop [SUBLKS idx=-1]
206326: libblkid: LOWPROBE: [0] linux_raid_member:
206326: libblkid: LOWPROBE: 	call probefunc()
206326: libblkid: LOWPROBE: 	read: off=234584211456 len=64
206326: libblkid: LOWPROBE: 	read failed: Input/output error
206326: libblkid: LOWPROBE: <-- leaving probing loop (failed=-5) [SUBLKS idx=0]
206326: libblkid: LOWPROBE: freeing values list
206326: libblkid: LOWPROBE: end probe
206326: libblkid: LOWPROBE: zeroize wiper
206326: libblkid: LOWPROBE: free probe

After:

LIBBLKID_DEBUG=all blkid -p /dev/sdd2
206221: libblkid:     INIT: library debug mask: 0xffff
206221: libblkid:     INIT: library version: 2.38.1119 [28-Mar-2022]
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
206221: libblkid: LOWPROBE: allocate a new probe
206221: libblkid: LOWPROBE: zeroize wiper
206221: libblkid: LOWPROBE: ready for low-probing, offset=0, size=234584276992, zonesize=0
206221: libblkid: LOWPROBE: whole-disk: NO, regfile: NO
206221: libblkid: LOWPROBE: start probe
206221: libblkid: LOWPROBE: zeroize wiper
206221: libblkid: LOWPROBE: chain safeprobe superblocks ENABLED
206221: libblkid: LOWPROBE: --> starting probing loop [SUBLKS idx=-1]
206221: libblkid: LOWPROBE: [0] linux_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: 	read: off=234584211456 len=64
206221: libblkid: LOWPROBE: 	read failed: Input/output error
206221: libblkid: LOWPROBE: 	read: off=234584268800 len=256
206221: libblkid: LOWPROBE: 	read failed: Input/output error
206221: libblkid: LOWPROBE: 	read: off=0 len=256
206221: libblkid: LOWPROBE: 	read: off=4096 len=256
206221: libblkid: LOWPROBE: [1] ddf_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: 	read: off=234584276480 len=512
206221: libblkid: LOWPROBE: 	read failed: Input/output error
206221: libblkid: LOWPROBE: [2] isw_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [3] lsi_mega_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [4] via_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [5] silicon_medley_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [6] nvidia_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [7] promise_fasttrack_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [8] hpt45x_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [9] hpt37x_raid_member:
206221: libblkid: LOWPROBE: 	read: off=4096 len=1024
206221: libblkid:   BUFFER: 	reuse: off=4096 len=1024 (for off=4096 len=1024)
206221: libblkid: LOWPROBE: [10] adaptec_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [11] jmicron_raid_member:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: [12] bcache:
206221: libblkid:   BUFFER: 	reuse: off=4096 len=1024 (for off=4096 len=1024)
206221: libblkid: LOWPROBE: [13] bcachefs:
206221: libblkid:   BUFFER: 	reuse: off=4096 len=1024 (for off=4096 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=4096 len=1024 (for off=4096 len=1024)
206221: libblkid: LOWPROBE: [14] ceph_bluestore:
206221: libblkid: LOWPROBE: 	read: off=0 len=1024
206221: libblkid: LOWPROBE: [15] drbd:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid: LOWPROBE: 	read: off=234584272896 len=104
206221: libblkid: LOWPROBE: 	read failed: Input/output error
206221: libblkid: LOWPROBE: 	read: off=234584272896 len=1392
206221: libblkid: LOWPROBE: 	read failed: Input/output error
206221: libblkid: LOWPROBE: [16] drbdmanage_control_volume:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [17] drbdproxy_datalog:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [18] LVM2_member:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: 	read: off=1024 len=1024
206221: libblkid:   BUFFER: 	reuse: off=1024 len=1024 (for off=1024 len=1024)
206221: libblkid: LOWPROBE: [19] LVM1_member:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [20] DM_snapshot_cow:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [21] DM_verity_hash:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [22] DM_integrity:
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: [23] crypto_LUKS:
206221: libblkid: LOWPROBE: 	call probefunc()
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=512)
206221: libblkid: LOWPROBE: assigning VERSION [superblocks]
206221: libblkid: LOWPROBE: assigning UUID [superblocks]
206221: libblkid: LOWPROBE: assigning LABEL [superblocks]
206221: libblkid: LOWPROBE:  free value LABEL
206221: libblkid: LOWPROBE: assigning SUBSYSTEM [superblocks]
206221: libblkid: LOWPROBE: assigning TYPE [superblocks]
206221: libblkid: LOWPROBE: assigning USAGE [superblocks]
206221: libblkid: LOWPROBE: <-- leaving probing loop (type=crypto_LUKS) [SUBLKS idx=23]
206221: libblkid: LOWPROBE: freeing values list
206221: libblkid: LOWPROBE: chain safeprobe topology DISABLED
206221: libblkid: LOWPROBE: chain safeprobe partitions ENABLED
206221: libblkid: LOWPROBE: Resetting partitions values
206221: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: gpt: ---> call probefunc()
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=512)
206221: libblkid: LOWPROBE: gpt: <--- (rc = 1)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: ultrix: ---> call probefunc()
206221: libblkid: LOWPROBE: 	read: off=15872 len=512
206221: libblkid: LOWPROBE: ultrix: <--- (rc = 1)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: 	read: off=28672 len=1024
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: atari: ---> call probefunc()
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=512)
206221: libblkid: LOWPROBE: atari: <--- (rc = 1)
206221: libblkid: LOWPROBE: <-- leaving probing loop (failed=1) [PARTS idx=12]
206221: libblkid: LOWPROBE: parts: start probing for partition entry
206221: libblkid:    DEVNO: found devno 0x0830 as /dev/sdd
206221: libblkid: LOWPROBE: allocate a wholedisk probe
206221: libblkid: LOWPROBE: allocate a new probe
206221: libblkid: LOWPROBE: zeroize wiper
206221: libblkid: LOWPROBE: ready for low-probing, offset=0, size=256060514304, zonesize=0
206221: libblkid: LOWPROBE: whole-disk: YES, regfile: NO
206221: libblkid: LOWPROBE: partlist reset
206221: libblkid: LOWPROBE: parts: initialized partitions list (size=0)
206221: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1]
206221: libblkid: LOWPROBE: 	read: off=0 len=1024
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=1024)
206221: libblkid: LOWPROBE: 	magic sboff=510, kboff=0
206221: libblkid: LOWPROBE: dos: ---> call probefunc()
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=512)
206221: libblkid: LOWPROBE: probably GPT -- ignore
206221: libblkid: LOWPROBE: dos: <--- (rc = 1)
206221: libblkid: LOWPROBE: gpt: ---> call probefunc()
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=0 len=512)
206221: libblkid: LOWPROBE:  #1 valid PMBR partition
206221: libblkid: LOWPROBE:  checking for GPT header at 1
206221: libblkid:   BUFFER: 	reuse: off=0 len=1024 (for off=512 len=512)
206221: libblkid: LOWPROBE: 	read: off=1024 len=16384
206221: libblkid: LOWPROBE: parts: create a new partition table (type=gpt, offset=512)
206221: libblkid: LOWPROBE: parts: add partition (start=2048, size=41943040)
206221: libblkid: LOWPROBE: parts: add partition (start=41945088, size=458172416)
206221: libblkid: LOWPROBE: gpt: <--- (rc = 0)
206221: libblkid: LOWPROBE: <-- leaving probing loop (type=gpt) [PARTS idx=4]
206221: libblkid: LOWPROBE: partitions probe done [rc=0]
206221: libblkid: LOWPROBE: returning partitions binary data
206221: libblkid: LOWPROBE: trying to convert devno 0x832 to partition
206221: libblkid: LOWPROBE: searching by offset/size
206221: libblkid: LOWPROBE: assigning PART_ENTRY_SCHEME [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_UUID [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_TYPE [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_NUMBER [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_OFFSET [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_SIZE [partitions]
206221: libblkid: LOWPROBE: assigning PART_ENTRY_DISK [partitions]
206221: libblkid: LOWPROBE: parts: end probing for partition entry [success]
206221: libblkid: LOWPROBE: partitions probe done [rc=0]
206221: libblkid: LOWPROBE: end probe
206221: libblkid: LOWPROBE: zeroize wiper
206221: libblkid: LOWPROBE: returning VERSION value
206221: libblkid: LOWPROBE: returning UUID value
206221: libblkid: LOWPROBE: returning SUBSYSTEM value
206221: libblkid: LOWPROBE: returning TYPE value
206221: libblkid: LOWPROBE: returning USAGE value
206221: libblkid: LOWPROBE: returning PART_ENTRY_SCHEME value
206221: libblkid: LOWPROBE: returning PART_ENTRY_UUID value
206221: libblkid: LOWPROBE: returning PART_ENTRY_TYPE value
206221: libblkid: LOWPROBE: returning PART_ENTRY_NUMBER value
206221: libblkid: LOWPROBE: returning PART_ENTRY_OFFSET value
206221: libblkid: LOWPROBE: returning PART_ENTRY_SIZE value
206221: libblkid: LOWPROBE: returning PART_ENTRY_DISK value
/dev/sdd2: VERSION="2" UUID="a918f1d0-f1de-44f5-9d93-ce9dc15cc2c7" SUBSYSTEM="HW-OPAL" TYPE="crypto_LUKS" USAGE="crypto" PART_ENTRY_SCHEME="gpt" PART_ENTRY_UUID="39ed5135-46e4-ca44-837e-da3c0781367b" PART_ENTRY_TYPE="0fc63daf-8483-4772-8e79-3d69d8477de4" PART_ENTRY_NUMBER="2" PART_ENTRY_OFFSET="41945088" PART_ENTRY_SIZE="458172416" PART_ENTRY_DISK="8:48"
206221: libblkid:   BUFFER: Resetting probing buffers
206221: libblkid:   BUFFER:  remove buffer: [off=0, len=256]
206221: libblkid:   BUFFER:  remove buffer: [off=4096, len=256]
206221: libblkid:   BUFFER:  remove buffer: [off=4096, len=1024]
206221: libblkid:   BUFFER:  remove buffer: [off=0, len=1024]
206221: libblkid:   BUFFER:  remove buffer: [off=1024, len=1024]
206221: libblkid:   BUFFER:  remove buffer: [off=15872, len=512]
206221: libblkid:   BUFFER:  remove buffer: [off=28672, len=1024]
206221: libblkid: LOWPROBE:  buffers summary: 5120 bytes by 7 read() calls
206221: libblkid: LOWPROBE: resetting results
206221: libblkid: LOWPROBE:  free value VERSION
206221: libblkid: LOWPROBE:  free value UUID
206221: libblkid: LOWPROBE:  free value SUBSYSTEM
206221: libblkid: LOWPROBE:  free value TYPE
206221: libblkid: LOWPROBE:  free value USAGE
206221: libblkid: LOWPROBE:  free value PART_ENTRY_SCHEME
206221: libblkid: LOWPROBE:  free value PART_ENTRY_UUID
206221: libblkid: LOWPROBE:  free value PART_ENTRY_TYPE
206221: libblkid: LOWPROBE:  free value PART_ENTRY_NUMBER
206221: libblkid: LOWPROBE:  free value PART_ENTRY_OFFSET
206221: libblkid: LOWPROBE:  free value PART_ENTRY_SIZE
206221: libblkid: LOWPROBE:  free value PART_ENTRY_DISK
206221: libblkid:   BUFFER: Resetting probing buffers
206221: libblkid:   BUFFER:  remove buffer: [off=0, len=1024]
206221: libblkid:   BUFFER:  remove buffer: [off=1024, len=16384]
206221: libblkid: LOWPROBE:  buffers summary: 17408 bytes by 2 read() calls
206221: libblkid: LOWPROBE: free probe
206221: libblkid: LOWPROBE: free probe

Signed-off-by: Luca Boccassi <bluca@debian.org>