Your message dated Wed, 09 May 2018 16:00:42 +0200
with message-id <[email protected]>
and subject line Re: Bug#898262: sfdisk: wrong offset calculation
has caused the Debian Bug report #898262,
regarding sfdisk: wrong offset calculation
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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--
898262: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898262
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: fdisk
Version: 2.31.1-0.5
Severity: normal
Hi,
I think I found a bug in sfdisk (or rather in libfdisk). I'm trying to
(programmatically) add a partition filling the whole free space on an
64G sdcard after burning a raspbian lite image on it.
Device preparation:
wget https://downloads.raspberrypi.org/raspbian_lite_latest
unzip rasbian_lite_latest
dd if=2018-04-18-raspbian-stretch-lite.img of=/dev/mmcblk0 bs=4M conv=fsync
The resulting partition table on the sdcard is:
sfdisk -d /dev/mmcblk0
label: dos
label-id: 0xc7cb7e34
device: /dev/mmcblk0
unit: sectors
/dev/mmcblk0p1 : start= 8192, size= 88262, type=c
/dev/mmcblk0p2 : start= 98304, size= 3538944, type=83
There's approximately 58G available at the end of the device (from cyl
3538944 to 125042688).
According to the manpage, I think adding a new partition for a vfat
filesystem filling the free space could be done with:
echo "type=c" | sfdisk -a /dev/mmcblk0
But it doesn't seem to work:
echo "type=c" | sfdisk -an /dev/mmcblk0
Disk /dev/mmcblk0: 59.6 GiB, 64021856256 bytes, 125042688 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xc7cb7e34
Old situation:
Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 8192 96453 88262 43.1M c W95 FAT32 (LBA)
/dev/mmcblk0p2 98304 3637247 3538944 1.7G 83 Linux
/dev/mmcblk0p3: Created a new partition 3 of type 'W95 FAT32 (LBA)' and of size
3 MiB.
/dev/mmcblk0p4: Done.
New situation:
Disklabel type: dos
Disk identifier: 0xc7cb7e34
Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 8192 96453 88262 43.1M c W95 FAT32 (LBA)
/dev/mmcblk0p2 98304 3637247 3538944 1.7G 83 Linux
/dev/mmcblk0p3 2048 8191 6144 3M c W95 FAT32 (LBA)
Partition table entries are not in disk order.
The partition table is unchanged (--no-act).
The log with LIBFDISK_DEBUG=all is attached in full, but here is the
excerpt:
13671: libfdisk: LABEL: DOS: adding partition 2
13671: libfdisk: LABEL: DOS: last possible sector for #2 is 125042687
13671: libfdisk: CXT: [0x632cdf814110]: LBA 2048 already aligned
13671: libfdisk: CXT: [0x632cdf814110]: LBA 125042687 aligned-down
125040640 [grain=2048s]
13671: libfdisk: CXT: [0x632cdf814110]: LBA 2048 already aligned
13671: libfdisk: CXT: [0x632cdf814110]: 2048 in range <2048..125040640>
aligned to 2048
13671: libfdisk: LABEL: DOS: start is 2048
13671: libfdisk: LABEL: DOS: last possible sector for #2 is 125042687
13671: libfdisk: LABEL: DOS: unused sector for #2 is 8191
13671: libfdisk: LABEL: DOS: raw stop: 8191 [limit 8191]
13671: libfdisk: LABEL: DOS: setting partition 2, offset=0, start=2048,
size=6144, sysid=0c
13671: libfdisk: LABEL: DOS: setting 2 partition to changed
13671: libfdisk: ASK: [0x632cdf81caf0]: alloc
13671: libfdisk: ASK: [0x632cdf81caf0]: do_ask for 'info'
/dev/mmcblk0p3: Created a new partition 3 of type 'W95 FAT32 (LBA)' and of size
3 MiB.
If you need more information, please ask.
Regards,
--
Yves-Alexis
-- System Information:
Debian Release: buster/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (450, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.15.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8),
LANGUAGE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages fdisk depends on:
ii libc6 2.27-3
ii libfdisk1 2.31.1-0.5
ii libmount1 2.31.1-0.5
ii libncursesw5 6.1+20180210-2
ii libsmartcols1 2.31.1-0.5
ii libtinfo5 6.1+20180210-2
fdisk recommends no packages.
fdisk suggests no packages.
-- no debconf information
13774: libfdisk: INIT: library debug mask: 0xffff
13774: libfdisk: INIT: library version: 2.31.1
Available "LIBFDISK_DEBUG=<name>[,...]|<mask>" debug masks:
all [0xffff] : info about all subsystems
ask [0x0010] : fdisk dialogs
help [0x0001] : this help
cxt [0x0004] : library context (handler)
label [0x0008] : disk label utils
part [0x0040] : partition utils
parttype [0x0080] : partition type utils
script [0x0200] : sfdisk-like scripts
tab [0x0100] : table utils
wipe [0x0400] : wipe area utils
item [0x0400] : disklabel items
13774: libfdisk: CXT: [0x56bf399ef110]: alloc
13774: libfdisk: CXT: [0x56bf399ef110]: assigning device /dev/mmcblk0
13774: libfdisk: CXT: [0x56bf399ef110]: *** resetting context
13774: libfdisk: CXT: [0x56bf399ef110]: /dev/mmcblk0: discovering
topology...
13774: libfdisk: CXT: [0x56bf399ef110]: initialize libblkid prober
13774: libfdisk: CXT: [0x56bf399ef110]: result: log/phy sector size:
512/512
13774: libfdisk: CXT: [0x56bf399ef110]: result: fdisk/optimal/minimal io:
512/0/512
13774: libfdisk: CXT: [0x56bf399ef110]: /dev/mmcblk0: discovering
geometry...
13774: libfdisk: CXT: [0x56bf399ef110]: total sectors: 125042688
(ioctl=125042688)
13774: libfdisk: CXT: [0x56bf399ef110]: result: C/H/S: 1953792/4/16
13774: libfdisk: CXT: [0x56bf399ef110]: applying user device properties
13774: libfdisk: CXT: [0x56bf399ef110]: resetting alignment...
13774: libfdisk: CXT: [0x56bf399ef110]: alignment reset to: first
LBA=2048, last LBA=125042687, grain=1048576 [rc=0]
13774: libfdisk: CXT: [0x56bf399ef110]: initialize in-memory first sector
buffer [sector_size=512]
13774: libfdisk: CXT: [0x56bf399ef110]: reading: offset=0, size=512
13774: libfdisk: CXT: [0x56bf399ef110]: new C/H/S: 1953792/4/16
13774: libfdisk: CXT: [0x56bf399ef110]: new log/phy sector size: 512/512
13774: libfdisk: CXT: [0x56bf399ef110]: zeroize in-memory first sector
buffer
13774: libfdisk: CXT: [0x56bf399ef110]: reading: offset=0, size=512
13774: libfdisk: CXT: [0x56bf399ef110]: probing for gpt
13774: libfdisk: LABEL: GPT probe failed
13774: libfdisk: CXT: [0x56bf399ef110]: probing for dos
13774: libfdisk: LABEL: DOS: initialize, first sector buffer 0x56bf399f5d00
13774: libfdisk: LABEL: DOS: initialize: #1 start=8192 size=88262 sysid=0c
13774: libfdisk: LABEL: DOS: initialize: #2 start=98304 size=3538944 sysid=83
13774: libfdisk: LABEL: DOS: initialize: #3 start=0 size=0 sysid=00
13774: libfdisk: LABEL: DOS: initialize: #4 start=0 size=0 sysid=00
13774: libfdisk: LABEL: DOS PT geometry: heads=0, sectors=0
13774: libfdisk: CXT: [0x56bf399ef110]: --> switching context to dos!
13774: libfdisk: CXT: [0x56bf399ef110]: appling label device properties...
13774: libfdisk: CXT: [0x56bf399ef110]: initialized for /dev/mmcblk0
[READ-WRITE]
13774: libfdisk: SCRIPT: [0x56bf399efff0]: alloc
13774: libfdisk: TAB: [0x56bf399f0050]: alloc
13774: libfdisk: CXT: [0x56bf399ef110]: setting reference to script
0x56bf399efff0
13774: libfdisk: PART: [0x56bf399f5f10]: alloc
13774: libfdisk: PART: [0x56bf399f5f10]: reset
13774: libfdisk: PART: [0x56bf399f5f10]: reset
13774: libfdisk: PART: [0x56bf399f5f10]: free
13774: libfdisk: ASK: [0x56bf399f6670]: alloc
13774: libfdisk: ASK: [0x56bf399f6670]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6670]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6670]: reset
13774: libfdisk: ASK: [0x56bf399f6670]: free
13774: libfdisk: ASK: [0x56bf399f6740]: alloc
13774: libfdisk: ASK: [0x56bf399f6740]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6740]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6740]: reset
13774: libfdisk: ASK: [0x56bf399f6740]: free
13774: libfdisk: ASK: [0x56bf399f67a0]: alloc
13774: libfdisk: ASK: [0x56bf399f67a0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f67a0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f67a0]: reset
13774: libfdisk: ASK: [0x56bf399f67a0]: free
13774: libfdisk: ASK: [0x56bf399f6870]: alloc
13774: libfdisk: ASK: [0x56bf399f6870]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6870]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6870]: reset
13774: libfdisk: ASK: [0x56bf399f6870]: free
13774: libfdisk: ASK: [0x56bf399f6940]: alloc
13774: libfdisk: ASK: [0x56bf399f6940]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6940]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6940]: reset
13774: libfdisk: ASK: [0x56bf399f6940]: free
13774: libfdisk: CXT: [0x56bf399ef110]: asking for disk dos ID
13774: libfdisk: CXT: [0x56bf399ef110]: asking for disk dos item 0
13774: libfdisk: ASK: [0x56bf399f69a0]: alloc
13774: libfdisk: ASK: [0x56bf399f69a0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f69a0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f69a0]: reset
13774: libfdisk: ASK: [0x56bf399f69a0]: free
13774: libfdisk: ASK: [0x56bf399f6a00]: alloc
13774: libfdisk: ASK: [0x56bf399f6a00]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6a00]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6a00]: reset
13774: libfdisk: ASK: [0x56bf399f6a00]: free
13774: libfdisk: CXT: [0x56bf399ef110]: -- get table --
13774: libfdisk: TAB: [0x56bf399f6a60]: alloc
13774: libfdisk: PART: [0x56bf399f6a90]: alloc
13774: libfdisk: TAB: [0x56bf399f6a60]: add entry 0x56bf399f6a90
[start=8192, end=96453, size=88262, primary]
13774: libfdisk: PART: [0x56bf399f6b50]: alloc
13774: libfdisk: TAB: [0x56bf399f6a60]: add entry 0x56bf399f6b50
[start=98304, end=3637247, size=3538944, primary]
13774: libfdisk: ASK: [0x56bf399f7af0]: alloc
13774: libfdisk: ASK: [0x56bf399f7af0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f7af0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f7af0]: reset
13774: libfdisk: ASK: [0x56bf399f7af0]: free
13774: libfdisk: TAB: [0x56bf399f6a60]: wrong older check
13774: libfdisk: TAB: [0x56bf399f6a60]: reset
13774: libfdisk: TAB: [0x56bf399f6a60]: remove entry 0x56bf399f6a90
13774: libfdisk: PART: [0x56bf399f6a90]: reset
13774: libfdisk: PART: [0x56bf399f6a90]: free
13774: libfdisk: TAB: [0x56bf399f6a60]: remove entry 0x56bf399f6b50
13774: libfdisk: PART: [0x56bf399f6b50]: reset
13774: libfdisk: PART: [0x56bf399f6b50]: free
13774: libfdisk: TAB: [0x56bf399f6a60]: free
13774: libfdisk: SCRIPT: [0x56bf399efff0]: setting new header label='dos'
13774: libfdisk: SCRIPT: [0x56bf399efff0]: parsing line 0
13774: libfdisk: SCRIPT: [0x56bf399efff0]: parsing buffer
13774: libfdisk: SCRIPT: [0x56bf399efff0]: parse script line: 'type=c'
13774: libfdisk: PART: [0x56bf399f79f0]: alloc
13774: libfdisk: SCRIPT: [0x56bf399efff0]: parsing 'type=c'
13774: libfdisk: SCRIPT: [0x56bf399efff0]: label 'dos'
13774: libfdisk: LABEL: [0x56bf399ef370]: parsing 'c' (dos) partition type
13774: libfdisk: PARTTYPE: [0x7ac35c379040]: returns parsed 'W95 FAT32 (LBA)'
[] partition type
13774: libfdisk: TAB: [0x56bf399f0050]: add entry 0x56bf399f79f0
[start=18446744073709551615, end=18446744073709551613,
size=18446744073709551615, primary]
13774: libfdisk: CXT: [0x56bf399ef110]: adding new partition 0x56bf399f79f0
13774: libfdisk: CXT: [0x56bf399ef110]: defaults: start=yes, end=yes,
partno=yes
13774: libfdisk: LABEL: DOS: new partition wanted
13774: libfdisk: LABEL: DOS: dialog driven partitioning
13774: libfdisk: PART: [0x56bf399f79f0]: next partno (follow default)
13774: libfdisk: LABEL: DOS: adding partition 2
13774: libfdisk: LABEL: DOS: last possible sector for #2 is 125042687
13774: libfdisk: CXT: [0x56bf399ef110]: LBA 2048 already aligned
13774: libfdisk: CXT: [0x56bf399ef110]: LBA 125042687 aligned-down
125040640 [grain=2048s]
13774: libfdisk: CXT: [0x56bf399ef110]: LBA 2048 already aligned
13774: libfdisk: CXT: [0x56bf399ef110]: 2048 in range <2048..125040640>
aligned to 2048
13774: libfdisk: LABEL: DOS: start is 2048
13774: libfdisk: LABEL: DOS: last possible sector for #2 is 125042687
13774: libfdisk: LABEL: DOS: unused sector for #2 is 8191
13774: libfdisk: LABEL: DOS: raw stop: 8191 [limit 8191]
13774: libfdisk: LABEL: DOS: setting partition 2, offset=0, start=2048,
size=6144, sysid=0c
13774: libfdisk: LABEL: DOS: setting 2 partition to changed
13774: libfdisk: ASK: [0x56bf399f7af0]: alloc
13774: libfdisk: ASK: [0x56bf399f7af0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f7af0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f7af0]: reset
13774: libfdisk: ASK: [0x56bf399f7af0]: free
13774: libfdisk: CXT: [0x56bf399ef110]: add partition done (rc=0)
13774: libfdisk: PART: [0x56bf399f7630]: alloc
13774: libfdisk: PART: [0x56bf399f7630]: start probe #2 partition [cxt
0x56bf399ef110] >>>
13774: libfdisk: PART: [0x56bf399f7630]: blkid prober: 0x56bf399f90b0
13774: libfdisk: PART: [0x56bf399f7630]: <<< end probe #2 partition[cxt
0x56bf399ef110, rc=1]
13774: libfdisk: PART: [0x56bf399f7630]: reset
13774: libfdisk: PART: [0x56bf399f7630]: free
13774: libfdisk: SCRIPT: [0x56bf399efff0]: parsing line 1
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: CXT: [0x56bf399ef110]: asking for disk dos ID
13774: libfdisk: CXT: [0x56bf399ef110]: asking for disk dos item 0
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: CXT: [0x56bf399ef110]: -- get table --
13774: libfdisk: TAB: [0x56bf399f76f0]: alloc
13774: libfdisk: PART: [0x56bf399f9c80]: alloc
13774: libfdisk: TAB: [0x56bf399f76f0]: add entry 0x56bf399f9c80
[start=8192, end=96453, size=88262, primary]
13774: libfdisk: PART: [0x56bf399f9d40]: alloc
13774: libfdisk: TAB: [0x56bf399f76f0]: add entry 0x56bf399f9d40
[start=98304, end=3637247, size=3538944, primary]
13774: libfdisk: PART: [0x56bf399f9e00]: alloc
13774: libfdisk: TAB: [0x56bf399f76f0]: add entry 0x56bf399f9e00
[start=2048, end=8191, size=6144, primary]
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: TAB: [0x56bf399f76f0]: wrong older check
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: TAB: [0x56bf399f76f0]: reset
13774: libfdisk: TAB: [0x56bf399f76f0]: remove entry 0x56bf399f9c80
13774: libfdisk: PART: [0x56bf399f9c80]: reset
13774: libfdisk: PART: [0x56bf399f9c80]: free
13774: libfdisk: TAB: [0x56bf399f76f0]: remove entry 0x56bf399f9d40
13774: libfdisk: PART: [0x56bf399f9d40]: reset
13774: libfdisk: PART: [0x56bf399f9d40]: free
13774: libfdisk: TAB: [0x56bf399f76f0]: remove entry 0x56bf399f9e00
13774: libfdisk: PART: [0x56bf399f9e00]: reset
13774: libfdisk: PART: [0x56bf399f9e00]: free
13774: libfdisk: TAB: [0x56bf399f76f0]: free
13774: libfdisk: ASK: [0x56bf399f6dc0]: alloc
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask for 'info'
13774: libfdisk: ASK: [0x56bf399f6dc0]: do_ask done [rc=0]
13774: libfdisk: ASK: [0x56bf399f6dc0]: reset
13774: libfdisk: ASK: [0x56bf399f6dc0]: free
13774: libfdisk: CXT: [0x56bf399ef110]: de-assigning device /dev/mmcblk0
--- End Message ---
--- Begin Message ---
On Wed, 2018-05-09 at 08:49 -0400, Phil Susi wrote:
> On 5/9/2018 7:34 AM, Yves-Alexis Perez wrote:
> > There's approximately 58G available at the end of the device (from cyl
> > 3538944 to 125042688).
Hi, thanks for your reply.
>
> Yes, but there is also 3 mb near the beginning of the device.
Duh, that's a good point, I missed that, or actually dismissed it as just
alignment noise.
>
> > According to the manpage, I think adding a new partition for a vfat
> > filesystem filling the free space could be done with:
> >
> > echo "type=c" | sfdisk -a /dev/mmcblk0
>
> You didn't specify where the partition should start.
Because I don't want to. Ideally the command line shouldn't rely on the
current layout, and should just add a new partition filling the whole space.
>
> > Device Boot Start End Sectors Size Id Type
> > /dev/mmcblk0p1 8192 96453 88262 43.1M c W95 FAT32 (LBA)
> > /dev/mmcblk0p2 98304 3637247 3538944 1.7G 83 Linux
> > /dev/mmcblk0p3 2048 8191 6144 3M c W95 FAT32 (LBA)
>
> So it started at the beginning and went as far as it could. I'm not
> sure where you think the bug is.
In that new light, it does seem that there is no bug indeed. Unfortunately it
doesn't seem that I can specify alignment constraints (like in parted) and
there is also no way to tell sfdisk “I want a partition starting *after* all
others” or “I want a partition *at least* that large”.
The provided solution doesn't make any sense but the offset calculations are
indeed correct. I'm closing the bug then in order to not confuse other people.
Regards,
--
Yves-Alexis
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