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New: e2fsprogs: mke2fs ignores sparse_super2 when also using extent or 64bit

Bug 117421 [email protected] 1 participant 4 messages Apr 30, 2016 – May 10, 2016

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https://bugzilla.kernel.org/show_bug.cgi?id=117421

Bug ID: 117421
Summary: e2fsprogs: mke2fs ignores sparse_super2 when also
using extent or 64bit
Product: File System
Version: 2.5
Kernel Version: 4.2.8
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
Assignee: [email protected]
Reporter: [email protected]
Regression: No

Package: e2fsprogs
Version: 1.42.12-1.1
Severity: normal
File: /sbin/mke2fs

When creating an ext3/ext4 filesystem the sparse_super2 option is ignored and defaults back to sparse_super when using extent or 64bit.
mke2fs should respect the use of sparse_super2 when using either or both -O extent or -O 64bit.

Normal formatting using sparse_super and works as expected creating 2 backup superblocks.

mke2fs /dev/sdq1 -t ext4 -b 4096 -O sparse_super2 mke2fs 1.42.12 (29-Aug-2014)
Creating filesystem with 61049344 4k blocks and 15269888 inodes Filesystem UUID: cdaa09a3-dcb2-473a-9da8-7517a632db14 Superblock backups stored on blocks:

        32768, 61046784

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

Using extent option with sparse_super2 creates more than 2 backup superblocks.

mke2fs /dev/sdq1 -t ext4 -b 4096 -O sparse_super2 -O extent mke2fs 1.42.12 (29-Aug-2014)
Creating filesystem with 61049344 4k blocks and 15269888 inodes Filesystem UUID: 4634627d-bd41-4f96-923d-21746f12cf1f Superblock backups stored on blocks:

        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,

2654208,4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

Using 64bit option with sparse_super2 creates more than 2 backup superblocks.

mke2fs /dev/sdq1 -t ext4 -b 4096 -O sparse_super2 -O 64bit mke2fs 1.42.12 (29-Aug-2014)
Creating filesystem with 61049344 4k blocks and 15269888 inodes Filesystem UUID: ef3ed24c-0183-40c9-b2de-0b8e9bb868bb Superblock backups stored on blocks:

        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

mke2fs (mkfs.ext4) should respect the sparse_super2 option when used with 64bit or extent.

-- System Information:
Debian Release: 8.3
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.2.8-1-pve (SMP w/24 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages e2fsprogs depends on:

ii  e2fslibs    1.42.12-1.1
ii  libblkid1   2.25.2-6
ii  libc6       2.19-18+deb8u3
ii  libcomerr2  1.42.12-1.1
ii  libss2      1.42.12-1.1
ii  libuuid1    2.25.2-6
ii  util-linux  2.25.2-6

e2fsprogs recommends no packages.

Versions of packages e2fsprogs suggests:

pn  e2fsck-static  <none>
pn  gpart          <none>
ii  parted         3.2-7

-- no debconf information

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#3 lore raw

[Bug 117421] e2fsprogs: mke2fs ignores sparse_super2 when also using extent or 64bit

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=117421

Theodore Tso <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #2 from Theodore Tso <[email protected]> ---
I've added a commit to e2fsprogs 1.43 (when it is released) so it will accept multiple -O options, since other people will likely make the same mistake.

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