[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2021-08-03 Thread Norbert
** Tags removed: precise trusty

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-07-03 Thread Marc Peña
I've been using e2fsprogs-xenial from Simon PPA for a month without
issues so far.

I'm using the an external drive for journal an this options in my fstab
for the volume:

errors=remount-
ro,data=journal,journal_async_commit,nobarrier,commit=60,noatime 0

Thanks for this!

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-05-27 Thread Theodore Ts'o
The blog post here:
https://raid6.com.au/posts/fs_ext4_external_journal_caveats/

is not generally true.   What journal_async_commit does is convert the
sequence:

1.  write journal blocks
2.  cache flush
3.  write journal commit block
4.  cache flush

... to:

1.  write journal blocks
2.  write journal commit block
3.  cache flush

This tends to make a lot of difference on HDD's from a performance
perspective, because a cache flush commands are so expensive.   On an
SSD with a competently implemented flash translation layer (FTL), it
shouldn't make much of a difference from a performance perspective, and
it shouldn't hardly any difference from write endurance perspective.

The way flash works is that flash chips are organized into erase blocks,
which might be say, 64k.   This is the minimal size must be erased as a
unit.  Once an erase block is cleared (which is the slow operation) it
can be written a flash page (typically 4k in size) at a time.  Once a
flash page is written, it can't be erased except by erasing the entire
erase block.   If most of the erase blocks are filled, either with real
data, or with garbage (former data contents which have been superceded),
then it might be necessary to copy the still-used data contents to other
erase blocks, so that an erase block can be emptied so it can be erased.
If it is necessary to do those extra copies before the erase block can
be rebase, this is cause of the "write amplifification" effect.

However, doing an extra CACHE FLUSH operation (which is what
journal_async_commit eliminates) should not make any difference on any
competently implemented FTL on a normal SSD.

The place where it make a difference is on what gets referred to as
"cost optimized" flash in polite company, or "crap flash" by more honest
engineers.  You will most often find this in eMMC flash or SD cards
found in the cash register aisle of Micro Center (assuming of course,
that you actually get honestly labelled flash as opposed to a SD card
claiming to have 1G of flash, but which is only backed by 16 MB of flash
--- such that the 16MB + 4k write will end up overwriting previously
written data).In these "cost optimized" flash, the FTL may end up
mapping each 64k erase page to a 64k LBA address space.  In that case, a
4k write followed by a cache flush will end up being the equivalent of a
64k flash erase/write.  In the even more awful "crappy flash", each 64k
erase block is direct mapped to a 64k LBA address space.  In that case,
if you are constantly overwriting any portion of the flash (either the
FAT table for FAT file systems, or the journal in ext4), then those
erase blocks will get worn out first --- and once they are worn out, the
flash device becomes broken.

But I emphasize that this is really only a problem for crap flash.  For
a normal SSD with a competent FTL, the use of journal_async_commit (or
not using journal_async_commit) should not make any real difference to
how long your flash device lasts.

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https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-05-27 Thread Simon Iremonger
Here is the PPA for all architectures, please test :-
https://launchpad.net/~ubuntu-iremonger/+archive/ubuntu/e2fsprogs-xenial

That is currently a backport of the version in bionic release itself,
but maintains the xenial mke2fs.conf defaults [creating filesystems
without 64bit,metadata_csum] for compatibility.

I notice e2fsprogs in cosmic [1.44.2] introduces an anti-crash-fix [filesystems 
designed to crash e2fsck!].  Exactly what versions should then be considered 
for xenial-backports and xenial-updates, and if any updates to bionic should 
also be considered, is another matter!.
Debian already have 1.44.2 backported to stretch (their current LTS release), 
for example.

"-updates" versions might not, for example, want to update the comerr
development headers and other potential compatibility regression areas,
who knows?.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-05-27 Thread Marc Peña
That's great Simon! I will test it once it's ready then.

Regarding (b): wouldn't it be easier to try to get the package in 
xenial-backports then?
That repo it's activated by default, but as I can read here: 
https://help.ubuntu.com/community/UbuntuBackports

On releases before (but not including) Ubuntu 11.04 (Natty Narwhal), apt
defaulted to always installing packages from Backports. On later
releases, apt only installs packages from Backports when they are
explicitly requested.

So the risk would be much lower.

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https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-05-27 Thread Simon Iremonger
Marc,  Briefly just to let you know I'm working on a PPA for bionic e2fsprogs 
backport to xenial, will update when thats' ready.  Turns out that:-
(a) Ubuntu devs are rather tied-up fixing bionic18.04 bugs, and
(b) to do a good SRU would need much regression-testing and somebody to push it 
forwards.

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https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-05-26 Thread Marc Peña
I would like to test this configuration in my laptop with a slow
rotational disk + a small SSD:
https://raid6.com.au/posts/fs_ext4_external_journal_caveats/

But, if I understood correctly, I need to configure journal_async_commit
for it to be reliable, and that option automatically enables
journal_checksum, that it's not available in the current e2fsprogs
version that ubuntu 16.04 has...am I missing something?

I also think that what Simon comments about the SRU is quite sensible,
but if getting a SRU is too hard, would it make sense to open a ticket
requesting a backport from bionic to xenial?

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-17 Thread Theodore Ts'o
If you are trying to build from the unpacked debian sources for 1.43.x,
you'll need to run the commands:

./debian/rules mrproper
./debian/rules

... to have the build system figure out which antique version of Debian
build infrastructure you are using, and regenerate debian/control from
debian/control.in.   (Usually I just check

That may be what you are running into.   Note that starting in 1.44.0,
I've dropped all of the backwards compatibility stuff, on the theory
that people who want to support ancient Linux distribution systems are
paid the big bucks, and it wasn't worth my volunteer time to make it all
work and do all of the testing on ancient systems.  (And especially
since most enterpise distro folks weren't taking the latest bug fixes
anyway, and it's been over ten years since I've had to care about
enterprise distro customers.)

The short version is that the backwards compatibility stuff was all
about making things like the debug packages work.  It's all packaging
gunk, and so as long as you crate packages that pass lintian checks,
it's probably fine.

As a reminder, the distro packaging of the latest version of e2fsprogs
for old back-level enterpise distros may cause the distro release folks
to want to constain the default ext4 file system features that are
enabled, since the older versions of grub, the linux kernel, et. al,
might not support metadata checksuming (for example).   So I could
easily see that Ubuntu might want to adjust misc/mke2fs.conf.in file to
disable certain file system features from being enabled in freshly
created file systems by default, for example.   I also have a vague
memory that Ubuntu had a slightly different convention for supporting
debug symbol packages on older Ubuntu systems.  If so, that may require
more adjustments --- or maybe you'll just decide to disable the debug
symbol packages and call it a day.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-17 Thread Simon Iremonger
HOWEVER, Trusty e2fsprogs backporting situation actually seems to be that, some 
change between  1.43.3-1~bpo8+1  and  1.43.4-2  is where the 
trusty-incompatibility has accrued, 1.43.9-2 does NOT build on trusty! :-
https://www.iremonger.me.uk/noidx/e2fs/e2fsprogs-1.43.9_trusty_build-fail.log

A simple patch to the 'debian/control' file adding the explicit '-dbg' package 
entries on the end *APPEARS* to solve all the problems, and allows 1.43.9 [or 
1.44.0 for that matter!] to SEEMINGLY build fine, pass all tests, and work fine 
on trusty without any issues I can find so-far!:-
https://www.iremonger.me.uk/noidx/e2fs/e2fsprogs-1.43.9_trusty_debian-control.patch
https://www.iremonger.me.uk/noidx/e2fs/e2fsprogs-1.44.0_trusty_debian-control.patch

This all SEEMS to work fine, but I'd like tytso to comment on this, is
this really a safe workaround or just 'fixing the symptom'.  From what I
can see all the right programs are generated and work fine.

AGAIN, I'd highly recommend installing byte-for-byte the 'original' mke2fs.conf 
in any trusty-backport version of e2fsprogs, so as to avoid any unwanted 
behavioural-changes or configuration-file-update-prompts :-.
https://www.iremonger.me.uk/noidx/e2fs/mke2fs.conf.trusty

>From what I can SEE, if doing a significant backport to trusty, I can't
see why not to just go straight to 1.44.0 in this case [again, hopefully
tytso can comment!].

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-17 Thread Simon Iremonger
OK On further investigation, I have confirmed a lot of key-facts (1 of 2
linked comments).

e2fsprogs 1.44.0-1 backports to xenial with no difficulty whatsoever,
passes "make fullcheck" and works in every way I can tell, lots of
resizing and checking and use within gparted, etc, all (apparently)
behaving...

HOWEVER, for an official xenial-backport (and especially xenial-SRU), to 
minimize possible problems, I would highly recommend making single change of 
restoring the 'default' mke2fs.conf EXACTLY (byte-for-byte) as that which came 
with xenial e2fsprogs 1.42.13-1ubuntu1 :-
https://www.iremonger.me.uk/noidx/e2fs/mke2fs.conf.xenial
This (a) avoids prompting users who've customized their mke2fs.conf about 
merging-changes, and (b) avoids functional-change for those with 
automated-deployment-scripts etc. based upon ext4 creation.

I presume, a 'xenial-backport' -or- SRU "proposed" update can be started
straight-away?  xenial-SRU should DEFINITELY be considered for fsck
compatibility with bionic-created FS.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-17 Thread Simon Iremonger
e2fsprogs 1.44.0 for bionic18.04 has apparently been agreed:-
https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1756177

[launchpad build-logs suggest its' been built for PROPOSED but not yet
seen it 'come through' as a package or appear on 'packages.ubuntu.com'
...].

Hopefully that will go through.  Is the first-step thereafter, to then
"xenial-backports" 1.44.0 and "trusty-backports" 1.43.9 ?  -- I believe
devs spoke of accepting an SRU (full stable-release-update) for xenial
e2fsprogs, but I suspect backporting in first instance may be a good
approach [?].

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-15 Thread Simon Iremonger
See linked bug 1601997, response seems to be to accept your 'new'
defaults for ext4 in 18.04. I note, particularly -- your request about
1.44.0 inclusion doesn't yet seem to be addressed [maybe it requires a
separate bug//issue] ;-(.  Do expand on that point if you can.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-15 Thread Theodore Ts'o
The Metadata_csum feature is a RO_COMPAT feature.   Hence, grub2 and os-
prober shouldn't care about this feature (if properly implemented).
This is because the guarntee is that even if the kernel (or userspace
application directly accessing the file system) doesn't know about a bit
in the RO_COMPAT bitmask, it is safe to access the file system in read-
only mode.

Now, the 64-bit feature is an INCOMPAT feature.   This means that if the
kernel (or user-space program directly accessing the file sytem) doesn't
understand a bit in the INCOMPAT feature set, it is *not* safe for it to
try to understand the file system.This feature was only enabled in
e2fsprogs 1.43.x if the file system was larger than 16TB.   JHowever, by
e2fsprogs 1.44.0, it is turned on by default even for file systems
smaller than 16TB.  That's because it was expected that by now, we had
given grub2 and os-prober enough time to get with the program --- and if
you create a file system without the 64-bit feature, it is not possible
to online resize it beyond 16TB.   So this is why we turn on the 64-bit
feature out of the box with e2fsprogs 1.44.0 (there are failure modes
with leaving it turned off for the sake of backwards compatibility with
antique software versions).However, if a enterprise distribution
decides that backwards compatibility is more important new features, it
can ship e2fsprogs with an edited version of misc/mke2fs.conf.in.
Feel free to turn off 64-bit if you think breaking the 15TB->16TB online
resize is an acceptable consequence about the 16.04 vs 18.04 multi-
booting issue.   That's why the customers pay the enterprise distro
providers the big bucks.   :-)

Or get really frustrated with the enterprise distro providers.
Probably both.  :-)

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-14 Thread Simon Iremonger
FWIW, As was discussed, I checked into Grub2 and os-prober in older supported 
ubuntu (which may have similar incompatibility to e2fsprogs, thereby creating a 
multibooting issue with 18.04).
After experimenting carefully with a 14.04+16.04+18.04 (GA kernels, no HWE 
specifically) BIOS-style triple boot, can confirm the grub ext4 support is all 
cross-compatible (14.04 can autodetect and boot 64bit,metadata_csum 18.04 from 
its' own grub2).

However, e2fsprogs is DEFINITELY an issue as above, definitely worth
sorting-out whatever-happens to the 18.04 default filesystem options, in
my view.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-10 Thread Simon Iremonger
Given your other comment (which I think may have been posted to the wrong 
thread):-
[E2fsprogs 1.44.0 now depends on dpkg build-profiles, which means that getting 
it backported to 14.04 LTS would require adjusting debian/control and 
debian/rules a bit. For 14.04 LTS, I'd urge consideration of going to e2fsprogs 
1.43.9. This will get you most of the latest bug fixes, including some that 
could cause massive file system corruption and data loss (relative to e2fsprogs 
1.42.x) in the right (wrong) circumstances.]

--are you saying that 1.39.9/1.44.0 ought to not only go to trusty-backports 
and xenial-backports, but also then into 'updates' to be 'pushed to all users' 
-- that needs some fiddly SRU process ?
I note Debian haven't pushed such an update back to jessie/wheezy either.

I (suspect) Canonical will require significant 'evidence'/'bug-reports'
for backports to become 'updates' in this circumstance...  HOPEFULLY
1.44.0 into bionic will be easier.

Hope that helps,

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-10 Thread Theodore Ts'o
I recently released e2fsprogs 1.44.0 (currently in Debian Unstable,
should hopefully hit Debian Testing in three more days) which turns on
Metadata Checksums for everyone.

https://packages.debian.org/sid/e2fsprogs

Pulling in 1.44.0 supports two new features, largedir and ea_inode,
(neither turned on by default yet, but the second in particular is very
useful for Samba servers since it was written specifically to
efficiently support Windows ACL's and Security ID's better than any
other file system by supporting xattr dedupe.)

http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.44.0

In general e2fsprogs has a very conservative release process, and there
have been a *large* number of bug fixes since e2fsprogs 1.42.13.
(Including some that can cause horrible file system corruption and data
loss if you do off-line resize2fs operations (resizing the file system
while the file system is not mounted) under some circumstances.   So if
you are using distribution with that has e2fsprogs 1.42.13, on the
misguided assumption that staying on an ancient version of e2fsprogs is
"safer" --- that is simply not true.

One caveat: in 1.44.0 I started relying on dpkg build profiles in
debian/rules.   This means e2fsprogs 1.44.0 no longer builds out of the
box for Debian 7 (wheezy, aka Debian old-old-stable) and Ubuntu Trusty
(14.04 LTS) and older releases.  It should be possible to backport
e2fsprogs 1.44.0 to 14.04 LTS, but at the very least 14.04 LTS should go
to 1.43.9 to fix a huge number of bugs.   But for 16.04, e2fsprogs
1.44.0 should just drop right in.  And with 14.04 LTS and older,
e2fsprogs 1.43.9 should Just Work.

It wouldn't be that hard to make e2fsprogs 1.44.0 work on 14.04 LTS, but
it won't be turn-key.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-10 Thread Simon Iremonger
Ubuntu 18.04 may well enable (under review) 64bit,metadata_csum by
default, thereby creating ext4 filesystems that are not compatible with
e2fsck on Ubuntu-16.04 LTS (or 14.04)?

This creates all sorts of problems for compatibility/portability of 
filesystems, for e.g.:-
* dual-booting 18.04 and older LTS versions
* "ext4 portable disks" do not work.
* (notice also Ken's hwe-edge/lvm issue above too).

I strongly support that Xenial gets a backport of e2fsprogs-1.43 (as requested) 
so that this compatibility-annoyance is ameliorated, at least.
Debian have already done this, created a "jessie-backports" 
e2fsprogs=1.43.3-1~bpo8+1 

Hopefully tytso can advise us on the best version of e2fsprogs to
backport (18.04 currently has 1.43.9-2).

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2018-03-10 Thread TJ
I'm re-assigning the status and importance based on user reports in IRC
and elsewhere.

See also the related "Ubuntu 16.10 installer sets metadata_csum option
on ext4 partition which is incompatible with other LTS Ubuntu versions"

https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1601997

** Changed in: e2fsprogs (Ubuntu)
   Status: In Progress => Triaged

** Changed in: e2fsprogs (Ubuntu)
   Importance: Wishlist => Medium

** Changed in: e2fsprogs (Ubuntu)
 Assignee: Daniel Mehrmann (daniel-mehrmann) => (unassigned)

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  Triaged

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2017-12-17 Thread Ken Sharp
Aaaand... installing the hwe-edge packages on Xenial causes LVM EXT4
partitions to fail entirely because e2fsck cannot handle it.

A bit more of an issue than "wishlist".

Workaround: install Zesty e2fsck and e2libs and pray that they work.

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2017-09-29 Thread Norbert
Unable to check 17.10 ext4 file-system from 16.04 LTS (!).

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2017-04-20 Thread Norbert
Unable to check 16.10 ext4 file-system from 16.04 LTS (!).
Here is log:

   sudo fsck -fy /dev/sdc1 
   fsck from util-linux 2.27.1
   e2fsck 1.42.13 (17-May-2015)
   /dev/sdc1 has unsupported feature(s): metadata_csum
   e2fsck: Get a newer version of e2fsck!

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2017-02-08 Thread rich painter
I would REALLY like metadata_csum to be backported for 16.04 LTS

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Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2016-10-03 Thread Richard Laager
This is fixed in 16.10. Is there a plan to backport this? I'm guessing
not, because of the risk of regressions. If there's no plans to SRU,
then this bug should probably be closed.

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https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2016-07-14 Thread Alberto Salvia Novella
** Changed in: e2fsprogs (Ubuntu)
   Importance: Undecided => Wishlist

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to e2fsprogs in Ubuntu.
https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1365874/+subscriptions

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[Touch-packages] [Bug 1365874] Re: Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata checksumming

2016-07-11 Thread Norbert
I reported bug 1601997 about setting 'metadata_csum' option on ext4
while installing fresh Ubuntu 16.10.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to e2fsprogs in Ubuntu.
https://bugs.launchpad.net/bugs/1365874

Title:
  Ubuntu 12.04 LTS, 14.04 LTS, 16.04 LTS do not support ext4 metadata
  checksumming

Status in e2fsprogs package in Ubuntu:
  In Progress

Bug description:
  In the Trusty release notes "Metadata checksumming" is listed as one
  of the tech highlights of kernel 3.13.

  https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#New_features_in_14.04_LTS

  However, the userland tools do not support this kernel feature. To the
  best of my knowledge this will be supported in 1.43, and won't be
  backported to 1.42.

  IMHO this is very misleading. It's like a car salesperson sold you a
  sports car with an V8 engine. After you drove it home, you opened the
  hood and realized only 6 cylinders are working because 2 of the spark
  plugs were not included, and you have to buy aftermarket ones.

  BTW, I've been following the development of e2fsprogs for over a
  year. 1.43  release has been in limbo for God knows how long :(
  

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1365874/+subscriptions

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