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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Hi Luke,

A kernel bug report was opened against Ubuntu [0].  This bug was fixed
by the following commit in v4.7-rc1:


commit 4c63c2454eff996c5e27991221106eb511f7db38

Author: Luke Dashjr <luke@xxxxxxxxxx>
Date:   Thu Oct 29 08:22:21 2015 +0000

    btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in
btrfs_ioctl


However, this commit introduced a new regression.  With this commit
applied, "btrfs fi show" no longer works and the btrfs snapshot
functionality breaks.


I was hoping to get your feedback, since you are the patch author.  Do
you think gathering any additional data will help diagnose this issue,
or would it be best to submit a revert request?


Thanks,

Joe


[0] http://pad.lv/1619918



** Changed in: linux (Ubuntu Yakkety)
       Status: Fix Released => In Progress

** Changed in: linux (Ubuntu Vivid)
       Status: Fix Released => In Progress

** Changed in: linux (Ubuntu Vivid)
     Assignee: Tim Gardner (timg-tpi) => Joseph Salisbury (jsalisbury)

** Also affects: linux (Ubuntu Zesty)
   Importance: High
     Assignee: Joseph Salisbury (jsalisbury)
       Status: In Progress

** Changed in: linux (Ubuntu Yakkety)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1619918

Title:
  lsattr 32bit does not work on 64bit kernel (Inappropriate ioctl error)

Status in linux:
  Unknown
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  I run an amd64 kernel on trusty.  The e2fsprogs package was still the
  32 bit i386 variety.  This lead to the following situation (for
  essentially all files on a btrfs partition).

  $ lsattr /lib/modules/3.13.0-95-generic/kernel/drivers/staging/lustre/lustre/ptlrpc/ptlrpc.ko
  lsattr: Inappropriate ioctl for device While reading flags on /lib/modules/3.13.0-95-generic/kernel/drivers/staging/lustre/lustre/ptlrpc/ptlrpc.ko

  The problem was resolved by installing e2fsprogs:amd64.

  https://patchwork.kernel.org/patch/7517361/ might be related.

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