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[Launchpad Bug Tracker <1594871@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package zfs-linux - 0.6.5.6-0ubuntu10

---------------
zfs-linux (0.6.5.6-0ubuntu10) xenial; urgency=medium

  * Sync with relevant upstream fixes (LP: #1594871)
   - Fix user namespaces uid/gid mapping
     As described in torvalds/linux@5f3a4a2 the &init_user_ns, and
     not the current user_ns, should be passed to posix_acl_from_xattr()
     and posix_acl_to_xattr().  Conveniently the init_user_ns is
     available through the init credential (kcred).
     (upstream commit 874bd959f4f15b3d4b007160ee7ad3f4111dd341)
     ZFS #4177
   - Fix ZPL miswrite of default POSIX ACL
     Commit 4967a3e introduced a typo that caused the ZPL to store the
     intended default ACL as an access ACL. Due to caching this problem
     may not become visible until the filesystem is remounted or the inode
     is evicted from the cache. Fix the typo.
     (upstream commit 98f03691a4c08f38ca4538c468e9523f8e6b24be)
     ZFS #4520
   - Create unique partition labels
     When partitioning a device a name may be specified for each partition.
     Internally zfs doesn't use this partition name for anything so it
     has always just been set to "zfs".
     However this isn't optimal because udev will create symlinks using
     this name in /dev/disk/by-partlabel/.  If the name isn't unique
     then all the links cannot be created.
     Therefore a random 64-bit value has been added to the partition
     label, i.e "zfs-1234567890abcdef".  Additional information could
     be encoded here but since partitions may be reused that might
     result in confusion and it was decided against.
     (upstream commit fbffa53a5cdb9b796de5afc9be8c1f79619253d4)
     ZFS #4517
   - Fix inverted logic on none elevator comparison
     Commit d1d7e2689db9e03f1 ("cstyle: Resolve C style issues") inverted
     the logic on the none elevator comparison.  Fix this and make it
     cstyle warning clean.
     (upstream commit 60a4ea3f948f1596b92b666fc7dd21202544edbb)
     ZFS #4507
   - Remove wrong ASSERT in annotate_ecksum
     When using large blocks like 1M, there will be more than UINT16_MAX
     qwords in one block, so this ASSERT would go off. Also, it is possible
     for the histogram to overflow. We cap them to UINT16_MAX to prevent this.
     (upstream commit 21ea9460fa880bb072a9ca9d845aef740f9d3af6)
     ZFS #4257
   - Fix 'zpool import' blkid device names
     When importing a pool using the blkid cache only the device
     node path was added to the list of known paths for a device.
     This results in 'zpool import' always using the sdX names
     in preference to the 'path' name stored in the label.
     To fix the issue the blkid import path has been updated to
     add both the 'path', 'devid', and 'devname' names from the
     label to the known paths.  A sanity check is done to ensure
     these paths do refer to the same device identified by blkid.
     (upstream commit c9ca152fd1de1b0fd959e772b9a25d14a891952b)
     ZFS #4523, #3043
   - Use udev for partition detection
     When ZFS partitions a block device it must wait for udev to create
     both a device node and all the device symlinks.  This process takes
     a variable length of time and depends on factors such how many links
     must be created, the complexity of the rules, etc.  Complicating
     the situation further it is not uncommon for udev to create and
     then remove a link multiple times while processing the udev rules.
     In order to address this the zpool_label_disk_wait() function
     has been updated to use libudev.  Until the registered system
     device acknowledges that it in fully initialized the function
     will wait.  Once fully initialized all device links are checked
     and allowed to settle for 50ms.  This makes it far more likely
     that all the device nodes will exist when the kernel modules
     need to open them.
     For systems without libudev an alternate zpool_label_disk_wait()
     was updated to include a settle time.  In addition, the kernel
     modules were updated to include retry logic for this ENOENT case.
     Due to the improved checks in the utilities it is unlikely this
     logic will be invoked.  However, if the rare event it is needed
     it will prevent a failure.
     (upstream commit 2cb77346cb698ae0c233c7baf8b4c787205b54e9)
     ZFS #4523, #3708, #4077, #4144, #4214, #4517
   * Fix ztest truncated cache file (LP: #1587686)
     Commit efc412b updated spa_config_write() for Linux 4.2 kernels to
     truncate and overwrite rather than rename the cache file.  This is
     the correct fix but it should have only been applied for the kernel
     build.  In user space rename(2) is needed because ztest depends on
     the cache file.
     (upstream commit 151f84e2c32f690b92c424d8c55d2dfccaa76e51)
     ZFS #4129

 -- Colin Ian King <colin.king@xxxxxxxxxxxxx>  Tue, 21 Jun 2016 15:49:12
+0100

** Changed in: zfs-linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1594871

Title:
  Sync up latest relevant upstream bug fixes

Status in linux package in Ubuntu:
  Fix Released
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in zfs-linux source package in Yakkety:
  Fix Released

Bug description:
  [SRU JUSTIFICATION][XENIAL]

  There are several upstream zfs bug fixes that would be beneficial to
  sync into zfs utils as a SRU, namely:

  Fix user namespaces uid/gid mapping
     commit 874bd959f4f15b3d4b007160ee7ad3f4111dd341
     ZFS #4177

  Fix ZPL miswrite of default POSIX ACL
     commit 98f03691a4c08f38ca4538c468e9523f8e6b24be
     ZFS #4520

  Create unique partition labels
     commit fbffa53a5cdb9b796de5afc9be8c1f79619253d4
     ZFS #4517

  Fix inverted logic on none elevator comparison
     commit 60a4ea3f948f1596b92b666fc7dd21202544edbb
     ZFS #4507

  Remove wrong ASSERT in annotate_ecksum
     commit 21ea9460fa880bb072a9ca9d845aef740f9d3af6
     ZFS #4257

  Fix 'zpool import' blkid device names
     commit c9ca152fd1de1b0fd959e772b9a25d14a891952b
     ZFS #4523, #3043

  Use udev for partition detection
     commit 2cb77346cb698ae0c233c7baf8b4c787205b54e9
     ZFS #4523, #3708, #4077, #4144, #4214, #4517

  [TEST CASE / REGRESSION POTENTIAL]

  These fixes will be tested against the kernel team ZFS tests to check
  for regressions.

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