[Bug 1576594] Re: File change notify does not occur on file rename

[Marcel Bischoff]

I can confirm this exact behavior. When connecting via CIFS, a proper
notification is sent. When connecting via SMB2 or SMB3 protocol, the
notification is not sent. This affects for example creating folders,
where the default naming is something like "Untitled Folder" and is then
changed to the name it should be. The name never changes from "Untitled
Folder" on a another Mac OS X client until the share is unmounted and
mounted again.

Testing this on a Linux client, the notification is also not sent but a
refresh of the folder contents shows the updated information. This is
where Mac OS X apparently falls short as there is no way to successfully
refresh the SMB Finder window. The usual AppleScript approach via `tell
application "Finder" to tell front window to update every item` simply
hides the renamed item until you browser away from the folder and back
again. The latter is clearly a Mac OS X issue, while the former a
problem of Samba.

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https://bugs.launchpad.net/bugs/1576594

Title:
  File change notify does not occur on file rename

Status in samba package in Ubuntu:
  Confirmed

Bug description:
  What happened:

  MacOS 10.11.4 connecting to Samba 4.3.8 on Ubuntu Server 16.04

  Upon rename of file by another process on the system, Samba does not
  notify connected clients of update (directory listing does not
  refresh). New file/directory creation works just fine, as does moving
  a file to another directory.

  For example, if I have a samba share called "CatPics" pointing at
  /mnt/CatPics, I can ssh into the machine, "cd /mnt/CatPics" and enter
  "touch LongCat.jpg", creating the file. This will cause a notify of
  the update to connected clients which will then display that file. If
  I then enter "mv LongCat.jpg CeilingCat.jpg", connected OSX clients
  are not notified of the rename (and attempting to open the file
  through samba will fail, as it no longer exists). "LongCat.jpg"
  continues to appear in the directory listing. If you move LongCat.jpg
  to another directory through SSH, the display refreshes but continues
  to display the old filename in the new location.

  Filesystem in this case is BTRFS, but have confirmed the issue also
  occurs on EXT4, so not an issue there.

  I have tested this same process on Windows 10 clients and it works
  fine.

  That said, I've tested with the OSX client against older versions of
  Samba (3.6.25 in this case) and that also works fine, so it seems to
  be an interaction between the two.

  Note that this is also more of a problem than you might think, as in
  Apple's infinite wisdom, OSX doesn't have a refresh button, so you
  can't manually update the directory listing...

  What should have happened:

  In the example above, OSX client should have refreshed directory
  listing and displayed "CeilingCat.jpg".

  Ubuntu version:

  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  Samba package version:

  samba:
    Installed: 2:4.3.8+dfsg-0ubuntu1
    Candidate: 2:4.3.8+dfsg-0ubuntu1
    Version table:
   *** 2:4.3.8+dfsg-0ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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