Does the samba task need fixing in disco at all?
** Changed in: samba (Ubuntu)
Status: In Progress => Incomplete
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https://bugs.launchpad.net/bugs/1778322
Title:
gvfs-smb-browse can't browse samba/smb tree
Status in gvfs package in Ubuntu:
Triaged
Status in nautilus package in Ubuntu:
Invalid
Status in samba package in Ubuntu:
Incomplete
Status in gvfs source package in Bionic:
Triaged
Status in gvfs source package in Cosmic:
Triaged
Bug description:
[Impact]
The so called "browsing a windows network" made use of an SMB1 protocol
version feature. Recent versions of samba, including the one released with
bionic, default to a higher versions of the protocol which lacks this feature.
As a result, the "other locations -> windows network" tab in Nautilus is empty
even when there are windows or samba machines in the network.
Accessing such machines directly, via smb://<name-or-ip>/ type urls,
continues to work.
The fix is two-fold:
- introduce a new samba API call that can be used to set the protocol version
to use
- change applications to make use of this API call to set the protocol versio
to SMB1/NT1 just for the network browsing
gvfs was updated to make use of this api call, if detected at build
time. To complete this SRU, gvfs needs a no-change rebuild *after*
samba was accepted into proposed.
[Test case]
* Launch a bionic desktop vm. You can start with a server one, and then
install the "ubuntu-desktop" package. In the same command, also install the
packages we need for this test:
$ sudo apt update
$ sudo apt install ubuntu-desktop samba smbclient
* set a password for the ubuntu user, so you can login at the graphical
console
$ sudo passwd ubuntu
* reboot
$ sudo reboot
* login at the graphical console as the ubuntu user. Go through the
first-user-setup motions as you want.
* try to browse the windows network via "other locations -> windows
network". You will get an empty folder.
* update the samba and gvfs packages
* logout and login again on the gui, browse the windows network again. This
time it will show the "WORKGROUP" folder, and if you click through, you will
see yourself (your VM).
[Regression potential]
The samba update itself just introduces and exposes a new API call. It's up
to other applications to make use of that. gvfs was patched to detect this call
at build time and use it if it's detected.
Packages that are not rebuilt will not see the change, and packages that
*are* rebuilt will only see the change if they make use of it.
[Other Info]
This update introduces a specific runtime dependency between gvfs and
libsmbclient due to the new API call added to the latter. Any package that is
rebuilt with libsmbclient and makes use of that API call will get this specific
dependency. This is handled automatically by dh_mkshlibs.
To complete this SRU, gvfs will need a no-change rebuild after samba
was accepted into proposed.
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Nautilus should show smbtree and host on the smb network.
When inputing this command:
killall gvfsd-smb-browse && GVFS_DEBUG=1 /usr/lib/gvfs/gvfsd-smb-browse
You can see the error:
smb-network: Queued new job 0x55b19a2c9f40 (GVfsJobCreateMonitor)
smb-network: send_reply(0x55b19a2c9f40), failed=1 (Action not supported by
the processing engine)
smb-network: backend_dbus_handler org.gtk.vfs.Mount:QueryFilesystemInfo
(pid=5708)
smb-network: Queued new job 0x55b19a2e7820 (GVfsJobQueryFsInfo)
smb-network: send_reply(0x55b19a2e7820), failed=0 ()
smb-network: backend_dbus_handler org.gtk.vfs.Mount:Enumerate (pid=5708)
smb-network: Queued new job 0x55b19a2c30c0 (GVfsJobEnumerate)
smb-network: send_reply(0x55b19a2c30c0), failed=0 ()
Proposed solution:
Add gvfsbackendbrowse-switch-to-NT1.patch disscused on RedHat Bugzilla
[link]https://bugzilla.redhat.com/show_bug.cgi?id=1513394
which implements "change to NT1" in gvfs-smb-browse to browse smbtree to
aviod adding "max client protocol" = NT1" to smb.conf to switch all samba to
unsafe NT1 which most users are doing to correct this bug.
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