apport information
** Tags added: apport-collected xenial
** Description changed:
Firstly, apologies if this isn't a bug in cifs.mount - I know it's
intimitly connected to a recent kernel updates which changed the default
SMB version cifs connects with, but I'm having trouble distinguishing
whether this behaviour is caused by the kernel change or a problem with
cifs.
On a recently built 16.04.3 LTS box with kernel 4.4.0-109, I was able to
mount to a network DFS share with the following
mount.cifs -o user=username //pathto/share /mountpoint
and after doing so, I was able to navigate through the mounted share,
and through the underlying DFS structure with no problems. The mount
command notably contained 'vers=1.0' - which was expected.
After updating the kernel to 4.13.0.32, if I run the same command, the
share appears to mount, but I get a 'cannot access ...: Input/Output
error' when trying to move through a DFS mount within the mounted
filesystem.
Notably, the output from the mount command has 'vers=default'.
I understand from various sources, that the default SMB vers is now 3.0
- and if I mount this share explicitly with
mount.cifs -o user=username,vers=3.0 //pathto/share /mountpoint
Then I see 'vers=3' on the output from mount, and am able to use the
share as expected.
The man page for the cifs.mount cmd still says the default is SMB1.0
(this appeared to be the case with a kernel previous to 4.13). The
kernel sources now say the default is SMB 3.0 - which would also be
find, if the share is mounted with vers=3.0.
But instead I'm seeing 'vers=default' - and I'm unsure as to what
version of SMB it's actually trying to use (if any) - whatever it is, it
doesn't work unless I explicitly set vers=3.0.
Thanks
Dave
+ ---
+ AlsaDevices:
+ total 0
+ crw-rw 1 root audio 116, 1 Feb 13 12:02 seq
+ crw-rw 1 root audio 116, 33 Feb 13 12:02 timer
+ AplayDevices: Error: [Errno 2] No such file or directory
+ ApportVersion: 2.20.1-0ubuntu2.15
+ Architecture: amd64
+ ArecordDevices: Error: [Errno 2] No such file or directory
+ AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
+ CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
+ DistroRelease: Ubuntu 16.04
+ HibernationDevice: RESUME=UUID=4d912473-ae08-4591-886b-eff2cb5edfd9
+ InstallationDate: Installed on 2017-07-11 (217 days ago)
+ InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.8)
+ IwConfig: Error: [Errno 2] No such file or directory
+ Lsusb: Error: command ['lsusb'] failed with exit code 1:
+ MachineType: VMware, Inc. VMware Virtual Platform
+ Package: linux (not installed)
+ PciMultimedia:
+
+ ProcFB:
+
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic
root=UUID=d702a195-430c-4bf2-9753-6618837863dc ro
+ ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13
+ RelatedPackageVersions:
+ linux-restricted-modules-4.13.0-32-generic N/A
+ linux-backports-modules-4.13.0-32-generic N/A
+ linux-firmware 1.157.15
+ RfKill: Error: [Errno 2] No such file or directory
+ Tags: xenial
+ Uname: Linux 4.13.0-32-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: oracle
+ _MarkForUpload: True
+ dmi.bios.date: 04/05/2016
+ dmi.bios.vendor: Phoenix Technologies LTD
+ dmi.bios.version: 6.00
+ dmi.board.name: 440BX Desktop Reference Platform
+ dmi.board.vendor: Intel Corporation
+ dmi.board.version: None
+ dmi.chassis.asset.tag: No Asset Tag
+ dmi.chassis.type: 1
+ dmi.chassis.vendor: No Enclosure
+ dmi.chassis.version: N/A
+ dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd04/05/2016:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
+ dmi.product.name: VMware Virtual Platform
+ dmi.product.version: None
+ dmi.sys.vendor: VMware, Inc.
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1749214/+attachment/5054389/+files/CurrentDmesg.txt
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https://bugs.launchpad.net/bugs/1749214
Title:
default vers value when mounting cifs shares with mount.cifs not
working
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