[Samba] Is it possible to 'getfacl' on a mounted samba share ?

Nicola Mingotti nmingotti at gmail.com
Mon Jan 25 10:38:57 UTC 2021


Answering to Rowland and Louis,

. I downgraded the Linux version to:
p at linte> uname -a
Linux linte 4.19.0-12-amd64 #1 SMP Debian 4.19.152-1 (2020-10-18) x86_64 
GNU/Linux

=> That did not affect the outcome of 'getfacl' nor 'ls -l'


. I run the proposed script, I made only a small change, "Administrator" 
with my default
admin name in the code.

========================================================================================
========================== samba-collect-debug-info.sh 
=================================
========================================================================================

Collected config  --- 2021-01-25-11:27 -----------

Hostname: linte
DNS Domain: borghi.lan
FQDN: linte.borghi.lan
ipaddress: 172.16.3.37

-----------

Kerberos SRV _kerberos._tcp.borghi.lan record verified ok, sample output:
Server:         172.16.3.51
Address:        172.16.3.51#53

Non-authoritative answer:
*** Can't find _kerberos._tcp.borghi.lan: No answer

Authoritative answers can be found from:
borghi.lan
         origin = borghi.lan.borghi.lan
         mail addr = root.borghi.lan.borghi.lan
         serial = 2020121500
         refresh = 3600
         retry = 900
         expire = 604800
         minimum = 86400
Samba is running as a Unix domain member

-----------
        Checking file: /etc/os-release

PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

-----------



This computer is running Debian 10.7 x86_64

-----------
running command : ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
group default qlen 1000
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
     inet 127.0.0.1/8 scope host lo
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast 
state UP group default qlen 1000
     link/ether 52:54:00:da:ea:ce brd ff:ff:ff:ff:ff:ff
     inet 172.16.3.37/24 brd 172.16.3.255 scope global enp1s0

-----------
        Checking file: /etc/hosts

127.0.0.1       localhost
127.0.1.1       linte.borghi.lan        linte

# The following lines are desirable for IPv6 capable hosts
# ::1     localhost ip6-localhost ip6-loopback
# ff02::1 ip6-allnodes
# ff02::2 ip6-allrouters

-----------

        Checking file: /etc/resolv.conf

domain windom.borghi.lan
search windom.borghi.lan
nameserver 172.16.3.51
# nameserver 172.16.3.49
# nameserver 172.16.3.54

-----------

        Checking file: /etc/krb5.conf

[libdefaults]
   default_realm = WINDOM.BORGHI.LAN
   dns_lookup_realm = false
   dns_lookup_kdc = true

-----------


        Checking file: /etc/nsswitch.conf

# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         files winbind systemd
group:          files winbind systemd
shadow:         files winbind
gshadow:        files

hosts:          files mdns4_minimal [NOTFOUND=return] dns myhostname
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

-----------

        Checking file: /etc/samba/smb.conf

[global]
    workgroup = WINDOM
    security = ADS
    realm = WINDOM.BORGHI.LAN

    winbind refresh tickets = Yes
    vfs objects = acl_xattr
    map acl inherit = Yes
    store dos attributes = Yes

    dedicated keytab file = /etc/krb5.keytab
    kerberos method = secrets and keytab

    # ho un solo dominio, quindi mi conviene non dover digitare sempre
    # user invece di "WINDOM\user"
    # winbind use default domain = yes

    # rimuovere dopo il testing
    winbind enum users = yes
    winbind enum groups = yes

   # disable printing
    load printers = no
    printing = bsd
    printcap name = /dev/null
    disable spoolss = yes

    # logs
    log file = /var/log/samba/%m.log
    log level = 1

    # ---- ID mapping backend rid -------
    # Default ID mapping configuration for local BUILTIN accounts
    # and groups on a domain member. The default (*) domain:
    # - must not overlap with any domain ID mapping configuration!
    # - must use a read-write-enabled back end, such as tdb.
    idmap config * : backend = tdb
    idmap config * : range = 3000-7999
    # - You must set a DOMAIN backend configuration
    # idmap config for the SAMDOM domain
    idmap config SAMDOM : backend = rid
    idmap config SAMDOM : range = 10000-999999

    # Template settings for login shell and home directory
    template shell = /bin/bash
    template homedir = /home/WINDOM-%U

    # mappare "Administrator" a "root"
    username map = /usr/local/samba/etc/user.map

# directory che funge da disco in condivisione
# ok- this is working !
# [sambaDisk]
#       path = /home/WINDOM-nicola/testSamba
#       read only = no
#       vfs objects = shadow_copy2
#       shadow:snapdir = /home/WINDOM-nicola/snapshots
#       shadow:basedir = /home/WINDOM-nicola/testSamba
#       shadow:sort = desc


# [sambaDisk]
#       path = /home/WINDOM-nicola/testSamba
#       read only = no
#       vfs objects = shadow_copy2
#       shadow:mountpoint = /home/WINDOM-nicola/testSamba
#       # richiesto relative se si usa 'snapdirseverywhere'
#       shadow:snapdir = snapshots
#       # shadow:snapdir = /home/WINDOM-nicola/testSamba/snapshots

#       # shadow:basedir = toSnap
#       shadow:sort = desc
#       # shadow:localtime = yes
#       # shadow:format = '%Y.%m.%d-%H.%M.%S'
#       shadow:snapdirseverywhere = yes


-----------

Running as Unix domain member and user.map detected.

Contents of /usr/local/samba/etc/user.map

!root = WINDOM\adam1

Server Role is set to :  auto

-----------

Installed packages:
ii  acl 2.2.53-4                                     amd64        access 
control list - utilities
ii  attr 1:2.4.48-4                                   amd64 utilities 
for manipulating filesystem extended attributes
ii  fonts-quicksand 0.2016-2                                     all 
sans-serif font with round attributes
ii  krb5-config 2.6                                          all 
Configuration files for Kerberos Version 5
ii  krb5-locales 1.17-3+deb10u1                               all 
internationalization support for MIT Kerberos
ii  krb5-user 1.17-3+deb10u1                               amd64        
basic programs to authenticate using MIT Kerberos
ii  libacl1:amd64 2.2.53-4                                     
amd64        access control list - shared library
ii  libattr1:amd64 1:2.4.48-4                                   
amd64        extended attribute handling - shared library
ii  libgssapi-krb5-2:amd64 1.17-3+deb10u1                               
amd64        MIT Kerberos runtime libraries - krb5 GSS-API Mechanism
ii  libkrb5-26-heimdal:amd64 
7.5.0+dfsg-3                                 amd64        Heimdal 
Kerberos - libraries
ii  libkrb5-3:amd64 1.17-3+deb10u1                               
amd64        MIT Kerberos runtime libraries
ii  libkrb5support0:amd64 1.17-3+deb10u1                               
amd64        MIT Kerberos runtime libraries - Support library
ii  libnss-winbind:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        Samba nameservice integration plugins
ii  libpam-winbind:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        Windows domain authentication integration plugin
ii  libsmbclient:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        shared library for communication with SMB/CIFS servers
ii  libwbclient0:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        Samba winbind client library
ii  python-samba 2:4.9.5+dfsg-5+deb10u1                       
amd64        Python bindings for Samba
ii  python3-xattr 0.9.6-1                                      
amd64        module for manipulating filesystem extended attributes - 
Python 3
ii  samba 2:4.9.5+dfsg-5+deb10u1                       amd64        
SMB/CIFS file, print, and login server for Unix
ii  samba-common 2:4.9.5+dfsg-5+deb10u1                       
all          common files used by both the Samba server and client
ii  samba-common-bin 2:4.9.5+dfsg-5+deb10u1                       
amd64        Samba common files used by both the server and the client
ii  samba-dsdb-modules:amd64 
2:4.9.5+dfsg-5+deb10u1                       amd64        Samba 
Directory Services Database
ii  samba-libs:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        Samba core libraries
ii  samba-vfs-modules:amd64 2:4.9.5+dfsg-5+deb10u1                       
amd64        Samba Virtual FileSystem plugins
ii  spice-client-glib-usb-acl-helper 
0.35-2                                       amd64        Helper tool to 
validate usb ACLs
ii  winbind 2:4.9.5+dfsg-5+deb10u1                       amd64        
service to resolve user and group information from Windows NT servers
ii  xattr 0.9.6-1                                      amd64        tool 
for manipulating filesystem extended attributes

-----------

========================================================================================
========================================================================================


bye
Nicola



On 1/25/21 11:00 AM, Rowland penny via samba wrote:
> On 25/01/2021 09:49, Nicola Mingotti via samba wrote:
>>
>> Hi Luois,
>>
>> Going toward the path you suggest I get:
>>
>> p at linte> mount | grep ' / '
>> /dev/vda1 on / type ext4 (rw,relatime,errors=remount-ro)
>>
>> p at linte> sudo tune2fs -l /dev/vda1  | grep -i defa
>> Default mount options:    user_xattr acl
>> Default directory hash:   half_md4
>>
>> But, then I checked another thing:
>>
>> p at linte> uname -a
>> Linux linte 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) 
>> x86_64 GNU/Linux
>>
>> p at nas> uname -a
>> Linux nas 4.19.0-12-amd64 #1 SMP Debian 4.19.152-1 (2020-10-18) 
>> x86_64 GNU/Linux
>>
>> => Given that both systems are Debian stable, it might be that kernel 
>> 4.19.0-13
>> has something broken regarding CIFS.
>>
>> I am going to try to change the kernel version and see what happens.
>>
> That should be easy, just run:
>
> apt update && apt upgrade
>
> I think we need more info here, can you download this script:
>
> https://github.com/thctlo/samba4/blob/master/samba-collect-debug-info.sh
>
> Run it on the computer, sanitise the output if required and post the 
> output here, do not attach it to a post, this list strips attachments.
>
> Rowland
>
>
>




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