Hello, I first posted this question to the IRC but it was suggested I also post
here for better visibility. I am currently having a bit of trouble with Gluster,
Samba, and the VFS plug-in between them. I am also posting this to the Gluster
mailing list.
The behavior I am seeing is that by using the samba-vfs-gluster plug-in the case
sensitivity setting for Samba breaks in a subtle but noticeable way. Windows
clients are unable to do a ?does file exist? check when one of the directory
names in the path is not the correct case (/RELEASE_1234/ vs /release_1234/). An
old Delphi client program first exposed this bug but I?ve been able to reproduce
it in Java. The confusing part to me is Windows explorer is able to navigate
straight to the file even if the incorrect case is used and once Windows has
opened a connection to that directory subsequent file look-ups succeed even when
using the incorrect case. I suspect there is Windows or Samba caching magic
happening there, but that is beyond me. Mounting the Gluster volume to one of
the nodes locally then sharing that through Samba fixes the problem but I?ve
found this arrangement to have terrible performance.
Below is my smb.conf that produces the problem. Below that are log snippets I
grabbed that I believe highlight the issue. In a correctly working setup the
incoming RELEASE is converted to lowercase at the ?unix_convert? point. In the
VFS setup, it remains all caps.
This behavior has been reproduced on two seperate systems. One is CentOS7, Samba
4.1.1-37, samba-vfs-glusterfs.x86_64 4.1.1-37, Gluster version 3.5.2. Other is
CentOS 6.5, Samba 3.6, samba-glusterfs.x86_64 ?3.6.23-12, Gluster version 3.5.2.
[global]? ? ? ? workgroup = ourWorkGroup? ? ? ? server string = testHost
? ? ? ? netbios name = testHost? ? ? ? netbios aliases = testHost; ? ? ?
?clustering = yes? ? ? ? idmap backend = tdb2; ? ? ? ?private dir =
/mnt/gv-00/lock
? ? ? ? security = user? ? ? ? map to guest = bad user? ? ? ? guest account =
sharedSmbLogin? ? ? ? password server = 192.168.0.222? ? ? ? log file =
/var/log/samba/log.%m? ? ? ? max log size = 50? ? ? ? log level = 5? ? ? ? dns
proxy = No? ? ? ? hosts allow = 192.168.? ? ? ? unix extensions = no? ? ? ? wide
links = yes
[raid]? ? ? ? wide links = no? ? ? ? writeable = yes? ? ? ? path = /? ? ? ?
public = yes? ? ? ? read only = no? ? ? ? guest ok = yes? ? ? ? guest only =
yes? ? ? ? write list = @smbgroup? ? ? ? create mode = 660? ? ? ? directory mode
= 770? ? ? ? create mask = 0666? ? ? ? directory mask = 0775? ? ? ? preserve
case = yes? ? ? ? unix extensions = no? ? ? ? case sensitive = no?? ? ? ?
;default case = lower? ? ? ? kernel share modes = no? ? ? ? posix locking = no?
? ? ? vfs objects = glusterfs? ? ? ? glusterfs:volfile_server = localhost? ? ? ?
glusterfs:volume = gv-00? ? ? ? glusterfs:logfile =
/var/log/glusterfs/gv-00.log? ? ? ? glusterfs:loglevel = 10
testHost - Samba mounting gluster volume which is mounted via FUSEdefault case
sensitivity - works as expected[2014/10/30 11:46:50.302252, ?3]
smbd/process.c:1467(switch_message)? switch message SMBtrans2 (pid 23296) conn
0x7ff2f5310a40[2014/10/30 11:46:50.302357, ?4] smbd/uid.c:351(change_to_user)?
Skipping user change - already user[2014/10/30 11:46:50.302461, ?3]
smbd/trans2.c:5111(call_trans2qfilepathinfo)? call_trans2qfilepathinfo:
TRANSACT2_QPATHINFO: level = 1034[2014/10/30 11:46:50.302567, ?5]
smbd/filename.c:257(unix_convert)? unix_convert called on file
"RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon"[2014/10/30
11:46:50.302747, ?3] smbd/vfs.c:905(check_reduced_name)? check_reduced_name
[release_2268/150373E7A0148258/150817BC917FFB00.zon] [/mnt/gv-00][2014/10/30
11:46:50.302883, ?3] smbd/vfs.c:1039(check_reduced_name)? check_reduced_name:
release_2268/150373E7A0148258/150817BC917FFB00.zon reduced to
/mnt/gv-00/release_2268/150373E7A0148258/150817BC917FFB00.zon[2014/10/30
11:46:50.303004, ?3] smbd/trans2.c:5255(call_trans2qfilepathinfo)?
call_trans2qfilepathinfo release_2268/150373E7A0148258/150817BC917FFB00.zon
(fnum = -1) level=1034 call=5 total_data=0[2014/10/30 11:46:50.303112, ?5]
smbd/trans2.c:4223(smbd_do_qfilepathinfo)? smbd_do_qfilepathinfo:
release_2268/150373E7A0148258/150817BC917FFB00.zon (fnum = -1) level=1034
max_data=56 testHost - Samba using vfs-glusterdefault case sensitivity -
behaving as if case sensitivity is enabled[2014/10/30 11:52:13.488127, ?3]
smbd/process.c:1414(switch_message)? switch message SMBtrans2 (pid 8411) conn
0x7f6ecee9a740[2014/10/30 11:52:13.488186, ?4] smbd/uid.c:351(change_to_user)?
Skipping user change - already user[2014/10/30 11:52:13.488246, ?3]
smbd/trans2.c:5240(call_trans2qfilepathinfo)? call_trans2qfilepathinfo:
TRANSACT2_QPATHINFO: level = 1004[2014/10/30 11:52:13.488310, ?5]
smbd/filename.c:257(unix_convert)? unix_convert called on file
"RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon"[2014/10/30
11:52:13.488371, ?5] smbd/filename.c:416(unix_convert)? unix_convert begin: name
= RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon, dirpath = , start =
RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon[2014/10/30 11:52:13.493304,
?5] smbd/filename.c:682(unix_convert)? Intermediate not found
RELEASE_2268[2014/10/30 11:52:13.493424, ?3] smbd/error.c:81(error_packet_set)?
error packet at smbd/trans2.c(5276) cmd=50 (SMBtrans2)
NT_STATUS_UNSUCCESSFUL??case sensitivity = no - still not finding the
file[2014/10/30 11:53:11.096059, ?5]
auth/token_util.c:527(debug_unix_user_token)? UNIX token of user 270? Primary
group is 501 and contains 0 supplementary groups[2014/10/30 11:53:11.096376, ?5]
smbd/uid.c:317(change_to_user_internal)? Impersonated user: uid=(0,270),
gid=(0,501)[2014/10/30 11:53:11.096458, ?3]
smbd/trans2.c:5240(call_trans2qfilepathinfo)? call_trans2qfilepathinfo:
TRANSACT2_QPATHINFO: level = 1004[2014/10/30 11:53:11.096607, ?5]
smbd/filename.c:257(unix_convert)? unix_convert called on file
"RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon"[2014/10/30
11:53:11.096703, ?5] smbd/filename.c:416(unix_convert)? unix_convert begin: name
= RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon, dirpath = , start =
RELEASE_2268/150373E7A0148258/150817BC917FFB00.zon[2014/10/30 11:53:11.101561,
?5] smbd/filename.c:682(unix_convert)? Intermediate not found
RELEASE_2268[2014/10/30 11:53:11.101678, ?3] smbd/error.c:81(error_packet_set)?
error packet at smbd/trans2.c(5276) cmd=50 (SMBtrans2)
NT_STATUS_UNSUCCESSFUL[2014/10/30 11:53:11.101743, ?5] lib/util.c:332(show_msg)
