Samba currupting data

[ErnieW]

Just to confirm that the problem I reported on this thread viewtopic.php?f=57&t=7669 di indeed seem to be a file transfer problem in kernel 3.16. I downloaded a TV recording made with tvheadend on a Pogo E02 running kernel 3.16 and got loads of file errors when processing it with ProjectX. Downgrading the tPogo to kernel 3.15, downloading the same file and running it through ProjectX again gave me no errors.

[ebbix]

$this->bbcode_second_pass_quote('ErnieW', 'J')ust to confirm that the problem I reported on this thread viewtopic.php?f=57&t=7669 di indeed seem to be a file transfer problem in kernel 3.16. I downloaded a TV recording made with tvheadend on a Pogo E02 running kernel 3.16 and got loads of file errors when processing it with ProjectX. Downgrading the tPogo to kernel 3.15, downloading the same file and running it through ProjectX again gave me no errors.

[bodhi]

Another test I did, without TCP tweaks mentioned above:

- 2 Kirkwood plugs running Debian 3.16.0, connected to the same Gb switch. Both running samba and smbnetfs.
- samba were mounted as:
$this->bbcode_second_pass_code('', 'root 2571 1 0 02:26 ? 00:03:56 /sbin/mount.ntfs /dev/sdc1 /media/HOME -o rw,noatime,big_writes
root 3622 2184 0 14:08 ? 00:00:00 smbnetfs -o allow_other -o config=/root/.smb/smbnetfs.conf /media/net
')
- On the 1st plug, copy a 4.4G file from the second plug:
$this->bbcode_second_pass_code('', 'cp -a /media/net/WORKGROUP/HOMEMEDIA2/media/HOME/Movies/test.mkv .
')
- The checksum matched. There was no error.

[fanyangto]

My sendfile is already the default (false) as "true" will cause video play glitches.

[bodhi]

$this->bbcode_second_pass_quote('bodhi', 'A')nother test I did, without TCP tweaks mentioned above:

- 2 Kirkwood plugs running Debian 3.16.0, connected to the same Gb switch. Both running samba and smbnetfs.
- samba were mounted as:
$this->bbcode_second_pass_code('', 'root 2571 1 0 02:26 ? 00:03:56 /sbin/mount.ntfs /dev/sdc1 /media/HOME -o rw,noatime,big_writes
root 3622 2184 0 14:08 ? 00:00:00 smbnetfs -o allow_other -o config=/root/.smb/smbnetfs.conf /media/net
')
- On the 1st plug, copy a 4.4G file from the second plug:
$this->bbcode_second_pass_code('', 'cp -a /media/net/WORKGROUP/HOMEMEDIA2/media/HOME/Movies/test.mkv .
')
- The checksum matched. There was no error.

[moonman]

Yeah disabling TSO seems to help. Thanks ebbix.
I've vreated a systemd unit that seems to work. Test and report:

/etc/systemd/system/tso_disable@.service
$this->bbcode_second_pass_code('', '[Unit]
Description=Disable TCP segmentation offload for %i
Requires=network.target
After=network.target

[Service]
ExecStart=/usr/bin/ethtool -K %i tso off
Type=oneshot

[Install]
WantedBy=multi-user.target
')

then
$this->bbcode_second_pass_code('', 'systemctl daemon-reload
systemctl enable tso_disable@eth0')

[ebbix]

Glad it works for you. Took only 13 kernel builds for bisecting

In case anyone wants to disable TSO via udev (I use this method):
$this->bbcode_second_pass_code('', '$ cat /etc/udev/rules.d/50-eth.rules
# Disable TCP segmentation offload due to bugs
ACTION=="add", SUBSYSTEM=="net", KERNEL=="eth0", RUN+="/usr/bin/ethtool -K %k tso off"')

[moonman]

$this->bbcode_second_pass_quote('ebbix', 'G')lad it works for you. Took only 13 kernel builds for bisecting

In case anyone wants to disable TSO via udev (I use this method):
$this->bbcode_second_pass_code('', '$ cat /etc/udev/rules.d/50-eth.rules
# Disable TCP segmentation offload due to bugs
ACTION=="add", SUBSYSTEM=="net", KERNEL=="eth0", RUN+="/usr/bin/ethtool -K %k tso off"')

[ebbix]

For me it's working...
$this->bbcode_second_pass_code('', '$ ethtool -k eth0 | grep tcp
tcp-segmentation-offload: off
tx-tcp-segmentation: off
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp6-segmentation: off [fixed]')

[moonman]

Yeah it works. I misspelled eht0 udev is cleaner and probably more reliable. Cheers