Public bug reported:
Binary package hint: ltspfs
I'm trying to use USB key with thin-client.
The key is mounted as /var/run/drives/KINGSTON and I can list the
content. I tought that after 5 seconds, the mount point was unmounted. I
looked to the code, and I saw that the umount should happen. So,
something is going wrong, because the select timeout is never reached.
I took tcpdump to look at the network packets, and I found this :
# tcpdump -q -i eth0 port 9220
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
23:09:31.156622 IP ubuntu.local.42315 > 172.20.0.250.9220: tcp 16
23:09:31.157135 IP 172.20.0.250.9220 > ubuntu.local.42315: tcp 60
23:09:31.157155 IP ubuntu.local.42315 > 172.20.0.250.9220: tcp 0
23:09:31.656683 IP ubuntu.local.42315 > 172.20.0.250.9220: tcp 16
23:09:31.658275 IP 172.20.0.250.9220 > ubuntu.local.42315: tcp 60
23:09:31.658287 IP ubuntu.local.42315 > 172.20.0.250.9220: tcp 0
Why does the ltspfs is always sending data like this? Opened with
wireshark, it seems that there is a cycle with a period of 0.5 second.
ltspfs > ltspfsd : PSH, ACK -> TCP CHECKSUM INCORRECT
ltspfsd > ltspfs : PSH, ACK
ltspfs > ltspfsd : ACK
and the cycle starts again.
Does the TCP checksum have something to do with that?
** Affects: ltspfs (Ubuntu)
Importance: Undecided
Status: New
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ltspfsd doesn't unmount USB device
https://bugs.launchpad.net/bugs/174585
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