Bug 12784 - tar backups to a Drobo FS via iscsi results in CIFS VFS: Error -11 sending data on socket to server
Summary: tar backups to a Drobo FS via iscsi results in CIFS VFS: Error -11 sending da...
Status: NEW
Alias: None
Product: CifsVFS
Classification: Unclassified
Component: kernel fs (show other bugs)
Version: 3.x
Hardware: All Linux
: P5 major
Target Milestone: ---
Assignee: Steve French
QA Contact: cifs QA contact
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-05-10 14:24 UTC by RobbieTheK
Modified: 2020-07-16 00:12 UTC (History)
0 users

See Also:

Attachments
pcap tcpdump (986.24 KB, application/vnd.tcpdump.pcap)
2017-05-10 14:24 UTC, RobbieTheK 		no flags Details
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Description RobbieTheK 2017-05-10 14:24:43 UTC 
Created attachment 13205 [details]
pcap tcpdump

Fedora 25 4.10.12-200.fc25.x86_64

May  8 01:08:10 ourserver kernel: cifs_vfs_err: 2 callbacks suppressed
May  8 01:08:10 ourserver kernel: CIFS VFS: Server ourserver has not responded in 120 seconds. Reconnecting...
May  8 01:10:01 ourserver kernel: CIFS VFS: sends on sock ffff9f2900764f00 stuck for 15 seconds
May  8 01:10:01 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server
May  8 01:10:45 ourserver kernel: CIFS VFS: sends on sock ffff9f2900764f00 stuck for 15 seconds
May  8 01:10:45 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server

Some quick tcpdumps here and attached.

tcpdump -i eth1 dst 150.108.68.23
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 262144 bytes
09:22:27.531730 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 16094418:16094496, ack 1007917777, win 1444, options [nop,nop,TS val 1309722776 ecr 610290778], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:22:27.533726 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 139, win 1444, options [nop,nop,TS val 1309722778 ecr 610296772], length 0

2 packets captured
162 packets received by filter
132 packets dropped by kernel

tcpdump -r 0001.pcap 
reading from file 0001.pcap, link-type EN10MB (Ethernet)
09:24:27.543960 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 16094574:16094652, ack 1007918057, win 1444, options [nop,nop,TS val 1309842788 ecr 610302772], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:24:27.545920 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 139, win 1444, options [nop,nop,TS val 1309842790 ecr 610308773], length 0
09:25:27.588025 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 78:156, ack 139, win 1444, options [nop,nop,TS val 1309902832 ecr 610308773], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:25:27.590163 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 277, win 1444, options [nop,nop,TS val 1309902834 ecr 610314777], length 0
09:26:27.591645 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 156:234, ack 277, win 1444, options [nop,nop,TS val 1309962836 ecr 610314777], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:26:27.594086 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 415, win 1444, options [nop,nop,TS val 1309962838 ecr 610320777], length 0
09:27:27.587607 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 234:312, ack 415, win 1444, options [nop,nop,TS val 1310022832 ecr 610320777], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:27:27.589750 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 553, win 1444, options [nop,nop,TS val 1310022834 ecr 610326777], length 0
09:28:27.147262 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 557, win 1444, options [nop,nop,TS val 1310082392 ecr 610332733], length 0
09:28:27.554668 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [P.], seq 312:390, ack 557, win 1444, options [nop,nop,TS val 1310082799 ecr 610332733], length 78 SMB PACKET: SMBtrans2 (REQUEST)

09:28:27.556524 IP ourdomain.54730 > drobo-rh.ourdomain.microsoft-ds: Flags [.], ack 695, win 1444, options [nop,nop,TS val 1310082801 ecr 610332773], length 0