kern/183139: ifconfig options on xn0 lost after xen vm migration to another server

Adam McDougall mcdouga9 at egr.msu.edu
Mon Oct 21 00:50:00 UTC 2013


>Number:         183139
>Category:       kern
>Synopsis:       ifconfig options on xn0 lost after xen vm migration to another server
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 21 00:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Adam McDougall
>Release:        9.2-PRERELEASE
>Organization:
>Environment:
FreeBSD hostname 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #0 r255480: Wed Sep 11 19:30:27 EDT 2013     root at build9:/usr/obj/proto/src9/src/sys/AMD64-9  amd64

>Description:
If I change the "options" on any of the xn network interfaces with ifconfig then perform a xenmotion, the options are reset to default after the xenmotion.  This is on a server with XenServer 6.0.2 running fairly recent patches.  I plan to re-test on XenServer 6.2 but we don't have a pool setup yet.  I'd test on FreeBSD 10 but xen-tools needs to be built with gcc instead of clang and I haven't put much effort into that yet.
>How-To-Repeat:
# ifconfig xn0
xn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=503<RXCSUM,TXCSUM,TSO4,LRO>

# ifconfig xn0 -rxcsum
# ifconfig xn0 -lro
# ifconfig xn0
xn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=102<TXCSUM,TSO4>

(perform xenmotion)

# ifconfig xn0
xn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=503<RXCSUM,TXCSUM,TSO4,LRO>


>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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