I found the following error trying to log in by ssh to a FreeBSD 10.3 HVM Xen guest.
xn_txeof: WARNING: response is -1!
The fix for this is to apply this patch
https://svnweb.freebsd.org/base?view=revision&revision=299542
| Author: | royger |
|---|---|
| Date: | Thu May 12 16:18:02 2016 UTC (6 weeks, 6 days ago) |
| Changed paths: | 1 |
| Log Message: |
xen-netfront: fix feature detection Current netfront code relies on xs_scanf returning a value < 0 on error, which is not right, xs_scanf returns a positive value on error. MFC after: 3 days Tested by: Stephen Jones <StephenJo@LivingComputerMuseum.org> Sponsored by: Citrix Systems R&D |
You need to choose install sources when installing FreeBSD as with this bug networking does not work to fetch the source code.
Apply the patch to /usr/src/sys/dev/xen/netfront/netfront.c, or just search for xs_scanf and change the condition from < 0 to !=0.
from
«feature-sg», NULL, «%d», &val) < 0)
to
«feature-sg», NULL, «%d», &val) !=0)
| revision 299541 by sephe, Fri Apr 1 06:28:33 2016 UTC | revision 299542 by royger, Thu May 12 16:18:02 2016 UTC | |
|---|---|---|
| # | Line 2016 xn_query_features(struct netfront_info * | Line 2016 xn_query_features(struct netfront_info * |
| 2016 | device_printf(np->xbdev, «backend features:»); | device_printf(np->xbdev, «backend features:»); |
| 2017 | ||
| 2018 | if (xs_scanf(XST_NIL, xenbus_get_otherend_path(np->xbdev), | if (xs_scanf(XST_NIL, xenbus_get_otherend_path(np->xbdev), |
| 2019 | «feature-sg», NULL, «%d», &val) < 0) | «feature-sg», NULL, «%d», &val) != 0) |
| 2020 | val = 0; | val = 0; |
| 2021 | ||
| 2022 | np->maxfrags = 1; | np->maxfrags = 1; |
| # | Line 2026 xn_query_features(struct netfront_info * | Line 2026 xn_query_features(struct netfront_info * |
| 2026 | } | } |
| 2027 | ||
| 2028 | if (xs_scanf(XST_NIL, xenbus_get_otherend_path(np->xbdev), | if (xs_scanf(XST_NIL, xenbus_get_otherend_path(np->xbdev), |
| 2029 | «feature-gso-tcpv4», NULL, «%d», &val) < 0) | «feature-gso-tcpv4», NULL, «%d», &val) != 0) |
| 2030 | val = 0; | val = 0; |
| 2031 | ||
| 2032 | np->xn_ifp->if_capabilities &= ~(IFCAP_TSO4|IFCAP_LRO); | np->xn_ifp->if_capabilities &= ~(IFCAP_TSO4|IFCAP_LRO); |
Then rebuild your kernel as usual.
# make buildkernel KERNCONF=GENERIC
# make installkernel KERNCONF=GENERIC
# reboot
now boot with the new kernel
Now connectivity to your Xen guest should work 🙂
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