Bug 231444
| Summary: | dhclient broken in Xen guest - need xen-checksum patch | ||||||||||
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| Product: | [Fedora] Fedora | Reporter: | Mark McLoughlin <markmc> | ||||||||
| Component: | dhcp | Assignee: | David Cantrell <dcantrell> | ||||||||
| Status: | CLOSED RAWHIDE | QA Contact: | |||||||||
| Severity: | medium | Docs Contact: | |||||||||
| Priority: | medium | ||||||||||
| Version: | rawhide | CC: | bstein, dcantrell, herbert.xu, xen-maint | ||||||||
| Target Milestone: | --- | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | All | ||||||||||
| OS: | Linux | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | Environment: | ||||||||||
| Last Closed: | 2007-04-11 14:30:13 UTC | Type: | --- | ||||||||
| Regression: | --- | Mount Type: | --- | ||||||||
| Documentation: | --- | CRM: | |||||||||
| Verified Versions: | Category: | --- | |||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||
| Embargoed: | |||||||||||
| Attachments: |
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Created attachment 149561 [details]
linux-2.6.19-packet-auxdata-csum.patch
Created attachment 149562 [details]
dhcp-3.0.5-xen-checksum.patch
(Sorry, bug #219681 is the link to the RHEL5 bug) Okay, linux-2.6-xen.patch in rawhide kernel-xen-2.6.20-2925.5.fc7 has Herbert's original patch and his subsequent fix, both of which were sent upstream here: http://www.mail-archive.com/netdev@vger.kernel.org/msg29299.html So, what's needed is the xen-checksum patch which was removed from rawhide. Moving to dhcp. Created attachment 152271 [details]
dhcp-3.0.5-xen-checksum.patch
Both dhcp-3.0.5-xen-checksum.patch patches are identical, both fix the problem with rawhide kernel and dhclient Patch applied to dhcp-3.0.5-30.fc7 in rawhide. Thanks. |
kernel-xen-2.6.19-1.2898.2.3.fc7 dhclient-3.0.5-25.2.fc7 Basically, running dhclient in a Xen guest, dhclient is ignoring DHCP relies and I'm seeing this in syslog: Mar 7 12:11:29 localhost dhclient: 5 bad udp checksums in 5 packets The background to this is that packets from Xen guests on the same host only have partial checksums. (Not sure why) In rh #219681, Herbert proposed a set of patches to fix this - first make the TP_STATUS_CSUMNOTREADY flag available via recvmsg() auxdata and, second, make dhclient check this flag and ignore the checksums if its set. These patches aren't in rawhide, but I've tried applying the patches and it seems dhclient isn't seeing the replies at all now - i.e. I'm seeing this in the strace: select(7, [5 6], [], [], {7, 996967}) = 0 (Timeout) gettimeofday({1173356524, 521}, NULL) = 0 time([1173356524]) = 1173356524 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3533, ...}) = 0 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3533, ...}) = 0 stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3533, ...}) = 0 sendto(3, "<30>Mar 8 12:22:04 dhclient: DH"..., 89, MSG_NOSIGNAL, NULL, 0) = 89 write(2, "DHCPDISCOVER on eth0 to 255.255."..., 59) = 59 write(2, "\n", 1) = 1 write(6, "\377\377\377\377\377\377\0\26>l\5\0\10\0E\20\1H\0\0\0\0"..., 342) = 342 gettimeofday({1173356524, 1094}, NULL) = 0 select(7, [5 6], [], [], {11, 998906}) = 0 (Timeout) Attaching the patches as I've built them.