Date: Fri, 19 Aug 2011 08:30:19 GMT From: Paul Herman <pherman@frenchfries.net> To: freebsd-net@FreeBSD.org Subject: Re: kern/127050: [carp] ipv6 does not work on carp interfaces [regression] Message-ID: <201108190830.p7J8UJPW041136@freefall.freebsd.org>
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The following reply was made to PR kern/127050; it has been noted by GNATS. From: Paul Herman <pherman@frenchfries.net> To: bug-followup@FreeBSD.org Cc: Wouter de Jong <maddog2k@maddog2k.net>, Jacek Zapala <jacek@it.pl> Subject: Re: kern/127050: [carp] ipv6 does not work on carp interfaces [regression] Date: Fri, 19 Aug 2011 10:13:46 +0200 This is a multi-part message in MIME format. --------------010305010708060807000808 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit This one's been bothering me too, so I setup a test machine yesterday to figure out what's going on. I see two problems here. First of all, in6_ifinit() (called via in6_control() SIOCAIFADDR_IN6 -> in6_update_ifa()) only calls carp_ioctl() on the first IPv6 address. Whereas in the v4 case, carp_ioctl() does get called by in_ifinit() every time. Second of all, carp_set_addr6() (called via carp_ioctl()) only joins the CARP multicast group AND the solicitation group with the first address. The attached patch against 8-STABLE fixes these issues, alias IPs are now pingable. I have not tested actual carp functionality with a 2nd BACKUP carp. What this patch doesn't address is group membership removal when alias IPs are deleted (apparently also broken.) Try it out, if it works for you guys, maybe someone more familiar with in[6]_control() can chime in here and comment on a *real* way to fix this issue. :-) Cheers, -Paul. --------------010305010708060807000808 Content-Type: application/gzip; name="carp_ip6_alias.patch.gz" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="carp_ip6_alias.patch.gz" H4sICDwXTk4CA2NhcnBfaXA2X2FsaWFzLnBhdGNoAJVVa0+jQBT9TH/F9UsDHbDQWvramhof CVlfsZpN1hiCCDobYAhD42Pd/753mNIHtlZJyuvee+7pOXcGwzCAv/JmEuQUf3aTJvauv8sy +qi0TMsyzJ5h9cHsDszeoG3umuUBRJxrhJA19dXS/qDT/lA6HoNhdffaehfI7Doe16AGCvWM feq53sNDBiNocMQcYsBQaAgqDT2fTZMcfozAgnodaJhieuhS5ueRBn9rpMirJL6/zxPz1zSA 0Qick2v38ODqUluLAooSZBkTDNTGahShUx0mzsXhxDk5ODq60kH1BVs316inDUWtoFDUz7AU nkYvKsegsSp5k6au72XpetU7rUHH3qb6AqJSbXUG5gbh7a6p91F4cbWsQnmF59nUz0FAuci/ 4dNwuHiNLuDbwpQG9XRxclcTUtuNWZpTlnCMxjZD7ercN/a574rHIVqzBBZPo5xiYmLHlTZF E+m6QtFB9pzoUKgp5oDg29IacygnBtV2zm3XmbjCD/fmfHJ5fOicOMdHal3MD3IogTXhiBy+ Vl/vieFrW7otJfg3h9uZEU9EDbdFkaFspG8UnuN/xDHBswz6Hs9RohR54lkyVZoN+MNoAmLy YJ4GokvAUbdmuTA6emuvWBnFTcFOUR5ZzsCPAi+ZpsNqzyC+DzL+RNNb8070nAm7nJNM46U8 ToigbixYcRZRn+bBw3pqmHn/FmRMrSO4Dpy+BSxU8V4Tg42dcPVzKbNlSxZPOY6Dar6Eodn6 kNRu3Vp30sYPgVZZHanWusK2iFe8XQlXa3q3VoEpuMiY2E6wkgc591kazP5VsbrPb05PNdjB bE2kVoSXwDGCibziuZzIYjR8V6gp9wkJKvLkfawj5ry/3CM2tFjrrbXw1tjmrRxo8lV7ySfu ki+YSzZ4Sz63lnzfWbLZWPJlX0lVc7LqKvm2qWTZ03Xw2xwlWwwl5e5UfpHEZj37xOB2jTix F0XMV2fmiT1c0+Gs+NDpIgvwOHN/HTjXFz/fz9zfx1cXSPw/VIIrJwgIAAA= --------------010305010708060807000808--
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