From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: passt.top; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: passt.top; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Mu7KIs5b; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by passt.top (Postfix) with ESMTPS id 591E45A0265 for ; Sun, 22 Feb 2026 18:44:52 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1771782290; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=HbMJfyRguOwHEAhTUsNFr5yhlXuLzJtHS10CjEzZBsk=; b=Mu7KIs5b5E2A3FFAj/Vo4riUc7Ab2iZUq0TBZha4yqFoGN2FywjkTAdNANHds7hNMMntNf 5AP24u59H9rmuncGVQx1gScP/1nmRcB/F43hgdvs+Eenl52d174FqKKgM0h8f4P9O3rWQM WqsFXVUJoI70Lbeg/iZkKTCrGlzC46o= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-678-epVBQFiWNB-4TovrgwRYkQ-1; Sun, 22 Feb 2026 12:44:49 -0500 X-MC-Unique: epVBQFiWNB-4TovrgwRYkQ-1 X-Mimecast-MFC-AGG-ID: epVBQFiWNB-4TovrgwRYkQ_1771782288 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id DBA101956095; Sun, 22 Feb 2026 17:44:47 +0000 (UTC) Received: from jmaloy-thinkpadp16vgen1.rmtcaqc.csb (unknown [10.22.64.49]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D45B71800370; Sun, 22 Feb 2026 17:44:45 +0000 (UTC) From: Jon Maloy To: sbrivio@redhat.com, dgibson@redhat.com, david@gibson.dropbear.id.au, jmaloy@redhat.com, passt-dev@passt.top Subject: [PATCH v5 00/13] Introduce multiple addresses and late binding Date: Sun, 22 Feb 2026 12:44:32 -0500 Message-ID: <20260222174445.743845-1-jmaloy@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: wjfAl2PQkRbxMZ8ualUhBTcx_8ib_Yfrkv4dCOp6LYI_1771782288 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Message-ID-Hash: I2VD3TF2Z7CJMT5BJG72PVMUH4PU456B X-Message-ID-Hash: I2VD3TF2Z7CJMT5BJG72PVMUH4PU456B X-MailFrom: jmaloy@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: This series adds handling of multiple addresses into a unified address array, so that a guest can see the same addresses on his own interface. o All addresses are stored as union inany_addr o User configured addresses are marked with a USER flag. o Host provided addresses are marked with a HOST flag. o Link local addresses are also marked with a LINKLOCAL flag. o Addresses the guest is actually using are marked with an OBSERVED flag. o The address selected for IPv4 DHCP offers is marked with a DHCP flag. We also include a commit to support late binding of interfaces, addresses, and routes. v2: - Added the earlier standalone CIDR commit to the head of the series. - Replaced the guest namespace interface subscriptions with just an address observation feature, so that it works with both PASTA and PASST. - Unified 'no_copy_addrs' and 'copy_addrs' code paths, as suggested by David G. - Multiple other changes, also based on feedback from David. - Removed the host interface subscription patches, -for now. I intend to re-add them once this series is applied. - Outstanding question: When do we add an IPv4 link local address to the guest? Only in local/opaque mode? Only when explicitly requested? Always? v3: - Unified the IPv4 and IPv6 arrays into one array - Changed prefix_len to always be in IPv6/IpV4 mapped format - Updated migration protocol to v3, handling multiple addresses - Many other smaller changes, based on feedback from the PASST team v4: - Numerous changes based on feedback - Added several new commits, mostly broken out of the pre-existing ones. v5: - Re-introduced multiple OBSERVED addresses. This actually turned out to be cleaner and with more predictable behaviour than allowing only one. - Included the DHCP and NDP patches from previous versions, improved and updated according to feedback from the team. - Likewise re-included the host-side netlink commit to support late binding. Jon Maloy (13): ip: Introduce unified multi-address data structures ip: Introduce for_each_addr() macro for address iteration fwd: Unify guest accessibility checks with unified address array arp: Check all configured addresses in ARP filtering netlink: Return prefix length for IPv6 addresses in nl_addr_get() conf: Allow multiple -a/--address options per address family ip: Track observed guest IPv4 addresses in unified address array ip: Track observed guest IPv6 addresses in unified address array migrate: Rename v1 address functions to v2 for clarity migrate: Update protocol to v3 for multi-address support dhcp, dhcpv6: Select addresses for DHCP distribution ndp: Support advertising multiple prefixes in Router Advertisement netlink: Add host-side monitoring for late template interface binding arp.c | 15 +- conf.c | 200 +++++++++++++++---------- conf.h | 9 ++ dhcp.c | 30 ++-- dhcp.h | 2 +- dhcpv6.c | 78 +++++++--- dhcpv6.h | 2 +- epoll_type.h | 2 + fwd.c | 263 +++++++++++++++++++++++++-------- fwd.h | 9 ++ inany.h | 3 + ip.h | 5 + isolation.c | 5 + migrate.c | 183 ++++++++++++++++++++--- ndp.c | 134 ++++++++++++----- netlink.c | 401 ++++++++++++++++++++++++++++++++++++++++++++++++++- netlink.h | 3 + passt.c | 5 + passt.h | 104 +++++++++++-- pasta.c | 39 +++-- tap.c | 67 ++++++--- 21 files changed, 1282 insertions(+), 277 deletions(-) -- 2.52.0