From: Steffen Klassert Date: Mon, 9 Dec 2024 09:09:40 +0000 (+0100) Subject: Merge branch 'Add IP-TFS mode to xfrm' X-Git-Tag: v6.14-rc1~162^2~102^2~2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=59af653a6998ce0a79aa7f8851b0d5ecc667579b;p=thirdparty%2Fkernel%2Flinux.git Merge branch 'Add IP-TFS mode to xfrm' Christian Hopps says: ==================== * Summary of Changes: This patchset adds a new xfrm mode implementing on-demand IP-TFS. IP-TFS (AggFrag encapsulation) has been standardized in RFC9347. Link: https://www.rfc-editor.org/rfc/rfc9347.txt This feature supports demand driven (i.e., non-constant send rate) IP-TFS to take advantage of the AGGFRAG ESP payload encapsulation. This payload type supports aggregation and fragmentation of the inner IP packet stream which in turn yields higher small-packet bandwidth as well as reducing MTU/PMTU issues. Congestion control is unimplementated as the send rate is demand driven rather than constant. In order to allow loading this fucntionality as a module a set of callbacks xfrm_mode_cbs has been added to xfrm as well. Patchset Structure: ------------------- The first 5 commits are changes to the net and xfrm infrastructure to support the callbacks as well as more generic IP-TFS additions that may be used outside the actual IP-TFS implementation. - xfrm: config: add CONFIG_XFRM_IPTFS - include: uapi: protocol number and packet structs for AGGFRAG in ESP - xfrm: netlink: add config (netlink) options - xfrm: add mode_cbs module functionality - xfrm: add generic iptfs defines and functionality The last 10 commits constitute the IP-TFS implementation constructed in layers to make review easier. The first 9 commits all apply to a single file `net/xfrm/xfrm_iptfs.c`, the last commit adds a new tracepoint header file along with the use of these new tracepoint calls. - xfrm: iptfs: add new iptfs xfrm mode impl - xfrm: iptfs: add user packet (tunnel ingress) handling - xfrm: iptfs: share page fragments of inner packets - xfrm: iptfs: add fragmenting of larger than MTU user packets - xfrm: iptfs: add basic receive packet (tunnel egress) handling - xfrm: iptfs: handle received fragmented inner packets - xfrm: iptfs: add reusing received skb for the tunnel egress packet - xfrm: iptfs: add skb-fragment sharing code - xfrm: iptfs: handle reordering of received packets - xfrm: iptfs: add tracepoint functionality ==================== Signed-off-by: Steffen Klassert --- 59af653a6998ce0a79aa7f8851b0d5ecc667579b