patch release: v7

Signed-off-by: Christian Hopps <[email protected]>

patches/v7/v7-0000-cover-letter.patch

@@ -0,0 +1,134 @@
+Subject: [PATCH ipsec-next v7 00/16] Add IP-TFS mode to xfrm
+
+* 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 Changes:
+-----------------
+
+  21 files changed, 3370 insertions(+), 19 deletions(-)
+  include/net/xfrm.h         |   44 +
+  include/uapi/linux/in.h    |    2 +
+  include/uapi/linux/ip.h    |   16 +
+  include/uapi/linux/ipsec.h |    3 +-
+  include/uapi/linux/snmp.h  |    3 +
+  include/uapi/linux/xfrm.h  |    9 +-
+  net/ipv4/esp4.c            |    3 +-
+  net/ipv6/esp6.c            |    3 +-
+  net/netfilter/nft_xfrm.c   |    3 +-
+  net/xfrm/Kconfig           |   16 +
+  net/xfrm/Makefile          |    1 +
+  net/xfrm/trace_iptfs.h     |  218 ++++
+  net/xfrm/xfrm_compat.c     |   10 +-
+  net/xfrm/xfrm_device.c     |    4 +-
+  net/xfrm/xfrm_input.c      |   18 +-
+  net/xfrm/xfrm_iptfs.c      | 2864 ++++++++++++++++++++++++++++++++++++++++++++
+  net/xfrm/xfrm_output.c     |    6 +
+  net/xfrm/xfrm_policy.c     |   26 +-
+  net/xfrm/xfrm_proc.c       |    3 +
+  net/xfrm/xfrm_state.c      |   60 +
+  net/xfrm/xfrm_user.c       |   77 ++
+
+Patchset Structure:
+-------------------
+
+The first 6 commits are changes to the 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: add ip_tfs_*_hdr packet formats
+  - include: uapi: add IPPROTO_AGGFRAG 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
+
+Patchset History:
+-----------------
+
+RFCv1 (11/10/2023)
+
+RFCv1 -> RFCv2 (11/12/2023)
+
+  Updates based on feedback from Simon Horman, Antony,
+  Michael Richardson, and kernel test robot.
+
+RFCv2 -> v1 (2/19/2024)
+
+  Updates based on feedback from Sabrina Dubroca, kernel test robot
+
+v1 -> v2 (5/19/2024)
+
+  Updates based on feedback from Sabrina Dubroca, Simon Horman, Antony.
+
+  o Add handling of new netlink SA direction attribute (Antony).
+  o Split single patch/commit of xfrm_iptfs.c (the actual IP-TFS impl)
+    into 9+1 distinct layered functionality commits for aiding review.
+  - xfrm: fix return check on clone() callback
+  - xfrm: add sa_len() callback in xfrm_mode_cbs for copy to user
+  - iptfs: remove unneeded skb free count variable
+  - iptfs: remove unused variable and "breadcrumb" for future code.
+  - iptfs: use do_div() to avoid "__udivd13 missing" link failure.
+  - iptfs: remove some BUG_ON() assertions questioned in review.
+
+v2->v3
+  - Git User Glitch
+
+v2->v4 (6/17/2024)
+
+  - iptfs: copy only the netlink attributes to user based on the
+    direction of the SA.
+
+  - xfrm: stats: in the output path check for skb->dev == NULL prior to
+    setting xfrm statistics on dev_net(skb->dev) as skb->dev may be NULL
+    for locally generated packets.
+
+  - xfrm: stats: fix an input use case where dev_net(skb->dev) is used
+    to inc stats after skb is possibly NULL'd earlier. Switch to using
+    existing saved `net` pointer.
+
+v4->v5 (7/14/2024)
+  - uapi: add units to doc comments
+  - iptfs: add MODULE_DESCRIPTION()
+  - squash nl-direction-update commit
+
+v5->v6 (7/31/2024)
+  * sysctl: removed IPTFS sysctl additions
+  - xfrm: use array of pointers vs structs for mode callbacks
+  - iptfs: eliminate a memleak during state alloc failure
+  - iptfs: free send queue content on SA delete
+  - add some kdoc and comments
+  - cleanup a couple formatting choices per Steffen
+
+v6->v7 (8/1/2024)
+ - Rebased on latest ipsec-next

patches/v7/v7-0001-xfrm-config-add-CONFIG_XFRM_IPTFS.patch

@@ -0,0 +1,42 @@
+From 0822158912c8e8477b2282ecd6ef406cbf5dcb28 Mon Sep 17 00:00:00 2001
+From: Christian Hopps <[email protected]>
+Date: Sun, 12 Nov 2023 06:28:49 -0500
+Subject: [PATCH ipsec-next v7 01/16] xfrm: config: add CONFIG_XFRM_IPTFS
+
+Add new Kconfig option to enable IP-TFS (RFC9347) functionality.
+
+Signed-off-by: Christian Hopps <[email protected]>
+---
+ net/xfrm/Kconfig | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
+index d7b16f2c23e9..f0157702718f 100644
+--- a/net/xfrm/Kconfig
++++ b/net/xfrm/Kconfig
+@@ -135,6 +135,22 @@ config NET_KEY_MIGRATE
+
+ 	  If unsure, say N.
+
++config XFRM_IPTFS
++	tristate "IPsec IP-TFS/AGGFRAG (RFC 9347) encapsulation support"
++	depends on XFRM
++	help
++	  Information on the IP-TFS/AGGFRAG encapsulation can be found
++	  in RFC 9347. 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.
++
++	  If unsure, say N.
++
+ config XFRM_ESPINTCP
+ 	bool
+
+-- 
+2.46.0
+

patches/v7/v7-0002-include-uapi-add-ip_tfs_-_hdr-packet-formats.patch

@@ -0,0 +1,43 @@
+From 8cba80905abbe7af6ca00618afcd13b3c13a91af Mon Sep 17 00:00:00 2001
+From: Christian Hopps <[email protected]>
+Date: Wed, 20 Apr 2022 13:15:20 -0400
+Subject: [PATCH ipsec-next v7 02/16] include: uapi: add ip_tfs_*_hdr packet
+ formats
+
+Add the on-wire basic and congestion-control IP-TFS packet headers.
+
+Signed-off-by: Christian Hopps <[email protected]>
+---
+ include/uapi/linux/ip.h | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+diff --git a/include/uapi/linux/ip.h b/include/uapi/linux/ip.h
+index 283dec7e3645..5bd7ce934d74 100644
+--- a/include/uapi/linux/ip.h
++++ b/include/uapi/linux/ip.h
+@@ -137,6 +137,22 @@ struct ip_beet_phdr {
+ 	__u8 reserved;
+ };
+
++struct ip_iptfs_hdr {
++	__u8 subtype;		/* 0*: basic, 1: CC */
++	__u8 flags;
++	__be16 block_offset;
++};
++
++struct ip_iptfs_cc_hdr {
++	__u8 subtype;		/* 0: basic, 1*: CC */
++	__u8 flags;
++	__be16 block_offset;
++	__be32 loss_rate;
++	__be64 rtt_adelay_xdelay;
++	__be32 tval;
++	__be32 techo;
++};
++
+ /* index values for the variables in ipv4_devconf */
+ enum
+ {
+-- 
+2.46.0
+

patches/v7/v7-0003-include-uapi-add-IPPROTO_AGGFRAG-for-AGGFRAG-in-E.patch

@@ -0,0 +1,29 @@
+From 93deaa06aefbdf1f581f9956c27e3e765671dea3 Mon Sep 17 00:00:00 2001
+From: Christian Hopps <[email protected]>
+Date: Sat, 27 Aug 2022 02:26:52 +0000
+Subject: [PATCH ipsec-next v7 03/16] include: uapi: add IPPROTO_AGGFRAG for
+ AGGFRAG in ESP
+
+Add the RFC assigned IP protocol number for AGGFRAG.
+
+Signed-off-by: Christian Hopps <[email protected]>
+---
+ include/uapi/linux/in.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
+index d358add1611c..268086e85d04 100644
+--- a/include/uapi/linux/in.h
++++ b/include/uapi/linux/in.h
+@@ -79,6 +79,8 @@ enum {
+ #define IPPROTO_MPLS		IPPROTO_MPLS
+   IPPROTO_ETHERNET = 143,	/* Ethernet-within-IPv6 Encapsulation	*/
+ #define IPPROTO_ETHERNET	IPPROTO_ETHERNET
++  IPPROTO_AGGFRAG = 144,	/* AGGFRAG in ESP (RFC 9347)		*/
++#define IPPROTO_AGGFRAG		IPPROTO_AGGFRAG
+   IPPROTO_RAW = 255,		/* Raw IP packets			*/
+ #define IPPROTO_RAW		IPPROTO_RAW
+   IPPROTO_SMC = 256,		/* Shared Memory Communications		*/
+-- 
+2.46.0
+