diff mbox series

[RFC,xfrm-next,v3,1/8] xfrm: add new full offload flag

Message ID c8a9971e879f7b7cc0550f2e7c0362223ed6e119.1662295929.git.leonro@nvidia.com (mailing list archive)
State RFC
Delegated to: Netdev Maintainers
Headers show
Series Extend XFRM core to allow full offload configuration | expand

Checks

Context Check Description
netdev/tree_selection success Guessed tree name to be net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 4610 this patch: 4610
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 1117 this patch: 1117
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4768 this patch: 4768
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 54 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Leon Romanovsky Sept. 4, 2022, 1:15 p.m. UTC 
From: Leon Romanovsky <leonro@nvidia.com>

In the next patches, the xfrm core code will be extended to support
new type of offload - full offload. In that mode, both policy and state
should be specially configured in order to perform whole offloaded data
path.

Full offload takes care of encryption, decryption, encapsulation and
other operations with headers.

As this mode is new for XFRM policy flow, we can "start fresh" with flag
bits and release first and second bit for future use.

Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 include/net/xfrm.h        | 7 +++++++
 include/uapi/linux/xfrm.h | 6 ++++++
 net/xfrm/xfrm_device.c    | 3 +++
 net/xfrm/xfrm_user.c      | 2 ++
 4 files changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 6e8fa98f786f..b4d487053dfd 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -131,12 +131,19 @@  enum {
 	XFRM_DEV_OFFLOAD_OUT,
 };
 
+enum {
+	XFRM_DEV_OFFLOAD_UNSPECIFIED,
+	XFRM_DEV_OFFLOAD_CRYPTO,
+	XFRM_DEV_OFFLOAD_FULL,
+};
+
 struct xfrm_dev_offload {
 	struct net_device	*dev;
 	netdevice_tracker	dev_tracker;
 	struct net_device	*real_dev;
 	unsigned long		offload_handle;
 	u8			dir : 2;
+	u8			type : 2;
 };
 
 struct xfrm_mode {
diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index 4f84ea7ee14c..463c6c1af23a 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -519,6 +519,12 @@  struct xfrm_user_offload {
  */
 #define XFRM_OFFLOAD_IPV6	1
 #define XFRM_OFFLOAD_INBOUND	2
+/* Two bits above are relevant for state path only, while
+ * offload is used for both policy and state flows.
+ *
+ * In policy offload mode, they are free and can be safely reused.
+ */
+#define XFRM_OFFLOAD_FULL	4
 
 struct xfrm_userpolicy_default {
 #define XFRM_USERPOLICY_UNSPEC	0
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 637ca8838436..6d1124eb1ec8 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -270,12 +270,15 @@  int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 	else
 		xso->dir = XFRM_DEV_OFFLOAD_OUT;
 
+	xso->type = XFRM_DEV_OFFLOAD_CRYPTO;
+
 	err = dev->xfrmdev_ops->xdo_dev_state_add(x);
 	if (err) {
 		xso->dev = NULL;
 		xso->dir = 0;
 		xso->real_dev = NULL;
 		netdev_put(dev, &xso->dev_tracker);
+		xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
 
 		if (err != -EOPNOTSUPP)
 			return err;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 2ff017117730..9c0aef815730 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -854,6 +854,8 @@  static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
 	xuo->ifindex = xso->dev->ifindex;
 	if (xso->dir == XFRM_DEV_OFFLOAD_IN)
 		xuo->flags = XFRM_OFFLOAD_INBOUND;
+	if (xso->type == XFRM_DEV_OFFLOAD_FULL)
+		xuo->flags |= XFRM_OFFLOAD_FULL;
 
 	return 0;
 }