From 65efbc9348fb767dd77d2f04418bececadeca71f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benny=20L=C3=B8nstrup=20Ammitzb=C3=B8ll?= <bla@xxxxxxxxxxx>
Date: Fri, 28 Oct 2022 16:47:27 +0200
Subject: [PATCH] Enable MACsec HW offload in driver_macsec_linux if supported.
Signed-off-by: Benny Ammitzboell <benny@xxxxxxxxxxxxxxxxxxxxxx>
---
src/drivers/driver_macsec_linux.c | 63 ++++++++++++++++++++++++++++++-
1 file changed, 62 insertions(+), 1 deletion(-)
diff --git a/src/drivers/driver_macsec_linux.c b/src/drivers/driver_macsec_linux.c
index b609bbf38..21697d6c5 100644
--- a/src/drivers/driver_macsec_linux.c
+++ b/src/drivers/driver_macsec_linux.c
@@ -677,6 +677,46 @@ out_free_msg:
}
+/**
+ * macsec_drv_try_enable_hw_offload - Try to enable hardware offload if possible
+ * @priv: Private driver interface data
+ * Returns: 0 on success, -1 on failure (or if not supported)
+ */
+static int macsec_drv_try_enable_hw_offload(void *priv, enum macsec_offload offl)
+{
+ struct macsec_drv_data *drv = priv;
+ struct macsec_genl_ctx *ctx = &drv->ctx;
+ struct nl_msg *msg;
+ struct nlattr *nest;
+ int ret = -1;
+
+ wpa_printf(MSG_DEBUG, DRV_PREFIX "%s trying offl=%u", __func__, offl);
+
+ msg = msg_prepare(MACSEC_CMD_UPD_OFFLOAD, ctx, drv->ifi);
+ if (!msg)
+ return ret;
+
+ nest = nla_nest_start(msg, MACSEC_ATTR_OFFLOAD);
+ if (!nest)
+ goto nla_put_failure;
+
+ NLA_PUT_U8(msg, MACSEC_OFFLOAD_ATTR_TYPE, offl);
+
+ nla_nest_end(msg, nest);
+
+ ret = nl_send_recv(ctx->sk, msg);
+ if (ret < 0) {
+ wpa_printf(MSG_ERROR,
+ DRV_PREFIX "failed to communicate: %d (%s)",
+ ret, nl_geterror(-ret));
+ }
+
+ nla_put_failure:
+ nlmsg_free(msg);
+ return ret;
+}
+
+
/**
* macsec_drv_get_receive_lowest_pn - Get receive lowest PN
* @priv: Private driver interface data
@@ -1180,7 +1220,28 @@ static int macsec_drv_create_transmit_sc(
/* In case some settings have already been done but we couldn't apply
* them. */
- return try_commit(drv);
+ err = try_commit(drv);
+ if (err)
+ return err;
+
+ /* Try to enable MACsec hardware offloading */
+ err = macsec_drv_try_enable_hw_offload(drv, MACSEC_OFFLOAD_MAC);
+ if (err) {
+ err = macsec_drv_try_enable_hw_offload(drv, MACSEC_OFFLOAD_PHY);
+ if (err) {
+ wpa_printf(MSG_INFO, DRV_PREFIX
+ "%s: MACSEC_OFFLOAD_OFF",
+ drv->common.ifname);
+ } else {
+ wpa_printf(MSG_INFO, DRV_PREFIX
+ "%s: MACSEC_OFFLOAD_PHY",
+ drv->common.ifname);
+ }
+ } else {
+ wpa_printf(MSG_INFO, DRV_PREFIX
+ "%s: MACSEC_OFFLOAD_MAC",
+ drv->common.ifname);
+ }
}
--
2.37.4
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