diff options
| author |   Lior Nahmanson <liorna@nvidia.com> | 2022-09-05 22:21:13 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-09-07 14:02:08 +0100 |
| commit | 0a28bfd4971fd570d1f3e4653b21415becefc92c (patch) | |
| tree | db9ef7de56c8de64dcbf441f7f3f359d0854261a /drivers/net/macsec.c | |
| parent | Merge branch 'netlink-be-policy' (diff) | |
| download | linux-dev-0a28bfd4971fd570d1f3e4653b21415becefc92c.tar.xz linux-dev-0a28bfd4971fd570d1f3e4653b21415becefc92c.zip | |
net/macsec: Add MACsec skb_metadata_dst Tx Data path support
In the current MACsec offload implementation, MACsec interfaces shares
the same MAC address by default.
Therefore, HW can't distinguish from which MACsec interface the traffic
originated from.
MACsec stack will use skb_metadata_dst to store the SCI value, which is
unique per Macsec interface, skb_metadat_dst will be used by the
offloading device driver to associate the SKB with the corresponding
offloaded interface (SCI).
Signed-off-by: Lior Nahmanson <liorna@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macsec.c')
| -rw-r--r-- | drivers/net/macsec.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index adf448a8162b..c190dc019717 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -18,6 +18,7 @@ #include <net/sock.h> #include <net/gro_cells.h> #include <net/macsec.h> +#include <net/dst_metadata.h> #include <linux/phy.h> #include <linux/byteorder/generic.h> #include <linux/if_arp.h> @@ -3416,6 +3417,11 @@ static netdev_tx_t macsec_start_xmit(struct sk_buff *skb, int ret, len; if (macsec_is_offloaded(netdev_priv(dev))) { + struct metadata_dst *md_dst = secy->tx_sc.md_dst; + + skb_dst_drop(skb); + dst_hold(&md_dst->dst); + skb_dst_set(skb, &md_dst->dst); skb->dev = macsec->real_dev; return dev_queue_xmit(skb); } @@ -3743,6 +3749,7 @@ static void macsec_free_netdev(struct net_device *dev) { struct macsec_dev *macsec = macsec_priv(dev); + metadata_dst_free(macsec->secy.tx_sc.md_dst); free_percpu(macsec->stats); free_percpu(macsec->secy.tx_sc.stats); @@ -4015,6 +4022,13 @@ static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) return -ENOMEM; } + secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL); + if (!secy->tx_sc.md_dst) { + free_percpu(secy->tx_sc.stats); + free_percpu(macsec->stats); + return -ENOMEM; + } + if (sci == MACSEC_UNDEF_SCI) sci = dev_to_sci(dev, MACSEC_PORT_ES); @@ -4028,6 +4042,7 @@ static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len) secy->xpn = DEFAULT_XPN; secy->sci = sci; + secy->tx_sc.md_dst->u.macsec_info.sci = sci; secy->tx_sc.active = true; secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA; secy->tx_sc.encrypt = DEFAULT_ENCRYPT; |