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net: macsec: add nla support for changing the offloading selection

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MACsec offloading to underlying hardware devices is disabled by default
(the software implementation is used). This patch adds support for
changing this setting through the MACsec netlink interface. Many checks
are done when enabling offloading on a given MACsec interface as there
are limitations (it must be supported by the hardware, only a single
interface can be offloaded on a given physical device at a time, rules
can't be moved for now).

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Antoine Tenart
2020-01-13 23:31:44 +01:00
committed by David S. Miller
parent 3cf3227a21
commit dcb780fb27
2 changed files with 153 additions and 3 deletions
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11
include/uapi/linux/if_macsec.h
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@@ -45,6 +45,7 @@ enum macsec_attrs {
MACSEC_ATTR_RXSC_LIST, /* dump, nested, macsec_rxsc_attrs for each RXSC */
MACSEC_ATTR_TXSC_STATS, /* dump, nested, macsec_txsc_stats_attr */
MACSEC_ATTR_SECY_STATS, /* dump, nested, macsec_secy_stats_attr */
MACSEC_ATTR_OFFLOAD, /* config, nested, macsec_offload_attrs */
__MACSEC_ATTR_END,
NUM_MACSEC_ATTR = __MACSEC_ATTR_END,
MACSEC_ATTR_MAX = __MACSEC_ATTR_END - 1,
@@ -97,6 +98,15 @@ enum macsec_sa_attrs {
MACSEC_SA_ATTR_MAX = __MACSEC_SA_ATTR_END - 1,
};
enum macsec_offload_attrs {
MACSEC_OFFLOAD_ATTR_UNSPEC,
MACSEC_OFFLOAD_ATTR_TYPE, /* config/dump, u8 0..2 */
MACSEC_OFFLOAD_ATTR_PAD,
__MACSEC_OFFLOAD_ATTR_END,
NUM_MACSEC_OFFLOAD_ATTR = __MACSEC_OFFLOAD_ATTR_END,
MACSEC_OFFLOAD_ATTR_MAX = __MACSEC_OFFLOAD_ATTR_END - 1,
};
enum macsec_nl_commands {
MACSEC_CMD_GET_TXSC,
MACSEC_CMD_ADD_RXSC,
@@ -108,6 +118,7 @@ enum macsec_nl_commands {
MACSEC_CMD_ADD_RXSA,
MACSEC_CMD_DEL_RXSA,
MACSEC_CMD_UPD_RXSA,
MACSEC_CMD_UPD_OFFLOAD,
};
/* u64 per-RXSC stats */