From: <ehakim@nvidia.com>
To: <netdev@vger.kernel.org>
Cc: <raeds@nvidia.com>, <davem@davemloft.net>, <edumazet@google.com>,
<kuba@kernel.org>, <pabeni@redhat.com>, <sd@queasysnail.net>,
<atenart@kernel.org>, Emeel Hakim <ehakim@nvidia.com>
Subject: [PATCH net-next v7 1/2] macsec: add support for IFLA_MACSEC_OFFLOAD in macsec_changelink
Date: Mon, 9 Jan 2023 10:55:56 +0200 [thread overview]
Message-ID: <20230109085557.10633-2-ehakim@nvidia.com> (raw)
In-Reply-To: <20230109085557.10633-1-ehakim@nvidia.com>
From: Emeel Hakim <ehakim@nvidia.com>
Add support for changing Macsec offload selection through the
netlink layer by implementing the relevant changes in
macsec_changelink.
Since the handling in macsec_changelink is similar to macsec_upd_offload,
update macsec_upd_offload to use a common helper function to avoid
duplication.
Example for setting offload for a macsec device:
ip link set macsec0 type macsec offload mac
Signed-off-by: Emeel Hakim <ehakim@nvidia.com>
---
v6 -> v7: - Dont change rtnl_lock position after commit f3b4a00f0f62 ("net: macsec: fix net device access prior to holding a lock").
v5 -> v6: - Locking issue got fixed in a separate patch so rebase
V4 -> V5: - Fail immediately if macsec ops does not exist
V3 -> V4: - Dont pass whole attributes data to macsec_update_offload, just pass relevant attribute.
- Fix code style.
- Remove macsec_changelink_upd_offload
V2 -> V3: - Split the original patch into 3 patches, the macsec_rtnl_policy related change (separate patch)
to be sent to "net" branch as a fix.
- Change the original patch title to make it clear that it's only adding IFLA_MACSEC_OFFLOAD
to changelink
V1 -> V2: - Add common helper to avoid duplicating code
drivers/net/macsec.c | 111 ++++++++++++++++++++++---------------------
1 file changed, 56 insertions(+), 55 deletions(-)
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index bf8ac7a3ded7..687d4480b7b3 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2583,18 +2583,61 @@ static bool macsec_is_configured(struct macsec_dev *macsec)
return false;
}
-static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
+static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
{
- struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
- enum macsec_offload offload, prev_offload;
- int (*func)(struct macsec_context *ctx);
- struct nlattr **attrs = info->attrs;
- struct net_device *dev;
+ enum macsec_offload prev_offload;
const struct macsec_ops *ops;
struct macsec_context ctx;
struct macsec_dev *macsec;
int ret = 0;
+ macsec = macsec_priv(dev);
+
+ if (macsec->offload == offload)
+ return 0;
+
+ /* Check if the offloading mode is supported by the underlying layers */
+ if (offload != MACSEC_OFFLOAD_OFF &&
+ !macsec_check_offload(offload, macsec)) {
+ return -EOPNOTSUPP;
+ }
+
+ /* Check if the net device is busy. */
+ if (netif_running(dev))
+ return -EBUSY;
+
+ /* Check if the device already has rules configured: we do not support
+ * rules migration.
+ */
+ if (macsec_is_configured(macsec))
+ return -EBUSY;
+
+ prev_offload = macsec->offload;
+
+ ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
+ macsec, &ctx);
+ if (!ops)
+ return -EOPNOTSUPP;
+
+ macsec->offload = offload;
+
+ ctx.secy = &macsec->secy;
+ ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx)
+ : macsec_offload(ops->mdo_add_secy, &ctx);
+ if (ret)
+ macsec->offload = prev_offload;
+
+ return ret;
+}
+
+static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
+ struct nlattr **attrs = info->attrs;
+ enum macsec_offload offload;
+ struct net_device *dev;
+ int ret;
+
if (!attrs[MACSEC_ATTR_IFINDEX])
return -EINVAL;
@@ -2613,7 +2656,6 @@ static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
ret = PTR_ERR(dev);
goto out;
}
- macsec = macsec_priv(dev);
if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
ret = -EINVAL;
@@ -2621,55 +2663,8 @@ static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
}
offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
- if (macsec->offload == offload)
- goto out;
- /* Check if the offloading mode is supported by the underlying layers */
- if (offload != MACSEC_OFFLOAD_OFF &&
- !macsec_check_offload(offload, macsec)) {
- ret = -EOPNOTSUPP;
- goto out;
- }
-
- /* Check if the net device is busy. */
- if (netif_running(dev)) {
- ret = -EBUSY;
- goto out;
- }
-
- prev_offload = macsec->offload;
- macsec->offload = offload;
-
- /* Check if the device already has rules configured: we do not support
- * rules migration.
- */
- if (macsec_is_configured(macsec)) {
- ret = -EBUSY;
- goto rollback;
- }
-
- ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
- macsec, &ctx);
- if (!ops) {
- ret = -EOPNOTSUPP;
- goto rollback;
- }
-
- if (prev_offload == MACSEC_OFFLOAD_OFF)
- func = ops->mdo_add_secy;
- else
- func = ops->mdo_del_secy;
-
- ctx.secy = &macsec->secy;
- ret = macsec_offload(func, &ctx);
- if (ret)
- goto rollback;
-
- rtnl_unlock();
- return 0;
-
-rollback:
- macsec->offload = prev_offload;
+ ret = macsec_update_offload(dev, offload);
out:
rtnl_unlock();
return ret;
@@ -3840,6 +3835,12 @@ static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
if (ret)
goto cleanup;
+ if (data[IFLA_MACSEC_OFFLOAD]) {
+ ret = macsec_update_offload(dev, nla_get_u8(data[IFLA_MACSEC_OFFLOAD]));
+ if (ret)
+ goto cleanup;
+ }
+
/* If h/w offloading is available, propagate to the device */
if (macsec_is_offloaded(macsec)) {
const struct macsec_ops *ops;
--
2.21.3
next prev parent reply other threads:[~2023-01-09 9:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 8:55 [PATCH net-next v7 0/2] Add support to offload macsec using netlink update ehakim
2023-01-09 8:55 ` ehakim [this message]
2023-01-09 15:14 ` [PATCH net-next v7 1/2] macsec: add support for IFLA_MACSEC_OFFLOAD in macsec_changelink Sabrina Dubroca
2023-01-10 8:43 ` Antoine Tenart
2023-01-10 9:05 ` Emeel Hakim
[not found] ` <167334656781.17820.3219445403317381657@kwain.local>
2023-01-10 11:46 ` Sabrina Dubroca
2023-01-10 10:44 ` Sabrina Dubroca
2023-01-10 13:55 ` Antoine Tenart
2023-01-10 16:16 ` Emeel Hakim
2023-01-09 8:55 ` [PATCH net-next v7 2/2] macsec: dump IFLA_MACSEC_OFFLOAD attribute as part of macsec dump ehakim
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