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authorDaniel Machon <daniel.machon@microchip.com>2022-11-01 10:48:30 +0100
committerPaolo Abeni <pabeni@redhat.com>2022-11-03 15:16:50 +0100
commit6182d5875c330a5a611687caa05f47752455720c (patch)
tree200bfab66f2b8838990cd27bc523b979deb3753b
parentec32c0c42d0a7208571c4c77f140bffaa4e5e304 (diff)
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net: dcb: add new apptrust attribute
Add new apptrust extension attributes to the 8021Qaz APP managed object. Two new attributes, DCB_ATTR_DCB_APP_TRUST_TABLE and DCB_ATTR_DCB_APP_TRUST, has been added. Trusted selectors are passed in the nested attribute DCB_ATTR_DCB_APP_TRUST, in order of precedence. The new attributes are meant to allow drivers, whose hw supports the notion of trust, to be able to set whether a particular app selector is trusted - and in which order. Signed-off-by: Daniel Machon <daniel.machon@microchip.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-rw-r--r--include/net/dcbnl.h4
-rw-r--r--include/uapi/linux/dcbnl.h2
-rw-r--r--net/dcb/dcbnl.c76
3 files changed, 80 insertions, 2 deletions
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index 2b2d86fb3131..8841ab6c2de7 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -109,6 +109,10 @@ struct dcbnl_rtnl_ops {
/* buffer settings */
int (*dcbnl_getbuffer)(struct net_device *, struct dcbnl_buffer *);
int (*dcbnl_setbuffer)(struct net_device *, struct dcbnl_buffer *);
+
+ /* apptrust */
+ int (*dcbnl_setapptrust)(struct net_device *, u8 *, int);
+ int (*dcbnl_getapptrust)(struct net_device *, u8 *, int *);
};
#endif /* __NET_DCBNL_H__ */
diff --git a/include/uapi/linux/dcbnl.h b/include/uapi/linux/dcbnl.h
index dc7ef96207ca..99047223ab26 100644
--- a/include/uapi/linux/dcbnl.h
+++ b/include/uapi/linux/dcbnl.h
@@ -410,6 +410,7 @@ enum dcbnl_attrs {
* @DCB_ATTR_IEEE_PEER_ETS: peer ETS configuration - get only
* @DCB_ATTR_IEEE_PEER_PFC: peer PFC configuration - get only
* @DCB_ATTR_IEEE_PEER_APP: peer APP tlv - get only
+ * @DCB_ATTR_DCB_APP_TRUST_TABLE: selector trust table
*/
enum ieee_attrs {
DCB_ATTR_IEEE_UNSPEC,
@@ -423,6 +424,7 @@ enum ieee_attrs {
DCB_ATTR_IEEE_QCN,
DCB_ATTR_IEEE_QCN_STATS,
DCB_ATTR_DCB_BUFFER,
+ DCB_ATTR_DCB_APP_TRUST_TABLE,
__DCB_ATTR_IEEE_MAX
};
#define DCB_ATTR_IEEE_MAX (__DCB_ATTR_IEEE_MAX - 1)
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 0c17bb28ae60..cec0632f96db 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -166,6 +166,7 @@ static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
[DCB_ATTR_IEEE_QCN] = {.len = sizeof(struct ieee_qcn)},
[DCB_ATTR_IEEE_QCN_STATS] = {.len = sizeof(struct ieee_qcn_stats)},
[DCB_ATTR_DCB_BUFFER] = {.len = sizeof(struct dcbnl_buffer)},
+ [DCB_ATTR_DCB_APP_TRUST_TABLE] = {.type = NLA_NESTED},
};
/* DCB number of traffic classes nested attributes. */
@@ -1062,9 +1063,9 @@ nla_put_failure:
/* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
{
- struct nlattr *ieee, *app;
- struct dcb_app_type *itr;
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
+ struct nlattr *ieee, *app, *apptrust;
+ struct dcb_app_type *itr;
int dcbx;
int err;
@@ -1166,6 +1167,30 @@ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
spin_unlock_bh(&dcb_lock);
nla_nest_end(skb, app);
+ if (ops->dcbnl_getapptrust) {
+ u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0};
+ int nselectors, i;
+
+ apptrust = nla_nest_start(skb, DCB_ATTR_DCB_APP_TRUST_TABLE);
+ if (!apptrust)
+ return -EMSGSIZE;
+
+ err = ops->dcbnl_getapptrust(netdev, selectors, &nselectors);
+ if (!err) {
+ for (i = 0; i < nselectors; i++) {
+ enum ieee_attrs_app type =
+ dcbnl_app_attr_type_get(selectors[i]);
+ err = nla_put_u8(skb, type, selectors[i]);
+ if (err) {
+ nla_nest_cancel(skb, apptrust);
+ return err;
+ }
+ }
+ }
+
+ nla_nest_end(skb, apptrust);
+ }
+
/* get peer info if available */
if (ops->ieee_peer_getets) {
struct ieee_ets ets;
@@ -1554,6 +1579,53 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
}
}
+ if (ieee[DCB_ATTR_DCB_APP_TRUST_TABLE]) {
+ u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0};
+ struct nlattr *attr;
+ int nselectors = 0;
+ int rem;
+
+ if (!ops->dcbnl_setapptrust) {
+ err = -EOPNOTSUPP;
+ goto err;
+ }
+
+ nla_for_each_nested(attr, ieee[DCB_ATTR_DCB_APP_TRUST_TABLE],
+ rem) {
+ enum ieee_attrs_app type = nla_type(attr);
+ u8 selector;
+ int i;
+
+ if (!dcbnl_app_attr_type_validate(type) ||
+ nla_len(attr) != 1 ||
+ nselectors >= sizeof(selectors)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ selector = nla_get_u8(attr);
+
+ if (!dcbnl_app_selector_validate(type, selector)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ /* Duplicate selector ? */
+ for (i = 0; i < nselectors; i++) {
+ if (selectors[i] == selector) {
+ err = -EINVAL;
+ goto err;
+ }
+ }
+
+ selectors[nselectors++] = selector;
+ }
+
+ err = ops->dcbnl_setapptrust(netdev, selectors, nselectors);
+ if (err)
+ goto err;
+ }
+
err:
err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);