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-rw-r--r--include/net/dcbnl.h8
-rw-r--r--include/uapi/linux/dcbnl.h2
-rw-r--r--net/dcb/dcbnl.c113
3 files changed, 122 insertions, 1 deletions
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index 8841ab6c2de7..fe7dfb8bcb5b 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -19,6 +19,10 @@ struct dcb_app_type {
u8 dcbx;
};
+u16 dcb_getrewr(struct net_device *dev, struct dcb_app *app);
+int dcb_setrewr(struct net_device *dev, struct dcb_app *app);
+int dcb_delrewr(struct net_device *dev, struct dcb_app *app);
+
int dcb_setapp(struct net_device *, struct dcb_app *);
u8 dcb_getapp(struct net_device *, struct dcb_app *);
int dcb_ieee_setapp(struct net_device *, struct dcb_app *);
@@ -113,6 +117,10 @@ struct dcbnl_rtnl_ops {
/* apptrust */
int (*dcbnl_setapptrust)(struct net_device *, u8 *, int);
int (*dcbnl_getapptrust)(struct net_device *, u8 *, int *);
+
+ /* rewrite */
+ int (*dcbnl_setrewr)(struct net_device *dev, struct dcb_app *app);
+ int (*dcbnl_delrewr)(struct net_device *dev, struct dcb_app *app);
};
#endif /* __NET_DCBNL_H__ */
diff --git a/include/uapi/linux/dcbnl.h b/include/uapi/linux/dcbnl.h
index 99047223ab26..7e15214aa5dd 100644
--- a/include/uapi/linux/dcbnl.h
+++ b/include/uapi/linux/dcbnl.h
@@ -411,6 +411,7 @@ enum dcbnl_attrs {
* @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
+ * @DCB_ATTR_DCB_REWR_TABLE: rewrite configuration
*/
enum ieee_attrs {
DCB_ATTR_IEEE_UNSPEC,
@@ -425,6 +426,7 @@ enum ieee_attrs {
DCB_ATTR_IEEE_QCN_STATS,
DCB_ATTR_DCB_BUFFER,
DCB_ATTR_DCB_APP_TRUST_TABLE,
+ DCB_ATTR_DCB_REWR_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 cb5319c6afe6..2ca7fffcf069 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -178,6 +178,7 @@ static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
};
static LIST_HEAD(dcb_app_list);
+static LIST_HEAD(dcb_rewr_list);
static DEFINE_SPINLOCK(dcb_lock);
static enum ieee_attrs_app dcbnl_app_attr_type_get(u8 selector)
@@ -1138,7 +1139,7 @@ static int dcbnl_app_table_setdel(struct nlattr *attr,
static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
{
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
- struct nlattr *ieee, *app;
+ struct nlattr *ieee, *app, *rewr;
struct dcb_app_type *itr;
int dcbx;
int err;
@@ -1241,6 +1242,27 @@ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
spin_unlock_bh(&dcb_lock);
nla_nest_end(skb, app);
+ rewr = nla_nest_start(skb, DCB_ATTR_DCB_REWR_TABLE);
+ if (!rewr)
+ return -EMSGSIZE;
+
+ spin_lock_bh(&dcb_lock);
+ list_for_each_entry(itr, &dcb_rewr_list, list) {
+ if (itr->ifindex == netdev->ifindex) {
+ enum ieee_attrs_app type =
+ dcbnl_app_attr_type_get(itr->app.selector);
+ err = nla_put(skb, type, sizeof(itr->app), &itr->app);
+ if (err) {
+ spin_unlock_bh(&dcb_lock);
+ nla_nest_cancel(skb, rewr);
+ return -EMSGSIZE;
+ }
+ }
+ }
+
+ spin_unlock_bh(&dcb_lock);
+ nla_nest_end(skb, rewr);
+
if (ops->dcbnl_getapptrust) {
err = dcbnl_getapptrust(netdev, skb);
if (err)
@@ -1602,6 +1624,14 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
goto err;
}
+ if (ieee[DCB_ATTR_DCB_REWR_TABLE]) {
+ err = dcbnl_app_table_setdel(ieee[DCB_ATTR_DCB_REWR_TABLE],
+ netdev,
+ ops->dcbnl_setrewr ?: dcb_setrewr);
+ if (err)
+ goto err;
+ }
+
if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
err = dcbnl_app_table_setdel(ieee[DCB_ATTR_IEEE_APP_TABLE],
netdev, ops->ieee_setapp ?:
@@ -1701,6 +1731,14 @@ static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
goto err;
}
+ if (ieee[DCB_ATTR_DCB_REWR_TABLE]) {
+ err = dcbnl_app_table_setdel(ieee[DCB_ATTR_DCB_REWR_TABLE],
+ netdev,
+ ops->dcbnl_delrewr ?: dcb_delrewr);
+ if (err)
+ goto err;
+ }
+
err:
err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
@@ -1929,6 +1967,22 @@ out:
return ret;
}
+static struct dcb_app_type *dcb_rewr_lookup(const struct dcb_app *app,
+ int ifindex, int proto)
+{
+ struct dcb_app_type *itr;
+
+ list_for_each_entry(itr, &dcb_rewr_list, list) {
+ if (itr->app.selector == app->selector &&
+ itr->app.priority == app->priority &&
+ itr->ifindex == ifindex &&
+ ((proto == -1) || itr->app.protocol == proto))
+ return itr;
+ }
+
+ return NULL;
+}
+
static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
int ifindex, int prio)
{
@@ -2052,6 +2106,63 @@ u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
}
EXPORT_SYMBOL(dcb_ieee_getapp_mask);
+/* Get protocol value from rewrite entry. */
+u16 dcb_getrewr(struct net_device *dev, struct dcb_app *app)
+{
+ struct dcb_app_type *itr;
+ u16 proto = 0;
+
+ spin_lock_bh(&dcb_lock);
+ itr = dcb_rewr_lookup(app, dev->ifindex, -1);
+ if (itr)
+ proto = itr->app.protocol;
+ spin_unlock_bh(&dcb_lock);
+
+ return proto;
+}
+EXPORT_SYMBOL(dcb_getrewr);
+
+ /* Add rewrite entry to the rewrite list. */
+int dcb_setrewr(struct net_device *dev, struct dcb_app *new)
+{
+ int err;
+
+ spin_lock_bh(&dcb_lock);
+ /* Search for existing match and abort if found. */
+ if (dcb_rewr_lookup(new, dev->ifindex, new->protocol)) {
+ err = -EEXIST;
+ goto out;
+ }
+
+ err = dcb_app_add(&dcb_rewr_list, new, dev->ifindex);
+out:
+ spin_unlock_bh(&dcb_lock);
+
+ return err;
+}
+EXPORT_SYMBOL(dcb_setrewr);
+
+/* Delete rewrite entry from the rewrite list. */
+int dcb_delrewr(struct net_device *dev, struct dcb_app *del)
+{
+ struct dcb_app_type *itr;
+ int err = -ENOENT;
+
+ spin_lock_bh(&dcb_lock);
+ /* Search for existing match and remove it. */
+ itr = dcb_rewr_lookup(del, dev->ifindex, del->protocol);
+ if (itr) {
+ list_del(&itr->list);
+ kfree(itr);
+ err = 0;
+ }
+
+ spin_unlock_bh(&dcb_lock);
+
+ return err;
+}
+EXPORT_SYMBOL(dcb_delrewr);
+
/**
* dcb_ieee_setapp - add IEEE dcb application data to app list
* @dev: network interface
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-15 13:01:15 +0000