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 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, 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