3 files changed, 169 insertions, 0 deletions

diff --git a/include/linux/dcbnl.h b/include/linux/dcbnl.h
index 16eea36d8934..68cd248f6d3e 100644
--- a/include/linux/dcbnl.h
+++ b/include/linux/dcbnl.h
@@ -137,6 +137,8 @@ struct dcbmsg {
  * @DCB_CMD_IEEE_GET: get IEEE 802.1Qaz configuration
  * @DCB_CMD_GDCBX: get DCBX engine configuration
  * @DCB_CMD_SDCBX: set DCBX engine configuration
+ * @DCB_CMD_GFEATCFG: get DCBX features flags
+ * @DCB_CMD_SFEATCFG: set DCBX features negotiation flags
  */
 enum dcbnl_commands {
         DCB_CMD_UNDEFINED,
@@ -176,6 +178,9 @@ enum dcbnl_commands {
         DCB_CMD_GDCBX,
         DCB_CMD_SDCBX,
 
+        DCB_CMD_GFEATCFG,
+        DCB_CMD_SFEATCFG,
+
         __DCB_CMD_ENUM_MAX,
         DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
 };
@@ -197,6 +202,7 @@ enum dcbnl_commands {
  * @DCB_ATTR_BCN: backward congestion notification configuration (NLA_NESTED)
  * @DCB_ATTR_IEEE: IEEE 802.1Qaz supported attributes (NLA_NESTED)
  * @DCB_ATTR_DCBX: DCBX engine configuration in the device (NLA_U8)
+ * @DCB_ATTR_FEATCFG: DCBX features flags (NLA_NESTED)
  */
 enum dcbnl_attrs {
         DCB_ATTR_UNDEFINED,
@@ -218,6 +224,7 @@ enum dcbnl_attrs {
         DCB_ATTR_IEEE,
 
         DCB_ATTR_DCBX,
+        DCB_ATTR_FEATCFG,
 
         __DCB_ATTR_ENUM_MAX,
         DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
@@ -506,4 +513,30 @@ enum dcbnl_app_attrs {
         DCB_APP_ATTR_MAX = __DCB_APP_ATTR_ENUM_MAX - 1,
 };
 
+/**
+ * enum dcbnl_featcfg_attrs - features conifiguration flags
+ *
+ * @DCB_FEATCFG_ATTR_UNDEFINED: unspecified attribute to catch errors
+ * @DCB_FEATCFG_ATTR_ALL: (NLA_FLAG) all features configuration attributes
+ * @DCB_FEATCFG_ATTR_PG: (NLA_U8) configuration flags for priority groups
+ * @DCB_FEATCFG_ATTR_PFC: (NLA_U8) configuration flags for priority
+ *                                 flow control
+ * @DCB_FEATCFG_ATTR_APP: (NLA_U8) configuration flags for application TLV
+ *
+ */
+#define DCB_FEATCFG_ERROR       0x01    /* error in feature resolution */
+#define DCB_FEATCFG_ENABLE      0x02    /* enable feature */
+#define DCB_FEATCFG_WILLING     0x04    /* feature is willing */
+#define DCB_FEATCFG_ADVERTISE   0x08    /* advertise feature */
+enum dcbnl_featcfg_attrs {
+        DCB_FEATCFG_ATTR_UNDEFINED,
+        DCB_FEATCFG_ATTR_ALL,
+        DCB_FEATCFG_ATTR_PG,
+        DCB_FEATCFG_ATTR_PFC,
+        DCB_FEATCFG_ATTR_APP,
+
+        __DCB_FEATCFG_ATTR_ENUM_MAX,
+        DCB_FEATCFG_ATTR_MAX = __DCB_FEATCFG_ATTR_ENUM_MAX - 1,
+};
+
 #endif /* __LINUX_DCBNL_H__ */
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index c65347b3cbbf..a8e7852b10ab 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -70,11 +70,14 @@ struct dcbnl_rtnl_ops {
         void (*setbcnrp)(struct net_device *, int, u8);
         u8   (*setapp)(struct net_device *, u8, u16, u8);
         u8   (*getapp)(struct net_device *, u8, u16);
+        u8   (*getfeatcfg)(struct net_device *, int, u8 *);
+        u8   (*setfeatcfg)(struct net_device *, int, u8);
 
         /* DCBX configuration */
         u8   (*getdcbx)(struct net_device *);
         u8   (*setdcbx)(struct net_device *, u8);
 
+
 };
 
 #endif /* __NET_DCBNL_H__ */
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 8f83ad859d9b..075af0a08d84 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -69,6 +69,7 @@ static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
+        [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
 };
 
 /* DCB priority flow control to User Priority nested attributes */
@@ -182,6 +183,14 @@ static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
 };
 
+/* DCB number of traffic classes nested attributes. */
+static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
+        [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
+        [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
+        [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
+        [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
+};
+
 static LIST_HEAD(dcb_app_list);
 static DEFINE_SPINLOCK(dcb_lock);
 
@@ -1306,6 +1315,122 @@ static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
         return ret;
 }
 
+static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
+                            u32 pid, u32 seq, u16 flags)
+{
+        struct sk_buff *dcbnl_skb;
+        struct nlmsghdr *nlh;
+        struct dcbmsg *dcb;
+        struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
+        u8 value;
+        int ret = -EINVAL;
+        int i;
+        int getall = 0;
+
+        if (!tb[DCB_ATTR_FEATCFG] || !netdev->dcbnl_ops->getfeatcfg)
+                return ret;
+
+        ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
+                               dcbnl_featcfg_nest);
+        if (ret) {
+                ret = -EINVAL;
+                goto err_out;
+        }
+
+        dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+        if (!dcbnl_skb) {
+                ret = -EINVAL;
+                goto err_out;
+        }
+
+        nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
+
+        dcb = NLMSG_DATA(nlh);
+        dcb->dcb_family = AF_UNSPEC;
+        dcb->cmd = DCB_CMD_GFEATCFG;
+
+        nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
+        if (!nest) {
+                ret = -EINVAL;
+                goto err;
+        }
+
+        if (data[DCB_FEATCFG_ATTR_ALL])
+                getall = 1;
+
+        for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
+                if (!getall && !data[i])
+                        continue;
+
+                ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
+                if (!ret) {
+                        ret = nla_put_u8(dcbnl_skb, i, value);
+
+                        if (ret) {
+                                nla_nest_cancel(dcbnl_skb, nest);
+                                ret = -EINVAL;
+                                goto err;
+                        }
+                } else
+                        goto err;
+        }
+        nla_nest_end(dcbnl_skb, nest);
+
+        nlmsg_end(dcbnl_skb, nlh);
+
+        ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
+        if (ret) {
+                ret = -EINVAL;
+                goto err_out;
+        }
+
+        return 0;
+nlmsg_failure:
+err:
+        kfree_skb(dcbnl_skb);
+err_out:
+        return ret;
+}
+
+static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
+                            u32 pid, u32 seq, u16 flags)
+{
+        struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
+        int ret = -EINVAL;
+        u8 value;
+        int i;
+
+        if (!tb[DCB_ATTR_FEATCFG] || !netdev->dcbnl_ops->setfeatcfg)
+                return ret;
+
+        ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
+                               dcbnl_featcfg_nest);
+
+        if (ret) {
+                ret = -EINVAL;
+                goto err;
+        }
+
+        for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
+                if (data[i] == NULL)
+                        continue;
+
+                value = nla_get_u8(data[i]);
+
+                ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
+
+                if (ret)
+                        goto operr;
+        }
+
+operr:
+        ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SFEATCFG,
+                          DCB_ATTR_FEATCFG, pid, seq, flags);
+
+err:
+        return ret;
+}
+
 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
         struct net *net = sock_net(skb->sk);
@@ -1427,6 +1552,14 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
                 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
                                     nlh->nlmsg_flags);
                 goto out;
+        case DCB_CMD_GFEATCFG:
+                ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
+                                       nlh->nlmsg_flags);
+                goto out;
+        case DCB_CMD_SFEATCFG:
+                ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
+                                       nlh->nlmsg_flags);
+                goto out;
         default:
                 goto errout;
         }