dcb: Add ieee_dcb_delapp() and dcb op to delete app entry

Now that we allow multiple IEEE App entries we need a way
to remove specific entries. To do this add the ieee_dcb_delapp()
routine.

Additionaly drivers may need to remove the APP entry from
their firmware tables. Add dcb ops routine to handle this.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/dcbnl.h b/include/linux/dcbnl.h
index c522800..66a6723 100644 (file)
--- a/include/linux/dcbnl.h
+++ b/include/linux/dcbnl.h
@@ -203,6 +203,7 @@ struct dcbmsg {
  * @DCB_CMD_GFEATCFG: get DCBX features flags
  * @DCB_CMD_SFEATCFG: set DCBX features negotiation flags
  * @DCB_CMD_CEE_GET: get CEE aggregated configuration
+ * @DCB_CMD_IEEE_DEL: delete IEEE 802.1Qaz configuration
  */
 enum dcbnl_commands {
        DCB_CMD_UNDEFINED,
@@ -246,6 +247,7 @@ enum dcbnl_commands {
        DCB_CMD_SFEATCFG,
 
        DCB_CMD_CEE_GET,
+       DCB_CMD_IEEE_DEL,
 
        __DCB_CMD_ENUM_MAX,
        DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,

diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index c53a4e0..62a2685 100644 (file)
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -31,6 +31,7 @@ struct dcb_app_type {
 u8 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 *);
+int dcb_ieee_delapp(struct net_device *, struct dcb_app *);
 
 int dcbnl_notify(struct net_device *dev, int event, int cmd, u32 seq, u32 pid);
 
@@ -46,6 +47,7 @@ struct dcbnl_rtnl_ops {
        int (*ieee_setpfc) (struct net_device *, struct ieee_pfc *);
        int (*ieee_getapp) (struct net_device *, struct dcb_app *);
        int (*ieee_setapp) (struct net_device *, struct dcb_app *);
+       int (*ieee_delapp) (struct net_device *, struct dcb_app *);
        int (*ieee_peer_getets) (struct net_device *, struct ieee_ets *);
        int (*ieee_peer_getpfc) (struct net_device *, struct ieee_pfc *);
 

diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 3e3b51c..196084f 100644 (file)
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1451,6 +1451,52 @@ static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
 
        return err;
 }
+
+static int dcbnl_ieee_del(struct net_device *netdev, struct nlattr **tb,
+                         u32 pid, u32 seq, u16 flags)
+{
+       const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
+       struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
+       int err = -EOPNOTSUPP;
+
+       if (!ops)
+               return -EOPNOTSUPP;
+
+       if (!tb[DCB_ATTR_IEEE])
+               return -EINVAL;
+
+       err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
+                              tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
+       if (err)
+               return err;
+
+       if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
+               struct nlattr *attr;
+               int rem;
+
+               nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
+                       struct dcb_app *app_data;
+
+                       if (nla_type(attr) != DCB_ATTR_IEEE_APP)
+                               continue;
+                       app_data = nla_data(attr);
+                       if (ops->ieee_delapp)
+                               err = ops->ieee_delapp(netdev, app_data);
+                       else
+                               err = dcb_ieee_delapp(netdev, app_data);
+                       if (err)
+                               goto err;
+               }
+       }
+
+err:
+       dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_DEL, DCB_ATTR_IEEE,
+                   pid, seq, flags);
+       dcbnl_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
+       return err;
+}
+
+
 /* DCBX configuration */
 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
                         u32 pid, u32 seq, u16 flags)
@@ -1765,11 +1811,15 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
                goto out;
        case DCB_CMD_IEEE_SET:
                ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
-                                nlh->nlmsg_flags);
+                                    nlh->nlmsg_flags);
                goto out;
        case DCB_CMD_IEEE_GET:
                ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
-                                nlh->nlmsg_flags);
+                                    nlh->nlmsg_flags);
+               goto out;
+       case DCB_CMD_IEEE_DEL:
+               ret = dcbnl_ieee_del(netdev, tb, pid, nlh->nlmsg_seq,
+                                    nlh->nlmsg_flags);
                goto out;
        case DCB_CMD_GDCBX:
                ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
@@ -1924,6 +1974,42 @@ out:
 }
 EXPORT_SYMBOL(dcb_ieee_setapp);
 
+/**
+ * dcb_ieee_delapp - delete IEEE dcb application data from list
+ *
+ * This removes a matching APP data from the APP list
+ */
+int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
+{
+       struct dcb_app_type *itr;
+       struct dcb_app_type event;
+       int err = -ENOENT;
+
+       memcpy(&event.name, dev->name, sizeof(event.name));
+       memcpy(&event.app, del, sizeof(event.app));
+
+       spin_lock(&dcb_lock);
+       /* Search for existing match and remove it. */
+       list_for_each_entry(itr, &dcb_app_list, list) {
+               if (itr->app.selector == del->selector &&
+                   itr->app.protocol == del->protocol &&
+                   itr->app.priority == del->priority &&
+                   (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
+                       list_del(&itr->list);
+                       kfree(itr);
+                       err = 0;
+                       goto out;
+               }
+       }
+
+out:
+       spin_unlock(&dcb_lock);
+       if (!err)
+               call_dcbevent_notifiers(DCB_APP_EVENT, &event);
+       return err;
+}
+EXPORT_SYMBOL(dcb_ieee_delapp);
+
 static void dcb_flushapp(void)
 {
        struct dcb_app_type *app;