dcbnl: more informed return values for new dcbnl routines
More accurate return values for the following (new) dcbnl routines:
dcbnl_getdcbx()
dcbnl_setdcbx()
dcbnl_getfeatcfg()
dcbnl_setfeatcfg()
Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index ff3c12d..9399af5 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1286,10 +1286,10 @@
static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
u32 pid, u32 seq, u16 flags)
{
- int ret = -EINVAL;
+ int ret;
if (!netdev->dcbnl_ops->getdcbx)
- return ret;
+ return -EOPNOTSUPP;
ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
@@ -1300,11 +1300,14 @@
static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
u32 pid, u32 seq, u16 flags)
{
- int ret = -EINVAL;
+ int ret;
u8 value;
- if (!tb[DCB_ATTR_DCBX] || !netdev->dcbnl_ops->setdcbx)
- return ret;
+ if (!netdev->dcbnl_ops->setdcbx)
+ return -EOPNOTSUPP;
+
+ if (!tb[DCB_ATTR_DCBX])
+ return -EINVAL;
value = nla_get_u8(tb[DCB_ATTR_DCBX]);
@@ -1323,23 +1326,23 @@
struct dcbmsg *dcb;
struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
u8 value;
- int ret = -EINVAL;
- int i;
+ int ret, i;
int getall = 0;
- if (!tb[DCB_ATTR_FEATCFG] || !netdev->dcbnl_ops->getfeatcfg)
- return ret;
+ if (!netdev->dcbnl_ops->getfeatcfg)
+ return -EOPNOTSUPP;
+
+ if (!tb[DCB_ATTR_FEATCFG])
+ return -EINVAL;
ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
dcbnl_featcfg_nest);
- if (ret) {
- ret = -EINVAL;
+ if (ret)
goto err_out;
- }
dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!dcbnl_skb) {
- ret = -EINVAL;
+ ret = -ENOBUFS;
goto err_out;
}
@@ -1351,8 +1354,8 @@
nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
if (!nest) {
- ret = -EINVAL;
- goto err;
+ ret = -EMSGSIZE;
+ goto nla_put_failure;
}
if (data[DCB_FEATCFG_ATTR_ALL])
@@ -1363,30 +1366,22 @@
continue;
ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
- if (!ret) {
+ 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;
+ if (ret) {
+ nla_nest_cancel(dcbnl_skb, nest);
+ goto nla_put_failure;
+ }
}
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;
+ return rtnl_unicast(dcbnl_skb, &init_net, pid);
+nla_put_failure:
+ nlmsg_cancel(dcbnl_skb, nlh);
nlmsg_failure:
-err:
kfree_skb(dcbnl_skb);
err_out:
return ret;
@@ -1396,20 +1391,20 @@
u32 pid, u32 seq, u16 flags)
{
struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
- int ret = -EINVAL;
+ int ret, i;
u8 value;
- int i;
- if (!tb[DCB_ATTR_FEATCFG] || !netdev->dcbnl_ops->setfeatcfg)
- return ret;
+ if (!netdev->dcbnl_ops->setfeatcfg)
+ return -ENOTSUPP;
+
+ if (!tb[DCB_ATTR_FEATCFG])
+ return -EINVAL;
ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
dcbnl_featcfg_nest);
- if (ret) {
- ret = -EINVAL;
+ if (ret)
goto err;
- }
for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
if (data[i] == NULL)
@@ -1420,14 +1415,12 @@
ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
if (ret)
- goto operr;
+ goto err;
}
-
-operr:
- ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SFEATCFG,
- DCB_ATTR_FEATCFG, pid, seq, flags);
-
err:
+ dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
+ pid, seq, flags);
+
return ret;
}