nexthop: Only parse NHA_OP_FLAGS for dump messages that require it

The attribute is parsed in __nh_valid_dump_req() which is called by the
dump handlers of RTM_GETNEXTHOP and RTM_GETNEXTHOPBUCKET although it is
only used by the former and rejected by the policy of the latter.

Move the parsing to nh_valid_dump_req() which is only called by the dump
handler of RTM_GETNEXTHOP.

This is a preparation for a subsequent patch.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240311162307.545385-3-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 6901fa3..d166900 100644 (file)
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -3398,11 +3398,6 @@ static int __nh_valid_dump_req(const struct nlmsghdr *nlh, struct nlattr **tb,
                return -EINVAL;
        }
 
-       if (tb[NHA_OP_FLAGS])
-               filter->op_flags = nla_get_u32(tb[NHA_OP_FLAGS]);
-       else
-               filter->op_flags = 0;
-
        return 0;
 }
 
@@ -3418,6 +3413,11 @@ static int nh_valid_dump_req(const struct nlmsghdr *nlh,
        if (err < 0)
                return err;
 
+       if (tb[NHA_OP_FLAGS])
+               filter->op_flags = nla_get_u32(tb[NHA_OP_FLAGS]);
+       else
+               filter->op_flags = 0;
+
        return __nh_valid_dump_req(nlh, tb, filter, cb->extack);
 }