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| author | Johannes Berg <johannes.berg@intel.com> | 2019-01-25 12:08:28 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-02-01 13:06:55 +0300 |
| commit | 23323289b1543b445d1f10aeab1bcfd84f2ca50a (patch) | |
| tree | ebf5858e66a307631968e165bd788a1314991f2b /include/net/netlink.h | |
| parent | 752cfee90d11e280d727617bf8d6df894141e157 (diff) | |
| download | linux-23323289b1543b445d1f10aeab1bcfd84f2ca50a.tar.xz | |
netlink: reduce NLA_POLICY_NESTED{,_ARRAY} arguments
In typical cases, there's no need to pass both the maxattr
and the policy array pointer, as the maxattr should just be
ARRAY_SIZE(policy) - 1. Therefore, to be less error prone,
just remove the maxattr argument from the default macros
and deduce the size accordingly.
Leave the original macros with a leading underscore to use
here and in case somebody needs to pass a policy pointer
where the policy isn't declared in the same place and thus
ARRAY_SIZE() cannot be used.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/netlink.h')
| -rw-r--r-- | include/net/netlink.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h index 4c1e99303b5a..23f27b0b3cef 100644 --- a/include/net/netlink.h +++ b/include/net/netlink.h @@ -306,10 +306,14 @@ struct nla_policy { #define NLA_POLICY_ETH_ADDR NLA_POLICY_EXACT_LEN(ETH_ALEN) #define NLA_POLICY_ETH_ADDR_COMPAT NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN) -#define NLA_POLICY_NESTED(maxattr, policy) \ +#define _NLA_POLICY_NESTED(maxattr, policy) \ { .type = NLA_NESTED, .validation_data = policy, .len = maxattr } -#define NLA_POLICY_NESTED_ARRAY(maxattr, policy) \ +#define _NLA_POLICY_NESTED_ARRAY(maxattr, policy) \ { .type = NLA_NESTED_ARRAY, .validation_data = policy, .len = maxattr } +#define NLA_POLICY_NESTED(policy) \ + _NLA_POLICY_NESTED(ARRAY_SIZE(policy) - 1, policy) +#define NLA_POLICY_NESTED_ARRAY(policy) \ + _NLA_POLICY_NESTED_ARRAY(ARRAY_SIZE(policy) - 1, policy) #define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition)) #define NLA_ENSURE_INT_TYPE(tp) \ |