diff options
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netlink.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h index d34ceeba82a8..6a106ef5ca56 100644 --- a/include/net/netlink.h +++ b/include/net/netlink.h @@ -193,13 +193,14 @@ enum nla_policy_validation { NLA_VALIDATE_RANGE, NLA_VALIDATE_MIN, NLA_VALIDATE_MAX, + NLA_VALIDATE_FUNCTION, }; /** * struct nla_policy - attribute validation policy * @type: Type of attribute or NLA_UNSPEC * @validation_type: type of attribute validation done in addition to - * type-specific validation (e.g. range), see + * type-specific validation (e.g. range, function call), see * &enum nla_policy_validation * @len: Type specific length of payload * @@ -269,6 +270,13 @@ enum nla_policy_validation { * of s16 - do that as usual in the code instead. * All other Unused - but note that it's a union * + * Meaning of `validate' field, use via NLA_POLICY_VALIDATE_FN: + * NLA_BINARY Validation function called for the attribute, + * not compatible with use of the validation_data + * as in NLA_BITFIELD32, NLA_REJECT, NLA_NESTED and + * NLA_NESTED_ARRAY. + * All other Unused - but note that it's a union + * * Example: * static const struct nla_policy my_policy[ATTR_MAX+1] = { * [ATTR_FOO] = { .type = NLA_U16 }, @@ -286,6 +294,8 @@ struct nla_policy { struct { s16 min, max; }; + int (*validate)(const struct nlattr *attr, + struct netlink_ext_ack *extack); }; }; @@ -307,6 +317,11 @@ struct nla_policy { tp == NLA_S16 || tp == NLA_U16 || \ tp == NLA_S32 || tp == NLA_U32 || \ tp == NLA_S64 || tp == NLA_U64) + tp) +#define NLA_ENSURE_NO_VALIDATION_PTR(tp) \ + (__NLA_ENSURE(tp != NLA_BITFIELD32 && \ + tp != NLA_REJECT && \ + tp != NLA_NESTED && \ + tp != NLA_NESTED_ARRAY) + tp) #define NLA_POLICY_RANGE(tp, _min, _max) { \ .type = NLA_ENSURE_INT_TYPE(tp), \ @@ -327,6 +342,13 @@ struct nla_policy { .max = _max, \ } +#define NLA_POLICY_VALIDATE_FN(tp, fn, ...) { \ + .type = NLA_ENSURE_NO_VALIDATION_PTR(tp), \ + .validation_type = NLA_VALIDATE_FUNCTION, \ + .validate = fn, \ + .len = __VA_ARGS__ + 0, \ +} + /** * struct nl_info - netlink source information * @nlh: Netlink message header of original request |