Commit 4138e9ec authored by Antonio Quartulli's avatar Antonio Quartulli Committed by Jakub Kicinski
Browse files

netlink: add NLA_POLICY_MAX_LEN macro 



Similarly to NLA_POLICY_MIN_LEN, NLA_POLICY_MAX_LEN defines a policy
with a maximum length value.

The netlink generator for YAML specs has been extended accordingly.

Signed-off-by: default avatarAntonio Quartulli <antonio@openvpn.net>
Reviewed-by: default avatarDonald Hunter <donald.hunter@gmail.com>
Link: https://patch.msgid.link/20241029-b4-ovpn-v11-1-de4698c73a25@openvpn.net


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent bd50c412

include/net/netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -469,6 +469,7 @@ struct nla_policy { 
	.max = _len						\

}

#define NLA_POLICY_MIN_LEN(_len)	NLA_POLICY_MIN(NLA_BINARY, _len)

#define NLA_POLICY_MAX_LEN(_len)	NLA_POLICY_MAX(NLA_BINARY, _len)



/**

 * struct nl_info - netlink source information

tools/net/ynl/ynl-gen-c.py

+3 −1
Original line number Diff line number Diff line
@@ -481,7 +481,7 @@ class TypeBinary(Type): 
            pass

        elif len(self.checks) == 1:

            check_name = list(self.checks)[0]

            if check_name not in {'exact-len', 'min-len'}:

            if check_name not in {'exact-len', 'min-len', 'max-len'}:

                raise Exception('Unsupported check for binary type: ' + check_name)

        else:

            raise Exception('More than one check for binary type not implemented, yet')
@@ -492,6 +492,8 @@ class TypeBinary(Type): 
            mem = 'NLA_POLICY_EXACT_LEN(' + self.get_limit_str('exact-len') + ')'

        elif 'min-len' in self.checks:

            mem = '{ .len = ' + self.get_limit_str('min-len') + ', }'

        elif 'max-len' in self.checks:

            mem = 'NLA_POLICY_MAX_LEN(' + self.get_limit_str('max-len') + ')'



        return mem