netdev - [PATCH net-next v6 01/25] netlink: add NLA_POLICY_MAX

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240827120805.13681-2-antonio@openvpn.net>
Date: Tue, 27 Aug 2024 14:07:41 +0200
From: Antonio Quartulli <antonio@...nvpn.net>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	ryazanov.s.a@...il.com,
	edumazet@...gle.com,
	andrew@...n.ch,
	sd@...asysnail.net,
	Antonio Quartulli <antonio@...nvpn.net>,
	donald.hunter@...il.com
Subject: [PATCH net-next v6 01/25] 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.

Cc: donald.hunter@...il.com
Signed-off-by: Antonio Quartulli <antonio@...nvpn.net>
---
 include/net/netlink.h      | 1 +
 tools/net/ynl/ynl-gen-c.py | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/include/net/netlink.h b/include/net/netlink.h
index db6af207287c..2dc671c977ff 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -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
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 717530bc9c52..3ccbb301be87 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -466,6 +466,8 @@ class TypeBinary(Type):
     def _attr_policy(self, policy):
         if 'exact-len' in self.checks:
             mem = 'NLA_POLICY_EXACT_LEN(' + str(self.get_limit('exact-len')) + ')'
+        elif 'max-len' in self.checks:
+            mem = 'NLA_POLICY_MAX_LEN(' + str(self.get_limit('max-len')) + ')'
         else:
             mem = '{ '
             if len(self.checks) == 1 and 'min-len' in self.checks:
-- 
2.44.2