[PATCH net-next v9 01/23] netlink: add NLA_POLICY_MAX_LEN macro

Antonio Quartulli
2024-10-16T01:03:42Z

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@gmail.com
Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
---
include/net/netlink.h | 1 +
tools/net/ynl/ynl-gen-c.py | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/net/netlink.h b/include/net/netlink.h
index db6af207287c839408c58cb28b82408e0548eaca..2dc671c977ff3297975269d236264907009703d3 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 d64cb2b49c4437cfc018c669dadafdb43037e727..89ef308e56bbe287aee81e118f45cb951df88046 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -478,7 +478,7 @@ 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')
@@ -489,6 +489,8 @@ 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

--
2.45.2