netdev - [PATCH iproute2-next 1/4] libnetlink: Add rta_getattr

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Message-ID: <501f27b908eed65e94b569e88ee8a6396db71932.1709934897.git.petrm@nvidia.com>
Date: Fri, 8 Mar 2024 23:29:06 +0100
From: Petr Machata <petrm@...dia.com>
To: David Ahern <dsahern@...nel.org>, Stephen Hemminger
	<stephen@...workplumber.org>, <netdev@...r.kernel.org>
CC: Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>,
	<mlxsw@...dia.com>
Subject: [PATCH iproute2-next 1/4] libnetlink: Add rta_getattr_uint()

NLA_UINT attributes have a 4- or 8-byte payload. Add a function to extract
these.

Signed-off-by: Petr Machata <petrm@...dia.com>
---
 include/libnetlink.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/libnetlink.h b/include/libnetlink.h
index ad7e7127..a1233659 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -260,6 +260,12 @@ static inline __u64 rta_getattr_u64(const struct rtattr *rta)
 	memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
 	return tmp;
 }
+static inline __u64 rta_getattr_uint(const struct rtattr *rta)
+{
+	if (RTA_PAYLOAD(rta) == sizeof(__u32))
+		return rta_getattr_u32(rta);
+	return rta_getattr_u64(rta);
+}
 static inline __s32 rta_getattr_s32(const struct rtattr *rta)
 {
 	return *(__s32 *)RTA_DATA(rta);
-- 
2.43.0