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-rw-r--r--netlink.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/netlink.c b/netlink.c
index 9ff93a4..d5c9439 100644
--- a/netlink.c
+++ b/netlink.c
@@ -35,7 +35,14 @@
#include "log.h"
#include "netlink.h"
-#define NLBUFSIZ (8192 * sizeof(struct nlmsghdr)) /* See netlink(7) */
+/* Netlink expects a buffer of at least 8kiB or the system page size,
+ * whichever is larger. 32kiB is recommended for more efficient.
+ * Since the largest page size on any remotely common Linux setup is
+ * 64kiB (ppc64), that should cover it.
+ *
+ * https://www.kernel.org/doc/html/next/userspace-api/netlink/intro.html#buffer-sizing
+ */
+#define NLBUFSIZ 65536
/* Socket in init, in target namespace, sequence (just needs to be monotonic) */
int nl_sock = -1;