Allow callers of the dump API to handle nlmsg errors (e.g., an
unsupported feature). Setting RTNL_HANDLE_F_SUPPRESS_NLERR in the
rtnl_handle avoids unnecessary messages to the users in some case.
For example,
RTNETLINK answers: Operation not supported
when probing for support of a new feature.
Signed-off-by: David Ahern <d...@cumulusnetworks.com>
---
include/libnetlink.h | 1 +
lib/libnetlink.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/libnetlink.h b/include/libnetlink.h
index bd0267dfcc02..c43ab0a2d9d9 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -21,6 +21,7 @@ struct rtnl_handle {
int proto;
FILE *dump_fp;
#define RTNL_HANDLE_F_LISTEN_ALL_NSID 0x01
+#define RTNL_HANDLE_F_SUPPRESS_NLERR 0x02
int flags;
};
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 9303b6686e2c..5b75b2db4e0b 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -299,7 +299,8 @@ static void rtnl_dump_error(const struct rtnl_handle *rth,
errno == EOPNOTSUPP))
return;
- perror("RTNETLINK answers");
+ if (!(rth->flags & RTNL_HANDLE_F_SUPPRESS_NLERR))
+ perror("RTNETLINK answers");
}
}
--
2.1.4
