netdev - [PATCH iproute2] libnetlink: check flag NLM_F_DUMP

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Message-Id: <1363963557-3888-1-git-send-email-nicolas.dichtel@6wind.com>
Date:	Fri, 22 Mar 2013 15:45:57 +0100
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	shemminger@...tta.com
Cc:	netdev@...r.kernel.org, Nicolas Dichtel <nicolas.dichtel@...nd.com>
Subject: [PATCH iproute2] libnetlink: check flag NLM_F_DUMP_INTR during dumps

When this flag is set, it means that dump was interrupted and result may be
wrong. Ask user to restart.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
---
 lib/libnetlink.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index f262959..91991cf 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -230,6 +230,12 @@ int rtnl_dump_filter_l(struct rtnl_handle *rth,
 				    h->nlmsg_seq != rth->dump)
 					goto skip_it;
 
+				if (h->nlmsg_flags & NLM_F_DUMP_INTR) {
+					fprintf(stderr,
+						"Dump was interrupted, please restart.\n");
+					return -1;
+				}
+
 				if (h->nlmsg_type == NLMSG_DONE) {
 					found_done = 1;
 					break; /* process next filter */
-- 
1.8.0.1

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