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From c321cc07607cfe4215fc90e426ae4491fca4c49c Mon Sep 17 00:00:00 2001
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From: Adrian Reber <areber@redhat.com>
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Date: Thu, 22 Nov 2018 13:44:03 +0000
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Subject: [PATCH] Fix kerndat_link_nsid() on systems with more than 10
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interfaces
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On a system with more than 10 network interfaces the link_nsid check
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fails:
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$ criu check --feature link_nsid
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Warn (criu/cr-check.c:1237): NSID isn't supported
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The function kerndat_link_nsid() uses:
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nde.ifindex = 10;
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This fails as there is already an interface with ifindex 10.
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This patch moves the creation of the socket into the second network
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namespace and the feature check succeeds.
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Suggested-by: Jiri Benc <jbenc@redhat.com>
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Signed-off-by: Adrian Reber <areber@redhat.com>
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Signed-off-by: Andrei Vagin <avagin@gmail.com>
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---
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criu/net.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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diff --git a/criu/net.c b/criu/net.c
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index ec66d1e6c3..c1a6e3094f 100644
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--- a/criu/net.c
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+++ b/criu/net.c
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@@ -3148,12 +3148,6 @@ int kerndat_link_nsid()
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};
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int nsfd, sk, ret;
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- sk = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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- if (sk < 0) {
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- pr_perror("Unable to create a netlink socket");
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- exit(1);
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- }
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-
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if (unshare(CLONE_NEWNET)) {
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pr_perror("Unable create a network namespace");
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exit(1);
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@@ -3168,6 +3162,12 @@ int kerndat_link_nsid()
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exit(1);
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}
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+ sk = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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+ if (sk < 0) {
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+ pr_perror("Unable to create a netlink socket");
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+ exit(1);
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+ }
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+
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nde.type = ND_TYPE__VETH;
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nde.name = "veth";
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nde.ifindex = 10;
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