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authorBenjamin Thery <benjamin.thery@bull.net>2008-12-03 22:22:16 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-03 22:22:16 -0800
commit999890b21a8eff7559a140fcbd2cd4b34e685c76 (patch)
tree83f0c7fbb43e562c40cce760666d69de653abcf0 /net/ipv6/ip6mr.c
parent1ea472e2dedcf23d5f31c63fc790cccfab93c0de (diff)
downloadlinux-2.6.34-ux500-999890b21a8eff7559a140fcbd2cd4b34e685c76.tar.gz
net: /proc/net/ip_mr_cache, display Iif as a signed short
Today, iproute2 fails to show multicast forwarding unresolved cache entries while scanning /proc/net/ip_mr_cache. Indeed, it expects to see -1 in 'Iif' column to identify unresolved entries but the kernel outputs 65535. It's a signed/unsigned issue: 'Iif', the source interface, is retrieved from member mfc_parent in struct mfc_cache. mfc_parent is a vifi_t: unsigned short, but is displayed in ipmr_mfc_seq_show() as "%-3d", signed integer. In unresolevd entries, the 65535 value (0xFFFF) comes from this define: #define ALL_VIFS ((vifi_t)(-1)) That may explains why the guy who added support for this in iproute2 thought a -1 should be expected. I don't know if this must be fixed in kernel or in iproute2. Who is right? What is the correct API? How was it designed originally? I let you decide if it should goes in the kernel or be fixed in iproute2. Signed-off-by: Benjamin Thery <benjamin.thery@bull.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6mr.c')
-rw-r--r--net/ipv6/ip6mr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 2dc4b019087..1446bec895a 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -297,7 +297,7 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
const struct mfc6_cache *mfc = v;
const struct ipmr_mfc_iter *it = seq->private;
- seq_printf(seq, "%pI6 %pI6 %-3d",
+ seq_printf(seq, "%pI6 %pI6 %-3hd",
&mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
mfc->mf6c_parent);