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authorDaniel Borkmann <daniel@iogearbox.net>2016-03-18 18:37:59 +0100
committerDavid S. Miller <davem@davemloft.net>2016-03-20 13:44:34 -0400
commit69716a2b51aeb68fe295c0d09e26c8781eacebde (patch)
treedea003dce3acd0e36e5a248b49fd159a8c76845f /include
parentgeneve: fix populating tclass in geneve_get_v6_dst (diff)
downloadlinux-dev-69716a2b51aeb68fe295c0d09e26c8781eacebde.tar.xz
linux-dev-69716a2b51aeb68fe295c0d09e26c8781eacebde.zip
ipv6, trace: fix tos reporting on fib6_table_lookup
flowi6_tos of struct flowi6 is unused in IPv6, therefore dumping tos on that tracepoint will also give incorrect information wrt traffic class. If we want to fix it, we need to extract it via ip6_tclass(flp->flowlabel). While for the same test case I get a count of 0 non-zero tos values before the change, they now start to show up after the change: # ./perf record -e fib6:fib6_table_lookup -a sleep 10 # ./perf script | grep -v "tos 0" | wc -l 60 Since there's no user in the kernel tree anymore of flowi6_tos, remove the define to avoid any future confusion on this. Fixes: b811580d91e9 ("net: IPv6 fib lookup tracepoint") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/flow.h2
-rw-r--r--include/trace/events/fib6.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/include/net/flow.h b/include/net/flow.h
index 83969eebebf3..d47ef4bb5423 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -127,7 +127,6 @@ struct flowi6 {
#define flowi6_oif __fl_common.flowic_oif
#define flowi6_iif __fl_common.flowic_iif
#define flowi6_mark __fl_common.flowic_mark
-#define flowi6_tos __fl_common.flowic_tos
#define flowi6_scope __fl_common.flowic_scope
#define flowi6_proto __fl_common.flowic_proto
#define flowi6_flags __fl_common.flowic_flags
@@ -135,6 +134,7 @@ struct flowi6 {
#define flowi6_tun_key __fl_common.flowic_tun_key
struct in6_addr daddr;
struct in6_addr saddr;
+ /* Note: flowi6_tos is encoded in flowlabel, too. */
__be32 flowlabel;
union flowi_uli uli;
#define fl6_sport uli.ports.sport
diff --git a/include/trace/events/fib6.h b/include/trace/events/fib6.h
index 4cf6bac4686d..d60096cddb2a 100644
--- a/include/trace/events/fib6.h
+++ b/include/trace/events/fib6.h
@@ -37,7 +37,7 @@ TRACE_EVENT(fib6_table_lookup,
__entry->tb_id = tb_id;
__entry->oif = flp->flowi6_oif;
__entry->iif = flp->flowi6_iif;
- __entry->tos = flp->flowi6_tos;
+ __entry->tos = ip6_tclass(flp->flowlabel);
__entry->scope = flp->flowi6_scope;
__entry->flags = flp->flowi6_flags;