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| author | Ivan Vecera <ivecera@redhat.com> | 2018-02-08 16:10:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-08 22:47:37 -0800 |
| commit | 76d0b20282976f5bd306d04a493eb73303470e2d (patch) | |
| tree | a951a2419f48b015f417c7ef3a005fc019f86c97 /net | |
| parent | b933df76437b93b579e32b3a41f011da99497446 (diff) | |
net/sched: cls_u32: fix cls_u32 on filter replace
[ Upstream commit eb53f7af6f15285e2f6ada97285395343ce9f433 ]
The following sequence is currently broken:
# tc qdisc add dev foo ingress
# tc filter replace dev foo protocol all ingress \
u32 match u8 0 0 action mirred egress mirror dev bar1
# tc filter replace dev foo protocol all ingress \
handle 800::800 pref 49152 \
u32 match u8 0 0 action mirred egress mirror dev bar2
Error: cls_u32: Key node flags do not match passed flags.
We have an error talking to the kernel, -1
The error comes from u32_change() when comparing new and
existing flags. The existing ones always contains one of
TCA_CLS_FLAGS_{,NOT}_IN_HW flag depending on offloading state.
These flags cannot be passed from userspace so the condition
(n->flags != flags) in u32_change() always fails.
Fix the condition so the flags TCA_CLS_FLAGS_NOT_IN_HW and
TCA_CLS_FLAGS_IN_HW are not taken into account.
Fixes: 24d3dc6d27ea ("net/sched: cls_u32: Reflect HW offload status")
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/cls_u32.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index 33294b5b2c6a..e5378b2247bb 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -928,7 +928,8 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, if (TC_U32_KEY(n->handle) == 0) return -EINVAL; - if (n->flags != flags) + if ((n->flags ^ flags) & + ~(TCA_CLS_FLAGS_IN_HW | TCA_CLS_FLAGS_NOT_IN_HW)) return -EINVAL; new = u32_init_knode(tp, n); |