diff options
| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2019-03-28 10:35:06 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-01 14:13:25 -0700 |
| commit | 0db6f8befc32c68bb13d7ffbb2e563c79e913e13 (patch) | |
| tree | 26e55ff66f62020c753e348f7a8902649ff4ad17 /net | |
| parent | 8c83f2df9c6578ea4c5b940d8238ad8a41b87e9e (diff) | |
| download | linux-0db6f8befc32c68bb13d7ffbb2e563c79e913e13.tar.bz2 | |
net/sched: fix ->get helper of the matchall cls
It returned always NULL, thus it was never possible to get the filter.
Example:
$ ip link add foo type dummy
$ ip link add bar type dummy
$ tc qdisc add dev foo clsact
$ tc filter add dev foo protocol all pref 1 ingress handle 1234 \
matchall action mirred ingress mirror dev bar
Before the patch:
$ tc filter get dev foo protocol all pref 1 ingress handle 1234 matchall
Error: Specified filter handle not found.
We have an error talking to the kernel
After:
$ tc filter get dev foo protocol all pref 1 ingress handle 1234 matchall
filter ingress protocol all pref 1 matchall chain 0 handle 0x4d2
not_in_hw
action order 1: mirred (Ingress Mirror to device bar) pipe
index 1 ref 1 bind 1
CC: Yotam Gigi <yotamg@mellanox.com>
CC: Jiri Pirko <jiri@mellanox.com>
Fixes: fd62d9f5c575 ("net/sched: matchall: Fix configuration race")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/cls_matchall.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c index 459921bd3d87..a13bc351a414 100644 --- a/net/sched/cls_matchall.c +++ b/net/sched/cls_matchall.c @@ -130,6 +130,11 @@ static void mall_destroy(struct tcf_proto *tp, bool rtnl_held, static void *mall_get(struct tcf_proto *tp, u32 handle) { + struct cls_mall_head *head = rtnl_dereference(tp->root); + + if (head && head->handle == handle) + return head; + return NULL; } |