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| author | Vlad Buslov <vladbu@nvidia.com> | 2020-11-27 17:12:05 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-12-01 11:24:56 -0800 |
| commit | 0fca55ed988a694f5896f36de2a8f18715a78279 (patch) | |
| tree | 0f303bc1548cf5c875302ba429b69bb68c47f3b8 | |
| parent | cb7fb043e69a109057fa94510ff5d5602207d548 (diff) | |
| download | linux-0fca55ed988a694f5896f36de2a8f18715a78279.tar.gz linux-0fca55ed988a694f5896f36de2a8f18715a78279.tar.bz2 linux-0fca55ed988a694f5896f36de2a8f18715a78279.zip | |
net: sched: remove redundant 'rtnl_held' argument
Functions tfilter_notify_chain() and tcf_get_next_proto() are always called
with rtnl lock held in current implementation. Moreover, attempting to call
them without rtnl lock would cause a warning down the call chain in
function __tcf_get_next_proto() that requires the lock to be held by
callers. Remove the 'rtnl_held' argument in order to simplify the code and
make rtnl lock requirement explicit.
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Link: https://lore.kernel.org/r/20201127151205.23492-1-vladbu@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/net/pkt_cls.h | 2 | ||||
| -rw-r--r-- | net/sched/cls_api.c | 18 | ||||
| -rw-r--r-- | net/sched/sch_api.c | 4 |
3 files changed, 11 insertions, 13 deletions
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index 133f9ad4d4f9..0f2a9c44171c 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -48,7 +48,7 @@ void tcf_chain_put_by_act(struct tcf_chain *chain); struct tcf_chain *tcf_get_next_chain(struct tcf_block *block, struct tcf_chain *chain); struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain, - struct tcf_proto *tp, bool rtnl_held); + struct tcf_proto *tp); void tcf_block_netif_keep_dst(struct tcf_block *block); int tcf_block_get(struct tcf_block **p_block, struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index ff3e943febaa..37b77bd30974 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -991,13 +991,12 @@ __tcf_get_next_proto(struct tcf_chain *chain, struct tcf_proto *tp) */ struct tcf_proto * -tcf_get_next_proto(struct tcf_chain *chain, struct tcf_proto *tp, - bool rtnl_held) +tcf_get_next_proto(struct tcf_chain *chain, struct tcf_proto *tp) { struct tcf_proto *tp_next = __tcf_get_next_proto(chain, tp); if (tp) - tcf_proto_put(tp, rtnl_held, NULL); + tcf_proto_put(tp, true, NULL); return tp_next; } @@ -1924,15 +1923,14 @@ static int tfilter_del_notify(struct net *net, struct sk_buff *oskb, static void tfilter_notify_chain(struct net *net, struct sk_buff *oskb, struct tcf_block *block, struct Qdisc *q, u32 parent, struct nlmsghdr *n, - struct tcf_chain *chain, int event, - bool rtnl_held) + struct tcf_chain *chain, int event) { struct tcf_proto *tp; - for (tp = tcf_get_next_proto(chain, NULL, rtnl_held); - tp; tp = tcf_get_next_proto(chain, tp, rtnl_held)) + for (tp = tcf_get_next_proto(chain, NULL); + tp; tp = tcf_get_next_proto(chain, tp)) tfilter_notify(net, oskb, n, tp, block, - q, parent, NULL, event, false, rtnl_held); + q, parent, NULL, event, false, true); } static void tfilter_put(struct tcf_proto *tp, void *fh) @@ -2262,7 +2260,7 @@ static int tc_del_tfilter(struct sk_buff *skb, struct nlmsghdr *n, if (prio == 0) { tfilter_notify_chain(net, skb, block, q, parent, n, - chain, RTM_DELTFILTER, rtnl_held); + chain, RTM_DELTFILTER); tcf_chain_flush(chain, rtnl_held); err = 0; goto errout; @@ -2895,7 +2893,7 @@ replay: break; case RTM_DELCHAIN: tfilter_notify_chain(net, skb, block, q, parent, n, - chain, RTM_DELTFILTER, true); + chain, RTM_DELTFILTER); /* Flush the chain first as the user requested chain removal. */ tcf_chain_flush(chain, true); /* In case the chain was successfully deleted, put a reference diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 1a2d2471b078..51cb553e4317 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1943,8 +1943,8 @@ static int tc_bind_class_walker(struct Qdisc *q, unsigned long cl, chain = tcf_get_next_chain(block, chain)) { struct tcf_proto *tp; - for (tp = tcf_get_next_proto(chain, NULL, true); - tp; tp = tcf_get_next_proto(chain, tp, true)) { + for (tp = tcf_get_next_proto(chain, NULL); + tp; tp = tcf_get_next_proto(chain, tp)) { struct tcf_bind_args arg = {}; arg.w.fn = tcf_node_bind; |