From 4ebc1e3cfcd8778e2150bdb799b19e85348b8efa Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Fri, 4 Aug 2017 14:28:57 +0200 Subject: net: sched: remove unneeded tcf_em_tree_change Since tcf_em_tree_validate could be always called on a newly created filter, there is no need for this change function. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- net/sched/cls_basic.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'net/sched/cls_basic.c') diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c index c4fd63a068f9..979cd2683b46 100644 --- a/net/sched/cls_basic.c +++ b/net/sched/cls_basic.c @@ -130,7 +130,6 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp, { int err; struct tcf_exts e; - struct tcf_ematch_tree t; err = tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE); if (err < 0) @@ -139,7 +138,7 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp, if (err < 0) goto errout; - err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &t); + err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches); if (err < 0) goto errout; @@ -149,7 +148,6 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp, } tcf_exts_change(tp, &f->exts, &e); - tcf_em_tree_change(tp, &f->ematches, &t); f->tp = tp; return 0; -- cgit From ff1f8ca0805ab03c31e14a9356aa2ac81d65c338 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Fri, 4 Aug 2017 14:29:09 +0200 Subject: net: sched: cls_basic: no need to call tcf_exts_change for newly allocated struct As the f struct was allocated right before basic_set_parms call, no need to use tcf_exts_change to do atomic change, and we can just fill-up the unused exts struct directly by tcf_exts_validate. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- net/sched/cls_basic.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) (limited to 'net/sched/cls_basic.c') diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c index 979cd2683b46..7c7a82138f76 100644 --- a/net/sched/cls_basic.c +++ b/net/sched/cls_basic.c @@ -129,31 +129,22 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp, struct nlattr *est, bool ovr) { int err; - struct tcf_exts e; - err = tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE); + err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr); if (err < 0) return err; - err = tcf_exts_validate(net, tp, tb, est, &e, ovr); - if (err < 0) - goto errout; err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches); if (err < 0) - goto errout; + return err; if (tb[TCA_BASIC_CLASSID]) { f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]); tcf_bind_filter(tp, &f->res, base); } - tcf_exts_change(tp, &f->exts, &e); f->tp = tp; - return 0; -errout: - tcf_exts_destroy(&e); - return err; } static int basic_change(struct net *net, struct sk_buff *in_skb, -- cgit From 8113c095672f6504b23eba6edf4a57b5f7f744af Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Fri, 4 Aug 2017 21:31:43 -0700 Subject: net_sched: use void pointer for filter handle Now we use 'unsigned long fh' as a pointer in every place, it is safe to convert it to a void pointer now. This gets rid of many casts to pointer. Cc: Jamal Hadi Salim Cc: Jiri Pirko Signed-off-by: Cong Wang Acked-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/sched/cls_basic.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'net/sched/cls_basic.c') diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c index 7c7a82138f76..73cc7f167a38 100644 --- a/net/sched/cls_basic.c +++ b/net/sched/cls_basic.c @@ -56,20 +56,18 @@ static int basic_classify(struct sk_buff *skb, const struct tcf_proto *tp, return -1; } -static unsigned long basic_get(struct tcf_proto *tp, u32 handle) +static void *basic_get(struct tcf_proto *tp, u32 handle) { - unsigned long l = 0UL; struct basic_head *head = rtnl_dereference(tp->root); struct basic_filter *f; list_for_each_entry(f, &head->flist, link) { if (f->handle == handle) { - l = (unsigned long) f; - break; + return f; } } - return l; + return NULL; } static int basic_init(struct tcf_proto *tp) @@ -106,10 +104,10 @@ static void basic_destroy(struct tcf_proto *tp) kfree_rcu(head, rcu); } -static int basic_delete(struct tcf_proto *tp, unsigned long arg, bool *last) +static int basic_delete(struct tcf_proto *tp, void *arg, bool *last) { struct basic_head *head = rtnl_dereference(tp->root); - struct basic_filter *f = (struct basic_filter *) arg; + struct basic_filter *f = arg; list_del_rcu(&f->link); tcf_unbind_filter(tp, &f->res); @@ -149,7 +147,7 @@ static int basic_set_parms(struct net *net, struct tcf_proto *tp, static int basic_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, - struct nlattr **tca, unsigned long *arg, bool ovr) + struct nlattr **tca, void **arg, bool ovr) { int err; struct basic_head *head = rtnl_dereference(tp->root); @@ -202,7 +200,7 @@ static int basic_change(struct net *net, struct sk_buff *in_skb, if (err < 0) goto errout; - *arg = (unsigned long)fnew; + *arg = fnew; if (fold) { list_replace_rcu(&fold->link, &fnew->link); @@ -228,7 +226,7 @@ static void basic_walk(struct tcf_proto *tp, struct tcf_walker *arg) if (arg->count < arg->skip) goto skip; - if (arg->fn(tp, (unsigned long) f, arg) < 0) { + if (arg->fn(tp, f, arg) < 0) { arg->stop = 1; break; } @@ -237,10 +235,10 @@ skip: } } -static int basic_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, +static int basic_dump(struct net *net, struct tcf_proto *tp, void *fh, struct sk_buff *skb, struct tcmsg *t) { - struct basic_filter *f = (struct basic_filter *) fh; + struct basic_filter *f = fh; struct nlattr *nest; if (f == NULL) -- cgit From 07d79fc7d94e3f884b8b1c95aa615b202bb5e4c1 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Wed, 30 Aug 2017 14:30:36 -0700 Subject: net_sched: add reverse binding for tc class TC filters when used as classifiers are bound to TC classes. However, there is a hidden difference when adding them in different orders: 1. If we add tc classes before its filters, everything is fine. Logically, the classes exist before we specify their ID's in filters, it is easy to bind them together, just as in the current code base. 2. If we add tc filters before the tc classes they bind, we have to do dynamic lookup in fast path. What's worse, this happens all the time not just once, because on fast path tcf_result is passed on stack, there is no way to propagate back to the one in tc filters. This hidden difference hurts performance silently if we have many tc classes in hierarchy. This patch intends to close this gap by doing the reverse binding when we create a new class, in this case we can actually search all the filters in its parent, match and fixup by classid. And because tcf_result is specific to each type of tc filter, we have to introduce a new ops for each filter to tell how to bind the class. Note, we still can NOT totally get rid of those class lookup in ->enqueue() because cgroup and flow filters have no way to determine the classid at setup time, they still have to go through dynamic lookup. Cc: Jamal Hadi Salim Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- net/sched/cls_basic.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'net/sched/cls_basic.c') diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c index 73cc7f167a38..d89ebafd2239 100644 --- a/net/sched/cls_basic.c +++ b/net/sched/cls_basic.c @@ -235,6 +235,14 @@ skip: } } +static void basic_bind_class(void *fh, u32 classid, unsigned long cl) +{ + struct basic_filter *f = fh; + + if (f && f->res.classid == classid) + f->res.class = cl; +} + static int basic_dump(struct net *net, struct tcf_proto *tp, void *fh, struct sk_buff *skb, struct tcmsg *t) { @@ -280,6 +288,7 @@ static struct tcf_proto_ops cls_basic_ops __read_mostly = { .delete = basic_delete, .walk = basic_walk, .dump = basic_dump, + .bind_class = basic_bind_class, .owner = THIS_MODULE, }; -- cgit