Merge tag 'v4.15-rc1' into next-seccomp

Linux 4.15-rc1

1 files changed, 89 insertions, 34 deletions

diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index 8a8a58357c39..67467ae24c97 100644
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -13,6 +13,7 @@
 #include <net/act_api.h>
 #include <net/netlink.h>
 #include <net/pkt_cls.h>
+#include <net/sch_generic.h>
 
 /*
  * Passing parameters to the root seems to be done more awkwardly than really
@@ -27,14 +28,20 @@
 struct tcindex_filter_result {
 	struct tcf_exts		exts;
 	struct tcf_result	res;
-	struct rcu_head		rcu;
+	union {
+		struct work_struct	work;
+		struct rcu_head		rcu;
+	};
 };
 
 struct tcindex_filter {
 	u16 key;
 	struct tcindex_filter_result result;
 	struct tcindex_filter __rcu *next;
-	struct rcu_head rcu;
+	union {
+		struct work_struct work;
+		struct rcu_head rcu;
+	};
 };
 
 
@@ -52,7 +59,7 @@ struct tcindex_data {
 
 static inline int tcindex_filter_is_set(struct tcindex_filter_result *r)
 {
-	return tcf_exts_is_predicative(&r->exts) || r->res.classid;
+	return tcf_exts_has_actions(&r->exts) || r->res.classid;
 }
 
 static struct tcindex_filter_result *tcindex_lookup(struct tcindex_data *p,
@@ -90,9 +97,11 @@ static int tcindex_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 
 	f = tcindex_lookup(p, key);
 	if (!f) {
+		struct Qdisc *q = tcf_block_q(tp->chain->block);
+
 		if (!p->fall_through)
 			return -1;
-		res->classid = TC_H_MAKE(TC_H_MAJ(tp->q->handle), key);
+		res->classid = TC_H_MAKE(TC_H_MAJ(q->handle), key);
 		res->class = 0;
 		pr_debug("alg 0x%x\n", res->classid);
 		return 0;
@@ -104,16 +113,16 @@ static int tcindex_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 }
 
 
-static unsigned long tcindex_get(struct tcf_proto *tp, u32 handle)
+static void *tcindex_get(struct tcf_proto *tp, u32 handle)
 {
 	struct tcindex_data *p = rtnl_dereference(tp->root);
 	struct tcindex_filter_result *r;
 
 	pr_debug("tcindex_get(tp %p,handle 0x%08x)\n", tp, handle);
 	if (p->perfect && handle >= p->alloc_hash)
-		return 0;
+		return NULL;
 	r = tcindex_lookup(p, handle);
-	return r && tcindex_filter_is_set(r) ? (unsigned long) r : 0UL;
+	return r && tcindex_filter_is_set(r) ? r : NULL;
 }
 
 static int tcindex_init(struct tcf_proto *tp)
@@ -133,12 +142,46 @@ static int tcindex_init(struct tcf_proto *tp)
 	return 0;
 }
 
+static void __tcindex_destroy_rexts(struct tcindex_filter_result *r)
+{
+	tcf_exts_destroy(&r->exts);
+	tcf_exts_put_net(&r->exts);
+}
+
+static void tcindex_destroy_rexts_work(struct work_struct *work)
+{
+	struct tcindex_filter_result *r;
+
+	r = container_of(work, struct tcindex_filter_result, work);
+	rtnl_lock();
+	__tcindex_destroy_rexts(r);
+	rtnl_unlock();
+}
+
 static void tcindex_destroy_rexts(struct rcu_head *head)
 {
 	struct tcindex_filter_result *r;
 
 	r = container_of(head, struct tcindex_filter_result, rcu);
-	tcf_exts_destroy(&r->exts);
+	INIT_WORK(&r->work, tcindex_destroy_rexts_work);
+	tcf_queue_work(&r->work);
+}
+
+static void __tcindex_destroy_fexts(struct tcindex_filter *f)
+{
+	tcf_exts_destroy(&f->result.exts);
+	tcf_exts_put_net(&f->result.exts);
+	kfree(f);
+}
+
+static void tcindex_destroy_fexts_work(struct work_struct *work)
+{
+	struct tcindex_filter *f = container_of(work, struct tcindex_filter,
+						work);
+
+	rtnl_lock();
+	__tcindex_destroy_fexts(f);
+	rtnl_unlock();
 }
 
 static void tcindex_destroy_fexts(struct rcu_head *head)
@@ -146,18 +189,18 @@ static void tcindex_destroy_fexts(struct rcu_head *head)
 	struct tcindex_filter *f = container_of(head, struct tcindex_filter,
 						rcu);
 
-	tcf_exts_destroy(&f->result.exts);
-	kfree(f);
+	INIT_WORK(&f->work, tcindex_destroy_fexts_work);
+	tcf_queue_work(&f->work);
 }
 
-static int tcindex_delete(struct tcf_proto *tp, unsigned long arg, bool *last)
+static int tcindex_delete(struct tcf_proto *tp, void *arg, bool *last)
 {
 	struct tcindex_data *p = rtnl_dereference(tp->root);
-	struct tcindex_filter_result *r = (struct tcindex_filter_result *) arg;
+	struct tcindex_filter_result *r = arg;
 	struct tcindex_filter __rcu **walk;
 	struct tcindex_filter *f = NULL;
 
-	pr_debug("tcindex_delete(tp %p,arg 0x%lx),p %p\n", tp, arg, p);
+	pr_debug("tcindex_delete(tp %p,arg %p),p %p\n", tp, arg, p);
 	if (p->perfect) {
 		if (!r->res.class)
 			return -ENOENT;
@@ -182,18 +225,24 @@ found:
 	 * grace period, since converted-to-rcu actions are relying on that
 	 * in cleanup() callback
 	 */
-	if (f)
-		call_rcu(&f->rcu, tcindex_destroy_fexts);
-	else
-		call_rcu(&r->rcu, tcindex_destroy_rexts);
+	if (f) {
+		if (tcf_exts_get_net(&f->result.exts))
+			call_rcu(&f->rcu, tcindex_destroy_fexts);
+		else
+			__tcindex_destroy_fexts(f);
+	} else {
+		if (tcf_exts_get_net(&r->exts))
+			call_rcu(&r->rcu, tcindex_destroy_rexts);
+		else
+			__tcindex_destroy_rexts(r);
+	}
 
 	*last = false;
 	return 0;
 }
 
 static int tcindex_destroy_element(struct tcf_proto *tp,
-				   unsigned long arg,
-				   struct tcf_walker *walker)
+				   void *arg, struct tcf_walker *walker)
 {
 	bool last;
 
@@ -419,9 +468,9 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
 	}
 
 	if (old_r)
-		tcf_exts_change(tp, &r->exts, &e);
+		tcf_exts_change(&r->exts, &e);
 	else
-		tcf_exts_change(tp, &cr.exts, &e);
+		tcf_exts_change(&cr.exts, &e);
 
 	if (old_r && old_r != r) {
 		err = tcindex_filter_result_init(old_r);
@@ -439,7 +488,7 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
 		struct tcindex_filter *nfp;
 		struct tcindex_filter __rcu **fp;
 
-		tcf_exts_change(tp, &f->result.exts, &r->exts);
+		tcf_exts_change(&f->result.exts, &r->exts);
 
 		fp = cp->h + (handle % cp->hash);
 		for (nfp = rtnl_dereference(*fp);
@@ -471,17 +520,17 @@ errout:
 static int
 tcindex_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)
 {
 	struct nlattr *opt = tca[TCA_OPTIONS];
 	struct nlattr *tb[TCA_TCINDEX_MAX + 1];
 	struct tcindex_data *p = rtnl_dereference(tp->root);
-	struct tcindex_filter_result *r = (struct tcindex_filter_result *) *arg;
+	struct tcindex_filter_result *r = *arg;
 	int err;
 
 	pr_debug("tcindex_change(tp %p,handle 0x%08x,tca %p,arg %p),opt %p,"
-	    "p %p,r %p,*arg 0x%lx\n",
-	    tp, handle, tca, arg, opt, p, r, arg ? *arg : 0L);
+	    "p %p,r %p,*arg %p\n",
+	    tp, handle, tca, arg, opt, p, r, arg ? *arg : NULL);
 
 	if (!opt)
 		return 0;
@@ -506,9 +555,7 @@ static void tcindex_walk(struct tcf_proto *tp, struct tcf_walker *walker)
 			if (!p->perfect[i].res.class)
 				continue;
 			if (walker->count >= walker->skip) {
-				if (walker->fn(tp,
-				    (unsigned long) (p->perfect+i), walker)
-				     < 0) {
+				if (walker->fn(tp, p->perfect + i, walker) < 0) {
 					walker->stop = 1;
 					return;
 				}
@@ -522,8 +569,7 @@ static void tcindex_walk(struct tcf_proto *tp, struct tcf_walker *walker)
 		for (f = rtnl_dereference(p->h[i]); f; f = next) {
 			next = rtnl_dereference(f->next);
 			if (walker->count >= walker->skip) {
-				if (walker->fn(tp, (unsigned long) &f->result,
-				    walker) < 0) {
+				if (walker->fn(tp, &f->result, walker) < 0) {
 					walker->stop = 1;
 					return;
 				}
@@ -548,14 +594,14 @@ static void tcindex_destroy(struct tcf_proto *tp)
 }
 
 
-static int tcindex_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
+static int tcindex_dump(struct net *net, struct tcf_proto *tp, void *fh,
 			struct sk_buff *skb, struct tcmsg *t)
 {
 	struct tcindex_data *p = rtnl_dereference(tp->root);
-	struct tcindex_filter_result *r = (struct tcindex_filter_result *) fh;
+	struct tcindex_filter_result *r = fh;
 	struct nlattr *nest;
 
-	pr_debug("tcindex_dump(tp %p,fh 0x%lx,skb %p,t %p),p %p,r %p\n",
+	pr_debug("tcindex_dump(tp %p,fh %p,skb %p,t %p),p %p,r %p\n",
 		 tp, fh, skb, t, p, r);
 	pr_debug("p->perfect %p p->h %p\n", p->perfect, p->h);
 
@@ -610,6 +656,14 @@ nla_put_failure:
 	return -1;
 }
 
+static void tcindex_bind_class(void *fh, u32 classid, unsigned long cl)
+{
+	struct tcindex_filter_result *r = fh;
+
+	if (r && r->res.classid == classid)
+		r->res.class = cl;
+}
+
 static struct tcf_proto_ops cls_tcindex_ops __read_mostly = {
 	.kind		=	"tcindex",
 	.classify	=	tcindex_classify,
@@ -620,6 +674,7 @@ static struct tcf_proto_ops cls_tcindex_ops __read_mostly = {
 	.delete		=	tcindex_delete,
 	.walk		=	tcindex_walk,
 	.dump		=	tcindex_dump,
+	.bind_class	=	tcindex_bind_class,
 	.owner		=	THIS_MODULE,
 };