net_sched: cleanups

Cleanup net/sched code to current CodingStyle and practices.

Reduce inline abuse

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 76 insertions, 61 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index b22ca2d1cebc..36ac0ec81ce0 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -187,7 +187,7 @@ int unregister_qdisc(struct Qdisc_ops *qops)
 	int err = -ENOENT;
 
 	write_lock(&qdisc_mod_lock);
-	for (qp = &qdisc_base; (q=*qp)!=NULL; qp = &q->next)
+	for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next)
 		if (q == qops)
 			break;
 	if (q) {
@@ -321,7 +321,9 @@ void qdisc_put_rtab(struct qdisc_rate_table *tab)
 	if (!tab || --tab->refcnt)
 		return;
 
-	for (rtabp = &qdisc_rtab_list; (rtab=*rtabp) != NULL; rtabp = &rtab->next) {
+	for (rtabp = &qdisc_rtab_list;
+	     (rtab = *rtabp) != NULL;
+	     rtabp = &rtab->next) {
 		if (rtab == tab) {
 			*rtabp = rtab->next;
 			kfree(rtab);
@@ -459,9 +461,8 @@ EXPORT_SYMBOL(qdisc_calculate_pkt_len);
 void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc)
 {
 	if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {
-		printk(KERN_WARNING
-		       "%s: %s qdisc %X: is non-work-conserving?\n",
-		       txt, qdisc->ops->id, qdisc->handle >> 16);
+		pr_warn("%s: %s qdisc %X: is non-work-conserving?\n",
+			txt, qdisc->ops->id, qdisc->handle >> 16);
 		qdisc->flags |= TCQ_F_WARN_NONWC;
 	}
 }
@@ -625,7 +626,7 @@ static u32 qdisc_alloc_handle(struct net_device *dev)
 			autohandle = TC_H_MAKE(0x80000000U, 0);
 	} while	(qdisc_lookup(dev, autohandle) && --i > 0);
 
-	return i>0 ? autohandle : 0;
+	return i > 0 ? autohandle : 0;
 }
 
 void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n)
@@ -915,9 +916,8 @@ out:
 	return 0;
 }
 
-struct check_loop_arg
-{
-	struct qdisc_walker 	w;
+struct check_loop_arg {
+	struct qdisc_walker	w;
 	struct Qdisc		*p;
 	int			depth;
 };
@@ -970,7 +970,8 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 	struct Qdisc *p = NULL;
 	int err;
 
-	if ((dev = __dev_get_by_index(net, tcm->tcm_ifindex)) == NULL)
+	dev = __dev_get_by_index(net, tcm->tcm_ifindex);
+	if (!dev)
 		return -ENODEV;
 
 	err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
@@ -980,12 +981,12 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 	if (clid) {
 		if (clid != TC_H_ROOT) {
 			if (TC_H_MAJ(clid) != TC_H_MAJ(TC_H_INGRESS)) {
-				if ((p = qdisc_lookup(dev, TC_H_MAJ(clid))) == NULL)
+				p = qdisc_lookup(dev, TC_H_MAJ(clid));
+				if (!p)
 					return -ENOENT;
 				q = qdisc_leaf(p, clid);
-			} else { /* ingress */
-				if (dev_ingress_queue(dev))
-					q = dev_ingress_queue(dev)->qdisc_sleeping;
+			} else if (dev_ingress_queue(dev)) {
+				q = dev_ingress_queue(dev)->qdisc_sleeping;
 			}
 		} else {
 			q = dev->qdisc;
@@ -996,7 +997,8 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 		if (tcm->tcm_handle && q->handle != tcm->tcm_handle)
 			return -EINVAL;
 	} else {
-		if ((q = qdisc_lookup(dev, tcm->tcm_handle)) == NULL)
+		q = qdisc_lookup(dev, tcm->tcm_handle);
+		if (!q)
 			return -ENOENT;
 	}
 
@@ -1008,7 +1010,8 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 			return -EINVAL;
 		if (q->handle == 0)
 			return -ENOENT;
-		if ((err = qdisc_graft(dev, p, skb, n, clid, NULL, q)) != 0)
+		err = qdisc_graft(dev, p, skb, n, clid, NULL, q);
+		if (err != 0)
 			return err;
 	} else {
 		qdisc_notify(net, skb, n, clid, NULL, q);
@@ -1017,7 +1020,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 }
 
 /*
-   Create/change qdisc.
+ * Create/change qdisc.
  */
 
 static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
@@ -1036,7 +1039,8 @@ replay:
 	clid = tcm->tcm_parent;
 	q = p = NULL;
 
-	if ((dev = __dev_get_by_index(net, tcm->tcm_ifindex)) == NULL)
+	dev = __dev_get_by_index(net, tcm->tcm_ifindex);
+	if (!dev)
 		return -ENODEV;
 
 	err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
@@ -1046,12 +1050,12 @@ replay:
 	if (clid) {
 		if (clid != TC_H_ROOT) {
 			if (clid != TC_H_INGRESS) {
-				if ((p = qdisc_lookup(dev, TC_H_MAJ(clid))) == NULL)
+				p = qdisc_lookup(dev, TC_H_MAJ(clid));
+				if (!p)
 					return -ENOENT;
 				q = qdisc_leaf(p, clid);
-			} else { /* ingress */
-				if (dev_ingress_queue_create(dev))
-					q = dev_ingress_queue(dev)->qdisc_sleeping;
+			} else if (dev_ingress_queue_create(dev)) {
+				q = dev_ingress_queue(dev)->qdisc_sleeping;
 			}
 		} else {
 			q = dev->qdisc;
@@ -1063,13 +1067,14 @@ replay:
 
 		if (!q || !tcm->tcm_handle || q->handle != tcm->tcm_handle) {
 			if (tcm->tcm_handle) {
-				if (q && !(n->nlmsg_flags&NLM_F_REPLACE))
+				if (q && !(n->nlmsg_flags & NLM_F_REPLACE))
 					return -EEXIST;
 				if (TC_H_MIN(tcm->tcm_handle))
 					return -EINVAL;
-				if ((q = qdisc_lookup(dev, tcm->tcm_handle)) == NULL)
+				q = qdisc_lookup(dev, tcm->tcm_handle);
+				if (!q)
 					goto create_n_graft;
-				if (n->nlmsg_flags&NLM_F_EXCL)
+				if (n->nlmsg_flags & NLM_F_EXCL)
 					return -EEXIST;
 				if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
 					return -EINVAL;
@@ -1079,7 +1084,7 @@ replay:
 				atomic_inc(&q->refcnt);
 				goto graft;
 			} else {
-				if (q == NULL)
+				if (!q)
 					goto create_n_graft;
 
 				/* This magic test requires explanation.
@@ -1101,9 +1106,9 @@ replay:
 				 *   For now we select create/graft, if
 				 *   user gave KIND, which does not match existing.
 				 */
-				if ((n->nlmsg_flags&NLM_F_CREATE) &&
-				    (n->nlmsg_flags&NLM_F_REPLACE) &&
-				    ((n->nlmsg_flags&NLM_F_EXCL) ||
+				if ((n->nlmsg_flags & NLM_F_CREATE) &&
+				    (n->nlmsg_flags & NLM_F_REPLACE) &&
+				    ((n->nlmsg_flags & NLM_F_EXCL) ||
 				     (tca[TCA_KIND] &&
 				      nla_strcmp(tca[TCA_KIND], q->ops->id))))
 					goto create_n_graft;
@@ -1118,7 +1123,7 @@ replay:
 	/* Change qdisc parameters */
 	if (q == NULL)
 		return -ENOENT;
-	if (n->nlmsg_flags&NLM_F_EXCL)
+	if (n->nlmsg_flags & NLM_F_EXCL)
 		return -EEXIST;
 	if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
 		return -EINVAL;
@@ -1128,7 +1133,7 @@ replay:
 	return err;
 
 create_n_graft:
-	if (!(n->nlmsg_flags&NLM_F_CREATE))
+	if (!(n->nlmsg_flags & NLM_F_CREATE))
 		return -ENOENT;
 	if (clid == TC_H_INGRESS) {
 		if (dev_ingress_queue(dev))
@@ -1234,16 +1239,19 @@ static int qdisc_notify(struct net *net, struct sk_buff *oskb,
 		return -ENOBUFS;
 
 	if (old && !tc_qdisc_dump_ignore(old)) {
-		if (tc_fill_qdisc(skb, old, clid, pid, n->nlmsg_seq, 0, RTM_DELQDISC) < 0)
+		if (tc_fill_qdisc(skb, old, clid, pid, n->nlmsg_seq,
+				  0, RTM_DELQDISC) < 0)
 			goto err_out;
 	}
 	if (new && !tc_qdisc_dump_ignore(new)) {
-		if (tc_fill_qdisc(skb, new, clid, pid, n->nlmsg_seq, old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
+		if (tc_fill_qdisc(skb, new, clid, pid, n->nlmsg_seq,
+				  old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
 			goto err_out;
 	}
 
 	if (skb->len)
-		return rtnetlink_send(skb, net, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+		return rtnetlink_send(skb, net, pid, RTNLGRP_TC,
+				      n->nlmsg_flags & NLM_F_ECHO);
 
 err_out:
 	kfree_skb(skb);
@@ -1275,7 +1283,7 @@ static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
 			q_idx++;
 			continue;
 		}
-		if (!tc_qdisc_dump_ignore(q) && 
+		if (!tc_qdisc_dump_ignore(q) &&
 		    tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
 				  cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
 			goto done;
@@ -1356,7 +1364,8 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 	u32 qid = TC_H_MAJ(clid);
 	int err;
 
-	if ((dev = __dev_get_by_index(net, tcm->tcm_ifindex)) == NULL)
+	dev = __dev_get_by_index(net, tcm->tcm_ifindex);
+	if (!dev)
 		return -ENODEV;
 
 	err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL);
@@ -1391,9 +1400,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 			qid = dev->qdisc->handle;
 
 		/* Now qid is genuine qdisc handle consistent
-		   both with parent and child.
-
-		   TC_H_MAJ(pid) still may be unspecified, complete it now.
+		 * both with parent and child.
+		 *
+		 * TC_H_MAJ(pid) still may be unspecified, complete it now.
 		 */
 		if (pid)
 			pid = TC_H_MAKE(qid, pid);
@@ -1403,7 +1412,8 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 	}
 
 	/* OK. Locate qdisc */
-	if ((q = qdisc_lookup(dev, qid)) == NULL)
+	q = qdisc_lookup(dev, qid);
+	if (!q)
 		return -ENOENT;
 
 	/* An check that it supports classes */
@@ -1423,13 +1433,14 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 
 	if (cl == 0) {
 		err = -ENOENT;
-		if (n->nlmsg_type != RTM_NEWTCLASS || !(n->nlmsg_flags&NLM_F_CREATE))
+		if (n->nlmsg_type != RTM_NEWTCLASS ||
+		    !(n->nlmsg_flags & NLM_F_CREATE))
 			goto out;
 	} else {
 		switch (n->nlmsg_type) {
 		case RTM_NEWTCLASS:
 			err = -EEXIST;
-			if (n->nlmsg_flags&NLM_F_EXCL)
+			if (n->nlmsg_flags & NLM_F_EXCL)
 				goto out;
 			break;
 		case RTM_DELTCLASS:
@@ -1521,14 +1532,14 @@ static int tclass_notify(struct net *net, struct sk_buff *oskb,
 		return -EINVAL;
 	}
 
-	return rtnetlink_send(skb, net, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+	return rtnetlink_send(skb, net, pid, RTNLGRP_TC,
+			      n->nlmsg_flags & NLM_F_ECHO);
 }
 
-struct qdisc_dump_args
-{
-	struct qdisc_walker w;
-	struct sk_buff *skb;
-	struct netlink_callback *cb;
+struct qdisc_dump_args {
+	struct qdisc_walker	w;
+	struct sk_buff		*skb;
+	struct netlink_callback	*cb;
 };
 
 static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walker *arg)
@@ -1590,7 +1601,7 @@ static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
 
 static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
 {
-	struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh);
+	struct tcmsg *tcm = (struct tcmsg *)NLMSG_DATA(cb->nlh);
 	struct net *net = sock_net(skb->sk);
 	struct netdev_queue *dev_queue;
 	struct net_device *dev;
@@ -1598,7 +1609,8 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
 
 	if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm)))
 		return 0;
-	if ((dev = dev_get_by_index(net, tcm->tcm_ifindex)) == NULL)
+	dev = dev_get_by_index(net, tcm->tcm_ifindex);
+	if (!dev)
 		return 0;
 
 	s_t = cb->args[0];
@@ -1621,19 +1633,22 @@ done:
 }
 
 /* Main classifier routine: scans classifier chain attached
-   to this qdisc, (optionally) tests for protocol and asks
-   specific classifiers.
+ * to this qdisc, (optionally) tests for protocol and asks
+ * specific classifiers.
  */
 int tc_classify_compat(struct sk_buff *skb, struct tcf_proto *tp,
 		       struct tcf_result *res)
 {
 	__be16 protocol = skb->protocol;
-	int err = 0;
+	int err;
 
 	for (; tp; tp = tp->next) {
-		if ((tp->protocol == protocol ||
-		     tp->protocol == htons(ETH_P_ALL)) &&
-		    (err = tp->classify(skb, tp, res)) >= 0) {
+		if (tp->protocol != protocol &&
+		    tp->protocol != htons(ETH_P_ALL))
+			continue;
+		err = tp->classify(skb, tp, res);
+
+		if (err >= 0) {
 #ifdef CONFIG_NET_CLS_ACT
 			if (err != TC_ACT_RECLASSIFY && skb->tc_verd)
 				skb->tc_verd = SET_TC_VERD(skb->tc_verd, 0);
@@ -1664,11 +1679,11 @@ reclassify:
 
 		if (verd++ >= MAX_REC_LOOP) {
 			if (net_ratelimit())
-				printk(KERN_NOTICE
-				       "%s: packet reclassify loop"
+				pr_notice("%s: packet reclassify loop"
 					  " rule prio %u protocol %02x\n",
-				       tp->q->ops->id,
-				       tp->prio & 0xffff, ntohs(tp->protocol));
+					  tp->q->ops->id,
+					  tp->prio & 0xffff,
+					  ntohs(tp->protocol));
 			return TC_ACT_SHOT;
 		}
 		skb->tc_verd = SET_TC_VERD(skb->tc_verd, verd);
@@ -1761,7 +1776,7 @@ static int __init pktsched_init(void)
 
 	err = register_pernet_subsys(&psched_net_ops);
 	if (err) {
-		printk(KERN_ERR "pktsched_init: "
+		pr_err("pktsched_init: "
 		       "cannot initialize per netns operations\n");
 		return err;
 	}