[NET_SCHED]: sch_atm: Lindent (b0188d4d) · Commits · e / devices / android_kernel_oneplus_sm7250

net/sched/sch_atm.c

+232 −236

Original line number	Diff line number	Diff line
		@@ -2,7 +2,6 @@

		/* Written 1998-2000 by Werner Almesberger, EPFL ICA */


		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/string.h>
		@@ -15,7 +14,6 @@
		#include <net/netlink.h>
		#include <net/pkt_sched.h>


		extern struct socket sockfd_lookup(int fd, int err); /* @@@ fix this */

		#if 0 /* control */
		@@ -30,7 +28,6 @@ extern struct socket sockfd_lookup(int fd, int err); /* @@@ fix this */
		#define D2PRINTK(format,args...)
		#endif


		/*
		* The ATM queuing discipline provides a framework for invoking classifiers
		* (aka "filters"), which in turn select classes of this queuing discipline.
		@@ -52,16 +49,15 @@ extern struct socket sockfd_lookup(int fd, int err); /* @@@ fix this */
		* - should lock the flow while there is data in the queue (?)
		*/


		#define PRIV(sch) qdisc_priv(sch)
		#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))


		struct atm_flow_data {
		struct Qdisc q; / FIFO, TBF, etc. */
		struct tcf_proto *filter_list;
		struct atm_vcc vcc; / VCC; NULL if VCC is closed */
		void (old_pop)(struct atm_vcc vcc,struct sk_buff skb); / chaining */
		void (old_pop)(struct atm_vcc vcc,
		struct sk_buff * skb); /* chaining */
		struct atm_qdisc_data parent; / parent qdisc */
		struct socket sock; / for closing */
		u32 classid; /* x:y type ID */
		@@ -82,50 +78,49 @@ struct atm_qdisc_data {
		struct tasklet_struct task; /* requeue tasklet */
		};


		/* ------------------------- Class/flow operations ------------------------- */


		static int find_flow(struct atm_qdisc_data qdisc, struct atm_flow_data flow)
		{
		struct atm_flow_data *walk;

		DPRINTK("find_flow(qdisc %p,flow %p)\n", qdisc, flow);
		for (walk = qdisc->flows; walk; walk = walk->next)
		if (walk == flow) return 1;
		if (walk == flow)
		return 1;
		DPRINTK("find_flow: not found\n");
		return 0;
		}


		static __inline__ struct atm_flow_data lookup_flow(struct Qdisc sch,
		u32 classid)
		static inline struct atm_flow_data lookup_flow(struct Qdisc sch, u32 classid)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		struct atm_flow_data *flow;

		for (flow = p->flows; flow; flow = flow->next)
		if (flow->classid == classid) break;
		if (flow->classid == classid)
		break;
		return flow;
		}


		static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
		struct Qdisc new, struct Qdisc *old)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		struct atm_flow_data flow = (struct atm_flow_data )arg;

		DPRINTK("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",sch,
		p,flow,new,old);
		if (!find_flow(p,flow)) return -EINVAL;
		if (!new) new = &noop_qdisc;
		DPRINTK("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
		sch, p, flow, new, old);
		if (!find_flow(p, flow))
		return -EINVAL;
		if (!new)
		new = &noop_qdisc;
		*old = xchg(&flow->q, new);
		if (old) qdisc_reset(old);
		if (*old)
		qdisc_reset(*old);
		return 0;
		}


		static struct Qdisc atm_tc_leaf(struct Qdisc sch, unsigned long cl)
		{
		struct atm_flow_data flow = (struct atm_flow_data )cl;
		@@ -134,20 +129,19 @@ static struct Qdisc atm_tc_leaf(struct Qdisc sch,unsigned long cl)
		return flow ? flow->q : NULL;
		}


		static unsigned long atm_tc_get(struct Qdisc *sch, u32 classid)
		{
		struct atm_qdisc_data *p __attribute__((unused)) = PRIV(sch);
		struct atm_qdisc_data *p __maybe_unused = PRIV(sch);
		struct atm_flow_data *flow;

		DPRINTK("atm_tc_get(sch %p,[qdisc %p],classid %x)\n", sch, p, classid);
		flow = lookup_flow(sch, classid);
		if (flow) flow->ref++;
		if (flow)
		flow->ref++;
		DPRINTK("atm_tc_get: flow %p\n", flow);
		return (unsigned long)flow;
		}


		static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
		unsigned long parent, u32 classid)
		{
		@@ -159,7 +153,6 @@ static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
		* requested (atm_tc_destroy, etc.). The assumption here is that we never drop
		* anything that still seems to be in use.
		*/

		static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -167,10 +160,12 @@ static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
		struct atm_flow_data **prev;

		DPRINTK("atm_tc_put(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
		if (--flow->ref) return;
		if (--flow->ref)
		return;
		DPRINTK("atm_tc_put: destroying\n");
		for (prev = &p->flows; prev; prev = &(prev)->next)
		if (*prev == flow) break;
		if (*prev == flow)
		break;
		if (!*prev) {
		printk(KERN_CRIT "atm_tc_put: class %p not found\n", flow);
		return;
		@@ -185,15 +180,16 @@ static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
		flow->vcc->pop = flow->old_pop;
		sockfd_put(flow->sock);
		}
		if (flow->excess) atm_tc_put(sch,(unsigned long) flow->excess);
		if (flow != &p->link) kfree(flow);
		if (flow->excess)
		atm_tc_put(sch, (unsigned long)flow->excess);
		if (flow != &p->link)
		kfree(flow);
		/*
		* If flow == &p->link, the qdisc no longer works at this point and
		* needs to be removed. (By the caller of atm_tc_put.)
		*/
		}


		static void sch_atm_pop(struct atm_vcc vcc, struct sk_buff skb)
		{
		struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
		@@ -209,7 +205,8 @@ static const u8 llc_oui_ip[] = {
		0x03, /* Ctrl: Unnumbered Information Command PDU */
		0x00, /* OUI: EtherType */
		0x00, 0x00,
		0x08, 0x00 }; /* Ethertype IP (0800) */
		0x08, 0x00
		}; /* Ethertype IP (0800) */

		static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
		struct rtattr *tca, unsigned long arg)
		@@ -237,7 +234,8 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
		* class needs to be removed and a new one added. (This may be changed
		* later.)
		*/
		if (flow) return -EBUSY;
		if (flow)
		return -EBUSY;
		if (opt == NULL \|\| rtattr_parse_nested(tb, TCA_ATM_MAX, opt))
		return -EINVAL;
		if (!tb[TCA_ATM_FD - 1] \|\| RTA_PAYLOAD(tb[TCA_ATM_FD - 1]) < sizeof(fd))
		@@ -247,22 +245,24 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
		if (tb[TCA_ATM_HDR - 1]) {
		hdr_len = RTA_PAYLOAD(tb[TCA_ATM_HDR - 1]);
		hdr = RTA_DATA(tb[TCA_ATM_HDR - 1]);
		}
		else {
		} else {
		hdr_len = RFC1483LLC_LEN;
		hdr = NULL; /* default LLC/SNAP for IP */
		}
		if (!tb[TCA_ATM_EXCESS-1]) excess = NULL;
		if (!tb[TCA_ATM_EXCESS - 1])
		excess = NULL;
		else {
		if (RTA_PAYLOAD(tb[TCA_ATM_EXCESS - 1]) != sizeof(u32))
		return -EINVAL;
		excess = (struct atm_flow_data *) atm_tc_get(sch,
		(u32 ) RTA_DATA(tb[TCA_ATM_EXCESS-1]));
		if (!excess) return -ENOENT;
		excess = (struct atm_flow_data *)
		atm_tc_get(sch, (u32 )RTA_DATA(tb[TCA_ATM_EXCESS - 1]));
		if (!excess)
		return -ENOENT;
		}
		DPRINTK("atm_tc_change: type %d, payload %d, hdr_len %d\n",
		opt->rta_type, RTA_PAYLOAD(opt), hdr_len);
		if (!(sock = sockfd_lookup(fd,&error))) return error; /* f_count++ */
		if (!(sock = sockfd_lookup(fd, &error)))
		return error; /* f_count++ */
		DPRINTK("atm_tc_change: f_count %d\n", file_count(sock->file));
		if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
		error = -EPROTOTYPE;
		@@ -280,14 +280,14 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
		error = -EEXIST;
		goto err_out;
		}
		}
		else {
		} else {
		int i;
		unsigned long cl;

		for (i = 1; i < 0x8000; i++) {
		classid = TC_H_MAKE(sch->handle, 0x8000 \| i);
		if (!(cl = atm_tc_get(sch,classid))) break;
		if (!(cl = atm_tc_get(sch, classid)))
		break;
		atm_tc_put(sch, cl);
		}
		}
		@@ -323,20 +323,22 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
		*arg = (unsigned long)flow;
		return 0;
		err_out:
		if (excess) atm_tc_put(sch,(unsigned long) excess);
		if (excess)
		atm_tc_put(sch, (unsigned long)excess);
		sockfd_put(sock);
		return error;
		}


		static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		struct atm_flow_data flow = (struct atm_flow_data )arg;

		DPRINTK("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
		if (!find_flow(PRIV(sch),flow)) return -EINVAL;
		if (flow->filter_list \|\| flow == &p->link) return -EBUSY;
		if (!find_flow(PRIV(sch), flow))
		return -EINVAL;
		if (flow->filter_list \|\| flow == &p->link)
		return -EBUSY;
		/*
		* Reference count must be 2: one for "keepalive" (set at class
		* creation), and one for the reference held when calling delete.
		@@ -345,19 +347,20 @@ static int atm_tc_delete(struct Qdisc *sch,unsigned long arg)
		printk(KERN_ERR "atm_tc_delete: flow->ref == %d\n", flow->ref);
		return -EINVAL;
		}
		if (flow->ref > 2) return -EBUSY; /* catch references via excess, etc.*/
		if (flow->ref > 2)
		return -EBUSY; /* catch references via excess, etc. */
		atm_tc_put(sch, arg);
		return 0;
		}


		static void atm_tc_walk(struct Qdisc sch, struct qdisc_walker walker)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		struct atm_flow_data *flow;

		DPRINTK("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker);
		if (walker->stop) return;
		if (walker->stop)
		return;
		for (flow = p->flows; flow; flow = flow->next) {
		if (walker->count >= walker->skip)
		if (walker->fn(sch, (unsigned long)flow, walker) < 0) {
		@@ -368,7 +371,6 @@ static void atm_tc_walk(struct Qdisc sch,struct qdisc_walker walker)
		}
		}


		static struct tcf_proto *atm_tc_find_tcf(struct Qdisc sch, unsigned long cl)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -378,10 +380,8 @@ static struct tcf_proto *atm_tc_find_tcf(struct Qdisc sch,unsigned long cl)
		return flow ? &flow->filter_list : &p->link.filter_list;
		}


		/* --------------------------- Qdisc operations ---------------------------- */


		static int atm_tc_enqueue(struct sk_buff skb, struct Qdisc sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -398,12 +398,15 @@ static int atm_tc_enqueue(struct sk_buff skb,struct Qdisc sch)
		if (flow->filter_list) {
		result = tc_classify(skb, flow->filter_list,
		&res);
		if (result < 0) continue;
		if (result < 0)
		continue;
		flow = (struct atm_flow_data *)res.class;
		if (!flow) flow = lookup_flow(sch,res.classid);
		if (!flow)
		flow = lookup_flow(sch, res.classid);
		break;
		}
		if (!flow) flow = &p->link;
		if (!flow)
		flow = &p->link;
		else {
		if (flow->vcc)
		ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
		@@ -414,10 +417,10 @@ static int atm_tc_enqueue(struct sk_buff skb,struct Qdisc sch)
		kfree_skb(skb);
		break;
		case TC_POLICE_RECLASSIFY:
		if (flow->excess) flow = flow->excess;
		if (flow->excess)
		flow = flow->excess;
		else {
		ATM_SKB(skb)->atm_options \|=
		ATM_ATMOPT_CLP;
		ATM_SKB(skb)->atm_options \|= ATM_ATMOPT_CLP;
		break;
		}
		/* fall through */
		@@ -434,7 +437,8 @@ static int atm_tc_enqueue(struct sk_buff skb,struct Qdisc sch)
		#endif
		(ret = flow->q->enqueue(skb, flow->q)) != 0) {
		sch->qstats.drops++;
		if (flow) flow->qstats.drops++;
		if (flow)
		flow->qstats.drops++;
		return ret;
		}
		sch->bstats.bytes += skb->len;
		@@ -458,7 +462,6 @@ static int atm_tc_enqueue(struct sk_buff skb,struct Qdisc sch)
		return NET_XMIT_BYPASS;
		}


		/*
		* Dequeue packets and send them over ATM. Note that we quite deliberately
		* avoid checking net_device's flow control here, simply because sch_atm
		@@ -466,7 +469,6 @@ static int atm_tc_enqueue(struct sk_buff skb,struct Qdisc sch)
		* non-ATM interfaces.
		*/


		static void sch_atm_dequeue(unsigned long data)
		{
		struct Qdisc sch = (struct Qdisc )data;
		@@ -493,7 +495,8 @@ static void sch_atm_dequeue(unsigned long data)

		new = skb_realloc_headroom(skb, flow->hdr_len);
		dev_kfree_skb(skb);
		if (!new) continue;
		if (!new)
		continue;
		skb = new;
		}
		D2PRINTK("sch_atm_dequeue: ip %p, data %p\n",
		@@ -504,11 +507,10 @@ static void sch_atm_dequeue(unsigned long data)
		atomic_add(skb->truesize,
		&sk_atm(flow->vcc)->sk_wmem_alloc);
		/* atm.atm_options are already set by atm_tc_enqueue */
		(void) flow->vcc->send(flow->vcc,skb);
		flow->vcc->send(flow->vcc, skb);
		}
		}


		static struct sk_buff atm_tc_dequeue(struct Qdisc sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -517,11 +519,11 @@ static struct sk_buff atm_tc_dequeue(struct Qdisc sch)
		D2PRINTK("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
		tasklet_schedule(&p->task);
		skb = p->link.q->dequeue(p->link.q);
		if (skb) sch->q.qlen--;
		if (skb)
		sch->q.qlen--;
		return skb;
		}


		static int atm_tc_requeue(struct sk_buff skb, struct Qdisc sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -539,7 +541,6 @@ static int atm_tc_requeue(struct sk_buff skb,struct Qdisc sch)
		return ret;
		}


		static unsigned int atm_tc_drop(struct Qdisc *sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -553,7 +554,6 @@ static unsigned int atm_tc_drop(struct Qdisc *sch)
		return 0;
		}


		static int atm_tc_init(struct Qdisc sch, struct rtattr opt)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -574,18 +574,17 @@ static int atm_tc_init(struct Qdisc sch,struct rtattr opt)
		return 0;
		}


		static void atm_tc_reset(struct Qdisc *sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		struct atm_flow_data *flow;

		DPRINTK("atm_tc_reset(sch %p,[qdisc %p])\n", sch, p);
		for (flow = p->flows; flow; flow = flow->next) qdisc_reset(flow->q);
		for (flow = p->flows; flow; flow = flow->next)
		qdisc_reset(flow->q);
		sch->q.qlen = 0;
		}


		static void atm_tc_destroy(struct Qdisc *sch)
		{
		struct atm_qdisc_data *p = PRIV(sch);
		@@ -610,7 +609,6 @@ static void atm_tc_destroy(struct Qdisc *sch)
		tasklet_kill(&p->task);
		}


		static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
		struct sk_buff skb, struct tcmsg tcm)
		{
		@@ -621,7 +619,8 @@ static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,

		DPRINTK("atm_tc_dump_class(sch %p,[qdisc %p],flow %p,skb %p,tcm %p)\n",
		sch, p, flow, skb, tcm);
		if (!find_flow(p,flow)) return -EINVAL;
		if (!find_flow(p, flow))
		return -EINVAL;
		tcm->tcm_handle = flow->classid;
		tcm->tcm_info = flow->q->handle;
		rta = (struct rtattr *)b;
		@@ -689,7 +688,6 @@ static struct Qdisc_class_ops atm_class_ops = {
		};

		static struct Qdisc_ops atm_qdisc_ops = {
		.next = NULL,
		.cl_ops = &atm_class_ops,
		.id = "atm",
		.priv_size = sizeof(struct atm_qdisc_data),
		@@ -700,12 +698,10 @@ static struct Qdisc_ops atm_qdisc_ops = {
		.init = atm_tc_init,
		.reset = atm_tc_reset,
		.destroy = atm_tc_destroy,
		.change = NULL,
		.dump = atm_tc_dump,
		.owner = THIS_MODULE,
		};


		static int __init atm_init(void)
		{
		return register_qdisc(&atm_qdisc_ops);