sch_atm.c
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上传日期:2013-02-24
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- /* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */
- /* Written 1998-2000 by Werner Almesberger, EPFL ICA */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/skbuff.h>
- #include <linux/interrupt.h>
- #include <linux/atmdev.h>
- #include <linux/atmclip.h>
- #include <linux/netdevice.h>
- #include <linux/rtnetlink.h>
- #include <linux/file.h> /* for fput */
- #include <net/pkt_sched.h>
- #include <net/sock.h>
- extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
- #define sockfd_put(sock) fput((sock)->file) /* @@@ copied because it's
- __inline__ in socket.c */
- #if 0 /* control */
- #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
- #else
- #define DPRINTK(format,args...)
- #endif
- #if 0 /* data */
- #define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args)
- #else
- #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.
- * Each class maps the flow(s) it is handling to a given VC. Multiple classes
- * may share the same VC.
- *
- * When creating a class, VCs are specified by passing the number of the open
- * socket descriptor by which the calling process references the VC. The kernel
- * keeps the VC open at least until all classes using it are removed.
- *
- * In this file, most functions are named atm_tc_* to avoid confusion with all
- * the atm_* in net/atm. This naming convention differs from what's used in the
- * rest of net/sched.
- *
- * Known bugs:
- * - sometimes messes up the IP stack
- * - any manipulations besides the few operations described in the README, are
- * untested and likely to crash the system
- * - should lock the flow while there is data in the queue (?)
- */
- #define PRIV(sch) ((struct atm_qdisc_data *) (sch)->data)
- #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 */
- struct atm_qdisc_data *parent; /* parent qdisc */
- struct socket *sock; /* for closing */
- u32 classid; /* x:y type ID */
- int ref; /* reference count */
- struct tc_stats stats;
- struct atm_flow_data *next;
- struct atm_flow_data *excess; /* flow for excess traffic;
- NULL to set CLP instead */
- int hdr_len;
- unsigned char hdr[0]; /* header data; MUST BE LAST */
- };
- struct atm_qdisc_data {
- struct atm_flow_data link; /* unclassified skbs go here */
- struct atm_flow_data *flows; /* NB: "link" is also on this
- list */
- 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;
- DPRINTK("find_flow: not foundn");
- return 0;
- }
- static __inline__ struct atm_flow_data *lookup_flow(struct Qdisc *sch,
- u32 classid)
- {
- struct atm_flow_data *flow;
- for (flow = PRIV(sch)->flows; flow; flow = flow->next)
- 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;
- *old = xchg(&flow->q,new);
- 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;
- DPRINTK("atm_tc_leaf(sch %p,flow %p)n",sch,flow);
- 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_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++;
- DPRINTK("atm_tc_get: flow %pn",flow);
- return (unsigned long) flow;
- }
- static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
- unsigned long parent, u32 classid)
- {
- return atm_tc_get(sch,classid);
- }
- static void destroy_filters(struct atm_flow_data *flow)
- {
- struct tcf_proto *filter;
- while ((filter = flow->filter_list)) {
- DPRINTK("destroy_filters: destroying filter %pn",filter);
- flow->filter_list = filter->next;
- filter->ops->destroy(filter);
- }
- }
- /*
- * atm_tc_put handles all destructions, including the ones that are explicitly
- * 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);
- struct atm_flow_data *flow = (struct atm_flow_data *) cl;
- struct atm_flow_data **prev;
- DPRINTK("atm_tc_put(sch %p,[qdisc %p],flow %p)n",sch,p,flow);
- if (--flow->ref) return;
- DPRINTK("atm_tc_put: destroyingn");
- for (prev = &p->flows; *prev; prev = &(*prev)->next)
- if (*prev == flow) break;
- if (!*prev) {
- printk(KERN_CRIT "atm_tc_put: class %p not foundn",flow);
- return;
- }
- *prev = flow->next;
- DPRINTK("atm_tc_put: qdisc %pn",flow->q);
- qdisc_destroy(flow->q);
- destroy_filters(flow);
- if (flow->sock) {
- DPRINTK("atm_tc_put: f_count %dn",
- file_count(flow->sock->file));
- 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 == &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;
- D2PRINTK("sch_atm_pop(vcc %p,skb %p,[qdisc %p])n",vcc,skb,p);
- VCC2FLOW(vcc)->old_pop(vcc,skb);
- tasklet_schedule(&p->task);
- }
- static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
- struct rtattr **tca, unsigned long *arg)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow = (struct atm_flow_data *) *arg;
- struct atm_flow_data *excess = NULL;
- struct rtattr *opt = tca[TCA_OPTIONS-1];
- struct rtattr *tb[TCA_ATM_MAX];
- struct socket *sock;
- int fd,error,hdr_len;
- void *hdr;
- DPRINTK("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
- "flow %p,opt %p)n",sch,p,classid,parent,flow,opt);
- /*
- * The concept of parents doesn't apply for this qdisc.
- */
- if (parent && parent != TC_H_ROOT && parent != sch->handle)
- return -EINVAL;
- /*
- * ATM classes cannot be changed. In order to change properties of the
- * ATM connection, that socket needs to be modified directly (via the
- * native ATM API. In order to send a flow to a different VC, the old
- * class needs to be removed and a new one added. (This may be changed
- * later.)
- */
- if (flow) return -EBUSY;
- if (opt == NULL || rtattr_parse(tb,TCA_ATM_MAX,RTA_DATA(opt),
- RTA_PAYLOAD(opt))) return -EINVAL;
- if (!tb[TCA_ATM_FD-1] || RTA_PAYLOAD(tb[TCA_ATM_FD-1]) < sizeof(fd))
- return -EINVAL;
- fd = *(int *) RTA_DATA(tb[TCA_ATM_FD-1]);
- DPRINTK("atm_tc_change: fd %dn",fd);
- if (tb[TCA_ATM_HDR-1]) {
- hdr_len = RTA_PAYLOAD(tb[TCA_ATM_HDR-1]);
- hdr = RTA_DATA(tb[TCA_ATM_HDR-1]);
- }
- else {
- hdr_len = RFC1483LLC_LEN;
- hdr = NULL; /* default LLC/SNAP for IP */
- }
- 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;
- }
- DPRINTK("atm_tc_change: type %d, payload %d, hdr_len %dn",
- opt->rta_type,RTA_PAYLOAD(opt),hdr_len);
- if (!(sock = sockfd_lookup(fd,&error))) return error; /* f_count++ */
- DPRINTK("atm_tc_change: f_count %dn",file_count(sock->file));
- if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
- error = -EPROTOTYPE;
- goto err_out;
- }
- /* @@@ should check if the socket is really operational or we'll crash
- on vcc->send */
- if (classid) {
- if (TC_H_MAJ(classid ^ sch->handle)) {
- DPRINTK("atm_tc_change: classid mismatchn");
- error = -EINVAL;
- goto err_out;
- }
- if (find_flow(p,flow)) {
- error = -EEXIST;
- goto err_out;
- }
- }
- 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;
- atm_tc_put(sch,cl);
- }
- }
- DPRINTK("atm_tc_change: new id %xn",classid);
- flow = kmalloc(sizeof(struct atm_flow_data)+hdr_len,GFP_KERNEL);
- DPRINTK("atm_tc_change: flow %pn",flow);
- if (!flow) {
- error = -ENOBUFS;
- goto err_out;
- }
- memset(flow,0,sizeof(*flow));
- flow->filter_list = NULL;
- if (!(flow->q = qdisc_create_dflt(sch->dev,&pfifo_qdisc_ops)))
- flow->q = &noop_qdisc;
- DPRINTK("atm_tc_change: qdisc %pn",flow->q);
- flow->sock = sock;
- flow->vcc = ATM_SD(sock); /* speedup */
- flow->vcc->user_back = flow;
- DPRINTK("atm_tc_change: vcc %pn",flow->vcc);
- flow->old_pop = flow->vcc->pop;
- flow->parent = p;
- flow->vcc->pop = sch_atm_pop;
- flow->classid = classid;
- flow->ref = 1;
- flow->excess = excess;
- flow->next = p->link.next;
- p->link.next = flow;
- flow->hdr_len = hdr_len;
- if (hdr) memcpy(flow->hdr,hdr,hdr_len);
- else {
- memcpy(flow->hdr,llc_oui,sizeof(llc_oui));
- ((u16 *) flow->hdr)[3] = htons(ETH_P_IP);
- }
- *arg = (unsigned long) flow;
- return 0;
- err_out:
- 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;
- /*
- * Reference count must be 2: one for "keepalive" (set at class
- * creation), and one for the reference held when calling delete.
- */
- if (flow->ref < 2) {
- printk(KERN_ERR "atm_tc_delete: flow->ref == %dn",flow->ref);
- return -EINVAL;
- }
- 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;
- for (flow = p->flows; flow; flow = flow->next) {
- if (walker->count >= walker->skip)
- if (walker->fn(sch,(unsigned long) flow,walker) < 0) {
- walker->stop = 1;
- break;
- }
- walker->count++;
- }
- }
- static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch,unsigned long cl)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow = (struct atm_flow_data *) cl;
- DPRINTK("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)n",sch,p,flow);
- 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);
- struct atm_flow_data *flow = NULL ; /* @@@ */
- struct tcf_result res;
- int result;
- int ret = NET_XMIT_POLICED;
- D2PRINTK("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])n",skb,sch,p);
- result = TC_POLICE_OK; /* be nice to gcc */
- if (TC_H_MAJ(skb->priority) != sch->handle ||
- !(flow = (struct atm_flow_data *) atm_tc_get(sch,skb->priority)))
- for (flow = p->flows; flow; flow = flow->next)
- if (flow->filter_list) {
- result = tc_classify(skb,flow->filter_list,
- &res);
- if (result < 0) continue;
- flow = (struct atm_flow_data *) res.class;
- if (!flow) flow = lookup_flow(sch,res.classid);
- break;
- }
- if (!flow) flow = &p->link;
- else {
- if (flow->vcc)
- ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
- /*@@@ looks good ... but it's not supposed to work :-)*/
- #ifdef CONFIG_NET_CLS_POLICE
- switch (result) {
- case TC_POLICE_SHOT:
- kfree_skb(skb);
- break;
- case TC_POLICE_RECLASSIFY:
- if (flow->excess) flow = flow->excess;
- else {
- ATM_SKB(skb)->atm_options |=
- ATM_ATMOPT_CLP;
- break;
- }
- /* fall through */
- case TC_POLICE_OK:
- /* fall through */
- default:
- break;
- }
- #endif
- }
- if (
- #ifdef CONFIG_NET_CLS_POLICE
- result == TC_POLICE_SHOT ||
- #endif
- (ret = flow->q->enqueue(skb,flow->q)) != 0) {
- sch->stats.drops++;
- if (flow) flow->stats.drops++;
- return ret;
- }
- sch->stats.bytes += skb->len;
- sch->stats.packets++;
- flow->stats.bytes += skb->len;
- flow->stats.packets++;
- /*
- * Okay, this may seem weird. We pretend we've dropped the packet if
- * it goes via ATM. The reason for this is that the outer qdisc
- * expects to be able to q->dequeue the packet later on if we return
- * success at this place. Also, sch->q.qdisc needs to reflect whether
- * there is a packet egligible for dequeuing or not. Note that the
- * statistics of the outer qdisc are necessarily wrong because of all
- * this. There's currently no correct solution for this.
- */
- if (flow == &p->link) {
- sch->q.qlen++;
- return 0;
- }
- tasklet_schedule(&p->task);
- 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
- * uses its own channels, which have nothing to do with any CLIP/LANE/or
- * non-ATM interfaces.
- */
- static void sch_atm_dequeue(unsigned long data)
- {
- struct Qdisc *sch = (struct Qdisc *) data;
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow;
- struct sk_buff *skb;
- D2PRINTK("sch_atm_dequeue(sch %p,[qdisc %p])n",sch,p);
- for (flow = p->link.next; flow; flow = flow->next)
- /*
- * If traffic is properly shaped, this won't generate nasty
- * little bursts. Otherwise, it may ... (but that's okay)
- */
- while ((skb = flow->q->dequeue(flow->q))) {
- if (!atm_may_send(flow->vcc,skb->truesize)) {
- (void) flow->q->ops->requeue(skb,flow->q);
- break;
- }
- D2PRINTK("atm_tc_deqeueue: sending on class %pn",flow);
- /* remove any LL header somebody else has attached */
- skb_pull(skb,(char *) skb->nh.iph-(char *) skb->data);
- if (skb_headroom(skb) < flow->hdr_len) {
- struct sk_buff *new;
- new = skb_realloc_headroom(skb,flow->hdr_len);
- dev_kfree_skb(skb);
- if (!new) continue;
- skb = new;
- }
- D2PRINTK("sch_atm_dequeue: ip %p, data %pn",
- skb->nh.iph,skb->data);
- ATM_SKB(skb)->vcc = flow->vcc;
- memcpy(skb_push(skb,flow->hdr_len),flow->hdr,
- flow->hdr_len);
- atomic_add(skb->truesize,&flow->vcc->tx_inuse);
- ATM_SKB(skb)->iovcnt = 0;
- /* atm.atm_options are already set by atm_tc_enqueue */
- (void) flow->vcc->send(flow->vcc,skb);
- }
- }
- static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct sk_buff *skb;
- 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--;
- return skb;
- }
- static int atm_tc_requeue(struct sk_buff *skb,struct Qdisc *sch)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- int ret;
- D2PRINTK("atm_tc_requeue(skb %p,sch %p,[qdisc %p])n",skb,sch,p);
- ret = p->link.q->ops->requeue(skb,p->link.q);
- if (!ret) sch->q.qlen++;
- else {
- sch->stats.drops++;
- p->link.stats.drops++;
- }
- return ret;
- }
- static int atm_tc_drop(struct Qdisc *sch)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow;
- DPRINTK("atm_tc_drop(sch %p,[qdisc %p])n",sch,p);
- for (flow = p->flows; flow; flow = flow->next)
- if (flow->q->ops->drop && flow->q->ops->drop(flow->q))
- return 1;
- return 0;
- }
- static int atm_tc_init(struct Qdisc *sch,struct rtattr *opt)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- DPRINTK("atm_tc_init(sch %p,[qdisc %p],opt %p)n",sch,p,opt);
- memset(p,0,sizeof(*p));
- p->flows = &p->link;
- if(!(p->link.q = qdisc_create_dflt(sch->dev,&pfifo_qdisc_ops)))
- p->link.q = &noop_qdisc;
- DPRINTK("atm_tc_init: link (%p) qdisc %pn",&p->link,p->link.q);
- p->link.filter_list = NULL;
- p->link.vcc = NULL;
- p->link.sock = NULL;
- p->link.classid = sch->handle;
- p->link.ref = 1;
- p->link.next = NULL;
- tasklet_init(&p->task,sch_atm_dequeue,(unsigned long) sch);
- MOD_INC_USE_COUNT;
- 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);
- sch->q.qlen = 0;
- }
- static void atm_tc_destroy(struct Qdisc *sch)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow;
- DPRINTK("atm_tc_destroy(sch %p,[qdisc %p])n",sch,p);
- /* races ? */
- while ((flow = p->flows)) {
- destroy_filters(flow);
- if (flow->ref > 1)
- printk(KERN_ERR "atm_destroy: %p->ref = %dn",flow,
- flow->ref);
- atm_tc_put(sch,(unsigned long) flow);
- if (p->flows == flow) {
- printk(KERN_ERR "atm_destroy: putting flow %p didn't "
- "kill itn",flow);
- p->flows = flow->next; /* brute force */
- break;
- }
- }
- tasklet_kill(&p->task);
- MOD_DEC_USE_COUNT;
- }
- static int atm_tc_dump_class(struct Qdisc *sch, unsigned long cl,
- struct sk_buff *skb, struct tcmsg *tcm)
- {
- struct atm_qdisc_data *p = PRIV(sch);
- struct atm_flow_data *flow = (struct atm_flow_data *) cl;
- unsigned char *b = skb->tail;
- struct rtattr *rta;
- 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;
- tcm->tcm_handle = flow->classid;
- rta = (struct rtattr *) b;
- RTA_PUT(skb,TCA_OPTIONS,0,NULL);
- RTA_PUT(skb,TCA_ATM_HDR,flow->hdr_len,flow->hdr);
- if (flow->vcc) {
- struct sockaddr_atmpvc pvc;
- int state;
- pvc.sap_family = AF_ATMPVC;
- pvc.sap_addr.itf = flow->vcc->dev ? flow->vcc->dev->number : -1;
- pvc.sap_addr.vpi = flow->vcc->vpi;
- pvc.sap_addr.vci = flow->vcc->vci;
- RTA_PUT(skb,TCA_ATM_ADDR,sizeof(pvc),&pvc);
- state = ATM_VF2VS(flow->vcc->flags);
- RTA_PUT(skb,TCA_ATM_STATE,sizeof(state),&state);
- }
- if (flow->excess)
- RTA_PUT(skb,TCA_ATM_EXCESS,sizeof(u32),&flow->classid);
- else {
- static u32 zero = 0;
- RTA_PUT(skb,TCA_ATM_EXCESS,sizeof(zero),&zero);
- }
- rta->rta_len = skb->tail-b;
- return skb->len;
- rtattr_failure:
- skb_trim(skb,b-skb->data);
- return -1;
- }
- static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb)
- {
- return 0;
- }
- static struct Qdisc_class_ops atm_class_ops =
- {
- atm_tc_graft, /* graft */
- atm_tc_leaf, /* leaf */
- atm_tc_get, /* get */
- atm_tc_put, /* put */
- atm_tc_change, /* change */
- atm_tc_delete, /* delete */
- atm_tc_walk, /* walk */
- atm_tc_find_tcf, /* tcf_chain */
- atm_tc_bind_filter, /* bind_tcf */
- atm_tc_put, /* unbind_tcf */
- atm_tc_dump_class, /* dump */
- };
- struct Qdisc_ops atm_qdisc_ops =
- {
- NULL, /* next */
- &atm_class_ops, /* cl_ops */
- "atm",
- sizeof(struct atm_qdisc_data),
- atm_tc_enqueue, /* enqueue */
- atm_tc_dequeue, /* dequeue */
- atm_tc_requeue, /* requeue */
- atm_tc_drop, /* drop */
- atm_tc_init, /* init */
- atm_tc_reset, /* reset */
- atm_tc_destroy, /* destroy */
- NULL, /* change */
- atm_tc_dump /* dump */
- };
- #ifdef MODULE
- int init_module(void)
- {
- return register_qdisc(&atm_qdisc_ops);
- }
- void cleanup_module(void)
- {
- unregister_qdisc(&atm_qdisc_ops);
- }
- #endif