diff options
Diffstat (limited to 'net/sched/sch_atm.c')
| -rw-r--r-- | net/sched/sch_atm.c | 735 |
1 files changed, 735 insertions, 0 deletions
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c new file mode 100644 index 000000000000..93ebce40acac --- /dev/null +++ b/net/sched/sch_atm.c @@ -0,0 +1,735 @@ +/* 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/init.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 */ + +#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) 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 */ + struct atm_qdisc_data *parent; /* parent qdisc */ + struct socket *sock; /* for closing */ + u32 classid; /* x:y type ID */ + int ref; /* reference count */ + struct gnet_stats_basic bstats; + struct gnet_stats_queue qstats; + spinlock_t *stats_lock; + 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 found\n"); + return 0; +} + + +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; + 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 %p\n",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 %p\n",filter); + flow->filter_list = filter->next; + tcf_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: destroying\n"); + for (prev = &p->flows; *prev; prev = &(*prev)->next) + if (*prev == flow) break; + if (!*prev) { + printk(KERN_CRIT "atm_tc_put: class %p not found\n",flow); + return; + } + *prev = flow->next; + DPRINTK("atm_tc_put: qdisc %p\n",flow->q); + qdisc_destroy(flow->q); + destroy_filters(flow); + if (flow->sock) { + DPRINTK("atm_tc_put: f_count %d\n", + 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 const u8 llc_oui_ip[] = { + 0xaa, /* DSAP: non-ISO */ + 0xaa, /* SSAP: non-ISO */ + 0x03, /* Ctrl: Unnumbered Information Command PDU */ + 0x00, /* OUI: EtherType */ + 0x00, 0x00, + 0x08, 0x00 }; /* Ethertype IP (0800) */ + +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_nested(tb, TCA_ATM_MAX, 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 %d\n",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 %d\n", + opt->rta_type,RTA_PAYLOAD(opt),hdr_len); + 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; + 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 mismatch\n"); + 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 %x\n",classid); + flow = kmalloc(sizeof(struct atm_flow_data)+hdr_len,GFP_KERNEL); + DPRINTK("atm_tc_change: flow %p\n",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 %p\n",flow->q); + flow->sock = sock; + flow->vcc = ATM_SD(sock); /* speedup */ + flow->vcc->user_back = flow; + DPRINTK("atm_tc_change: vcc %p\n",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_ip,sizeof(llc_oui_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 == %d\n",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->qstats.drops++; + if (flow) flow->qstats.drops++; + return ret; + } + sch->bstats.bytes += skb->len; + sch->bstats.packets++; + flow->bstats.bytes += skb->len; + flow->bstats.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_dequeue: sending on class %p\n",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 %p\n", + 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, + &sk_atm(flow->vcc)->sk_wmem_alloc); + /* 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++; + sch->qstats.requeues++; + } else { + sch->qstats.drops++; + p->link.qstats.drops++; + } + return ret; +} + + +static unsigned int atm_tc_drop(struct Qdisc *sch) +{ + struct atm_qdisc_data *p = PRIV(sch); + struct atm_flow_data *flow; + unsigned int len; + + DPRINTK("atm_tc_drop(sch %p,[qdisc %p])\n",sch,p); + for (flow = p->flows; flow; flow = flow->next) + if (flow->q->ops->drop && (len = flow->q->ops->drop(flow->q))) + return len; + 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); + 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 %p\n",&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); + 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 = %d\n",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 it\n",flow); + p->flows = flow->next; /* brute force */ + break; + } + } + tasklet_kill(&p->task); +} + + +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; + + 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_class_stats(struct Qdisc *sch, unsigned long arg, + struct gnet_dump *d) +{ + struct atm_flow_data *flow = (struct atm_flow_data *) arg; + + flow->qstats.qlen = flow->q->q.qlen; + + if (gnet_stats_copy_basic(d, &flow->bstats) < 0 || + gnet_stats_copy_queue(d, &flow->qstats) < 0) + return -1; + + return 0; +} + +static int atm_tc_dump(struct Qdisc *sch, struct sk_buff *skb) +{ + return 0; +} + +static struct Qdisc_class_ops atm_class_ops = { + .graft = atm_tc_graft, + .leaf = atm_tc_leaf, + .get = atm_tc_get, + .put = atm_tc_put, + .change = atm_tc_change, + .delete = atm_tc_delete, + .walk = atm_tc_walk, + .tcf_chain = atm_tc_find_tcf, + .bind_tcf = atm_tc_bind_filter, + .unbind_tcf = atm_tc_put, + .dump = atm_tc_dump_class, + .dump_stats = atm_tc_dump_class_stats, +}; + +static struct Qdisc_ops atm_qdisc_ops = { + .next = NULL, + .cl_ops = &atm_class_ops, + .id = "atm", + .priv_size = sizeof(struct atm_qdisc_data), + .enqueue = atm_tc_enqueue, + .dequeue = atm_tc_dequeue, + .requeue = atm_tc_requeue, + .drop = atm_tc_drop, + .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); +} + +static void __exit atm_exit(void) +{ + unregister_qdisc(&atm_qdisc_ops); +} + +module_init(atm_init) +module_exit(atm_exit) +MODULE_LICENSE("GPL"); |