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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
736 lines
20 KiB
C
736 lines
20 KiB
C
/* net/sched/sch_atm.c - ATM VC selection "queueing discipline" */
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/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/interrupt.h>
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#include <linux/atmdev.h>
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#include <linux/atmclip.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/file.h> /* for fput */
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#include <net/pkt_sched.h>
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#include <net/sock.h>
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extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
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#if 0 /* control */
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#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
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#else
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#define DPRINTK(format,args...)
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#endif
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#if 0 /* data */
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#define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args)
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#else
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#define D2PRINTK(format,args...)
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#endif
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/*
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* The ATM queuing discipline provides a framework for invoking classifiers
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* (aka "filters"), which in turn select classes of this queuing discipline.
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* Each class maps the flow(s) it is handling to a given VC. Multiple classes
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* may share the same VC.
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*
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* When creating a class, VCs are specified by passing the number of the open
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* socket descriptor by which the calling process references the VC. The kernel
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* keeps the VC open at least until all classes using it are removed.
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*
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* In this file, most functions are named atm_tc_* to avoid confusion with all
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* the atm_* in net/atm. This naming convention differs from what's used in the
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* rest of net/sched.
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*
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* Known bugs:
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* - sometimes messes up the IP stack
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* - any manipulations besides the few operations described in the README, are
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* untested and likely to crash the system
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* - should lock the flow while there is data in the queue (?)
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*/
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#define PRIV(sch) qdisc_priv(sch)
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#define VCC2FLOW(vcc) ((struct atm_flow_data *) ((vcc)->user_back))
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struct atm_flow_data {
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struct Qdisc *q; /* FIFO, TBF, etc. */
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struct tcf_proto *filter_list;
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struct atm_vcc *vcc; /* VCC; NULL if VCC is closed */
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void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* chaining */
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struct atm_qdisc_data *parent; /* parent qdisc */
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struct socket *sock; /* for closing */
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u32 classid; /* x:y type ID */
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int ref; /* reference count */
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struct gnet_stats_basic bstats;
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struct gnet_stats_queue qstats;
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spinlock_t *stats_lock;
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struct atm_flow_data *next;
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struct atm_flow_data *excess; /* flow for excess traffic;
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NULL to set CLP instead */
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int hdr_len;
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unsigned char hdr[0]; /* header data; MUST BE LAST */
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};
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struct atm_qdisc_data {
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struct atm_flow_data link; /* unclassified skbs go here */
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struct atm_flow_data *flows; /* NB: "link" is also on this
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list */
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struct tasklet_struct task; /* requeue tasklet */
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};
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/* ------------------------- Class/flow operations ------------------------- */
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static int find_flow(struct atm_qdisc_data *qdisc,struct atm_flow_data *flow)
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{
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struct atm_flow_data *walk;
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DPRINTK("find_flow(qdisc %p,flow %p)\n",qdisc,flow);
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for (walk = qdisc->flows; walk; walk = walk->next)
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if (walk == flow) return 1;
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DPRINTK("find_flow: not found\n");
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return 0;
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}
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static __inline__ struct atm_flow_data *lookup_flow(struct Qdisc *sch,
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u32 classid)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow;
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for (flow = p->flows; flow; flow = flow->next)
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if (flow->classid == classid) break;
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return flow;
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}
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static int atm_tc_graft(struct Qdisc *sch,unsigned long arg,
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struct Qdisc *new,struct Qdisc **old)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = (struct atm_flow_data *) arg;
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DPRINTK("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",sch,
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p,flow,new,old);
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if (!find_flow(p,flow)) return -EINVAL;
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if (!new) new = &noop_qdisc;
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*old = xchg(&flow->q,new);
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if (*old) qdisc_reset(*old);
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return 0;
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}
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static struct Qdisc *atm_tc_leaf(struct Qdisc *sch,unsigned long cl)
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{
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struct atm_flow_data *flow = (struct atm_flow_data *) cl;
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DPRINTK("atm_tc_leaf(sch %p,flow %p)\n",sch,flow);
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return flow ? flow->q : NULL;
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}
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static unsigned long atm_tc_get(struct Qdisc *sch,u32 classid)
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{
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struct atm_qdisc_data *p __attribute__((unused)) = PRIV(sch);
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struct atm_flow_data *flow;
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DPRINTK("atm_tc_get(sch %p,[qdisc %p],classid %x)\n",sch,p,classid);
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flow = lookup_flow(sch,classid);
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if (flow) flow->ref++;
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DPRINTK("atm_tc_get: flow %p\n",flow);
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return (unsigned long) flow;
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}
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static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
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unsigned long parent, u32 classid)
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{
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return atm_tc_get(sch,classid);
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}
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static void destroy_filters(struct atm_flow_data *flow)
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{
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struct tcf_proto *filter;
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while ((filter = flow->filter_list)) {
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DPRINTK("destroy_filters: destroying filter %p\n",filter);
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flow->filter_list = filter->next;
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tcf_destroy(filter);
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}
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}
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/*
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* atm_tc_put handles all destructions, including the ones that are explicitly
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* requested (atm_tc_destroy, etc.). The assumption here is that we never drop
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* anything that still seems to be in use.
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*/
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static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = (struct atm_flow_data *) cl;
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struct atm_flow_data **prev;
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DPRINTK("atm_tc_put(sch %p,[qdisc %p],flow %p)\n",sch,p,flow);
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if (--flow->ref) return;
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DPRINTK("atm_tc_put: destroying\n");
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for (prev = &p->flows; *prev; prev = &(*prev)->next)
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if (*prev == flow) break;
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if (!*prev) {
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printk(KERN_CRIT "atm_tc_put: class %p not found\n",flow);
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return;
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}
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*prev = flow->next;
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DPRINTK("atm_tc_put: qdisc %p\n",flow->q);
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qdisc_destroy(flow->q);
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destroy_filters(flow);
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if (flow->sock) {
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DPRINTK("atm_tc_put: f_count %d\n",
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file_count(flow->sock->file));
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flow->vcc->pop = flow->old_pop;
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sockfd_put(flow->sock);
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}
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if (flow->excess) atm_tc_put(sch,(unsigned long) flow->excess);
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if (flow != &p->link) kfree(flow);
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/*
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* If flow == &p->link, the qdisc no longer works at this point and
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* needs to be removed. (By the caller of atm_tc_put.)
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*/
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}
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static void sch_atm_pop(struct atm_vcc *vcc,struct sk_buff *skb)
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{
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struct atm_qdisc_data *p = VCC2FLOW(vcc)->parent;
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D2PRINTK("sch_atm_pop(vcc %p,skb %p,[qdisc %p])\n",vcc,skb,p);
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VCC2FLOW(vcc)->old_pop(vcc,skb);
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tasklet_schedule(&p->task);
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}
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static const u8 llc_oui_ip[] = {
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0xaa, /* DSAP: non-ISO */
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0xaa, /* SSAP: non-ISO */
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0x03, /* Ctrl: Unnumbered Information Command PDU */
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0x00, /* OUI: EtherType */
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0x00, 0x00,
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0x08, 0x00 }; /* Ethertype IP (0800) */
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static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
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struct rtattr **tca, unsigned long *arg)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = (struct atm_flow_data *) *arg;
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struct atm_flow_data *excess = NULL;
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struct rtattr *opt = tca[TCA_OPTIONS-1];
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struct rtattr *tb[TCA_ATM_MAX];
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struct socket *sock;
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int fd,error,hdr_len;
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void *hdr;
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DPRINTK("atm_tc_change(sch %p,[qdisc %p],classid %x,parent %x,"
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"flow %p,opt %p)\n",sch,p,classid,parent,flow,opt);
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/*
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* The concept of parents doesn't apply for this qdisc.
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*/
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if (parent && parent != TC_H_ROOT && parent != sch->handle)
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return -EINVAL;
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/*
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* ATM classes cannot be changed. In order to change properties of the
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* ATM connection, that socket needs to be modified directly (via the
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* native ATM API. In order to send a flow to a different VC, the old
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* class needs to be removed and a new one added. (This may be changed
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* later.)
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*/
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if (flow) return -EBUSY;
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if (opt == NULL || rtattr_parse_nested(tb, TCA_ATM_MAX, opt))
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return -EINVAL;
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if (!tb[TCA_ATM_FD-1] || RTA_PAYLOAD(tb[TCA_ATM_FD-1]) < sizeof(fd))
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return -EINVAL;
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fd = *(int *) RTA_DATA(tb[TCA_ATM_FD-1]);
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DPRINTK("atm_tc_change: fd %d\n",fd);
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if (tb[TCA_ATM_HDR-1]) {
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hdr_len = RTA_PAYLOAD(tb[TCA_ATM_HDR-1]);
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hdr = RTA_DATA(tb[TCA_ATM_HDR-1]);
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}
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else {
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hdr_len = RFC1483LLC_LEN;
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hdr = NULL; /* default LLC/SNAP for IP */
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}
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if (!tb[TCA_ATM_EXCESS-1]) excess = NULL;
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else {
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if (RTA_PAYLOAD(tb[TCA_ATM_EXCESS-1]) != sizeof(u32))
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return -EINVAL;
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excess = (struct atm_flow_data *) atm_tc_get(sch,
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*(u32 *) RTA_DATA(tb[TCA_ATM_EXCESS-1]));
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if (!excess) return -ENOENT;
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}
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DPRINTK("atm_tc_change: type %d, payload %d, hdr_len %d\n",
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opt->rta_type,RTA_PAYLOAD(opt),hdr_len);
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if (!(sock = sockfd_lookup(fd,&error))) return error; /* f_count++ */
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DPRINTK("atm_tc_change: f_count %d\n",file_count(sock->file));
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if (sock->ops->family != PF_ATMSVC && sock->ops->family != PF_ATMPVC) {
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error = -EPROTOTYPE;
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goto err_out;
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}
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/* @@@ should check if the socket is really operational or we'll crash
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on vcc->send */
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if (classid) {
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if (TC_H_MAJ(classid ^ sch->handle)) {
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DPRINTK("atm_tc_change: classid mismatch\n");
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error = -EINVAL;
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goto err_out;
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}
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if (find_flow(p,flow)) {
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error = -EEXIST;
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goto err_out;
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}
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}
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else {
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int i;
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unsigned long cl;
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for (i = 1; i < 0x8000; i++) {
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classid = TC_H_MAKE(sch->handle,0x8000 | i);
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if (!(cl = atm_tc_get(sch,classid))) break;
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atm_tc_put(sch,cl);
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}
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}
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DPRINTK("atm_tc_change: new id %x\n",classid);
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flow = kmalloc(sizeof(struct atm_flow_data)+hdr_len,GFP_KERNEL);
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DPRINTK("atm_tc_change: flow %p\n",flow);
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if (!flow) {
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error = -ENOBUFS;
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goto err_out;
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}
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memset(flow,0,sizeof(*flow));
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flow->filter_list = NULL;
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if (!(flow->q = qdisc_create_dflt(sch->dev,&pfifo_qdisc_ops)))
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flow->q = &noop_qdisc;
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DPRINTK("atm_tc_change: qdisc %p\n",flow->q);
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flow->sock = sock;
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flow->vcc = ATM_SD(sock); /* speedup */
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flow->vcc->user_back = flow;
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DPRINTK("atm_tc_change: vcc %p\n",flow->vcc);
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flow->old_pop = flow->vcc->pop;
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flow->parent = p;
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flow->vcc->pop = sch_atm_pop;
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flow->classid = classid;
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flow->ref = 1;
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flow->excess = excess;
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flow->next = p->link.next;
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p->link.next = flow;
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flow->hdr_len = hdr_len;
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if (hdr)
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memcpy(flow->hdr,hdr,hdr_len);
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else
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memcpy(flow->hdr,llc_oui_ip,sizeof(llc_oui_ip));
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*arg = (unsigned long) flow;
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return 0;
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err_out:
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if (excess) atm_tc_put(sch,(unsigned long) excess);
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sockfd_put(sock);
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return error;
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}
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static int atm_tc_delete(struct Qdisc *sch,unsigned long arg)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = (struct atm_flow_data *) arg;
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DPRINTK("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n",sch,p,flow);
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if (!find_flow(PRIV(sch),flow)) return -EINVAL;
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if (flow->filter_list || flow == &p->link) return -EBUSY;
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/*
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* Reference count must be 2: one for "keepalive" (set at class
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* creation), and one for the reference held when calling delete.
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*/
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if (flow->ref < 2) {
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printk(KERN_ERR "atm_tc_delete: flow->ref == %d\n",flow->ref);
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return -EINVAL;
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}
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if (flow->ref > 2) return -EBUSY; /* catch references via excess, etc.*/
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atm_tc_put(sch,arg);
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return 0;
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}
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static void atm_tc_walk(struct Qdisc *sch,struct qdisc_walker *walker)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow;
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DPRINTK("atm_tc_walk(sch %p,[qdisc %p],walker %p)\n",sch,p,walker);
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if (walker->stop) return;
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for (flow = p->flows; flow; flow = flow->next) {
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if (walker->count >= walker->skip)
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if (walker->fn(sch,(unsigned long) flow,walker) < 0) {
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walker->stop = 1;
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break;
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}
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walker->count++;
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}
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}
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static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch,unsigned long cl)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = (struct atm_flow_data *) cl;
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DPRINTK("atm_tc_find_tcf(sch %p,[qdisc %p],flow %p)\n",sch,p,flow);
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return flow ? &flow->filter_list : &p->link.filter_list;
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}
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/* --------------------------- Qdisc operations ---------------------------- */
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static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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struct atm_flow_data *flow = NULL ; /* @@@ */
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struct tcf_result res;
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int result;
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int ret = NET_XMIT_POLICED;
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D2PRINTK("atm_tc_enqueue(skb %p,sch %p,[qdisc %p])\n",skb,sch,p);
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result = TC_POLICE_OK; /* be nice to gcc */
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if (TC_H_MAJ(skb->priority) != sch->handle ||
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!(flow = (struct atm_flow_data *) atm_tc_get(sch,skb->priority)))
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for (flow = p->flows; flow; flow = flow->next)
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if (flow->filter_list) {
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result = tc_classify(skb,flow->filter_list,
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&res);
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if (result < 0) continue;
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flow = (struct atm_flow_data *) res.class;
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if (!flow) flow = lookup_flow(sch,res.classid);
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break;
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}
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if (!flow) flow = &p->link;
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else {
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if (flow->vcc)
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ATM_SKB(skb)->atm_options = flow->vcc->atm_options;
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/*@@@ looks good ... but it's not supposed to work :-)*/
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#ifdef CONFIG_NET_CLS_POLICE
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switch (result) {
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case TC_POLICE_SHOT:
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kfree_skb(skb);
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break;
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case TC_POLICE_RECLASSIFY:
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if (flow->excess) flow = flow->excess;
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else {
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ATM_SKB(skb)->atm_options |=
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ATM_ATMOPT_CLP;
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break;
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}
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/* fall through */
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case TC_POLICE_OK:
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/* fall through */
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default:
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break;
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}
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#endif
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}
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if (
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#ifdef CONFIG_NET_CLS_POLICE
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result == TC_POLICE_SHOT ||
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#endif
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(ret = flow->q->enqueue(skb,flow->q)) != 0) {
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sch->qstats.drops++;
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if (flow) flow->qstats.drops++;
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return ret;
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}
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sch->bstats.bytes += skb->len;
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sch->bstats.packets++;
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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");
|