[NET_SCHED]: sch_atm: Lindent
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
David S. Miller
parent
f13ec93fba
commit
b0188d4dbe
1 changed files with 231 additions and 235 deletions
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@ -2,7 +2,6 @@
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/* Written 1998-2000 by Werner Almesberger, EPFL ICA */
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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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@ -15,7 +14,6 @@
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#include <net/netlink.h>
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#include <net/pkt_sched.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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@ -30,7 +28,6 @@ extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
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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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@ -52,16 +49,15 @@ extern struct socket *sockfd_lookup(int fd, int *err); /* @@@ fix this */
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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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void (*old_pop)(struct atm_vcc *vcc,
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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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@ -82,50 +78,49 @@ struct atm_qdisc_data {
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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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if (walk == flow)
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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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static inline struct atm_flow_data *lookup_flow(struct Qdisc *sch, 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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if (flow->classid == classid)
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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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DPRINTK("atm_tc_graft(sch %p,[qdisc %p],flow %p,new %p,old %p)\n",
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sch, p, flow, new, old);
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if (!find_flow(p, flow))
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return -EINVAL;
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if (!new)
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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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if (*old)
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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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@ -134,20 +129,19 @@ static struct Qdisc *atm_tc_leaf(struct Qdisc *sch,unsigned long cl)
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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_qdisc_data *p __maybe_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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if (flow)
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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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@ -159,7 +153,6 @@ static unsigned long atm_tc_bind_filter(struct Qdisc *sch,
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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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@ -167,10 +160,12 @@ static void atm_tc_put(struct Qdisc *sch, unsigned long 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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if (--flow->ref)
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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 == flow)
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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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@ -185,15 +180,16 @@ static void atm_tc_put(struct Qdisc *sch, unsigned long cl)
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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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if (flow->excess)
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atm_tc_put(sch, (unsigned long)flow->excess);
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if (flow != &p->link)
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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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@ -209,7 +205,8 @@ static const u8 llc_oui_ip[] = {
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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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0x08, 0x00
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}; /* 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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@ -237,7 +234,8 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
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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 (flow)
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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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@ -247,22 +245,24 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
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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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} 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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if (!tb[TCA_ATM_EXCESS - 1])
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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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excess = (struct atm_flow_data *)
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atm_tc_get(sch, *(u32 *)RTA_DATA(tb[TCA_ATM_EXCESS - 1]));
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if (!excess)
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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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if (!(sock = sockfd_lookup(fd, &error)))
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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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@ -280,14 +280,14 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
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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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} 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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if (!(cl = atm_tc_get(sch, classid)))
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break;
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atm_tc_put(sch, cl);
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}
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}
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@ -323,20 +323,22 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
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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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if (excess)
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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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if (!find_flow(PRIV(sch), flow))
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return -EINVAL;
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if (flow->filter_list || flow == &p->link)
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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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@ -345,19 +347,20 @@ static int atm_tc_delete(struct Qdisc *sch,unsigned long arg)
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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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if (flow->ref > 2)
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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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if (walker->stop)
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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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@ -368,7 +371,6 @@ static void atm_tc_walk(struct Qdisc *sch,struct qdisc_walker *walker)
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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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@ -378,10 +380,8 @@ static struct tcf_proto **atm_tc_find_tcf(struct Qdisc *sch,unsigned long cl)
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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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@ -398,12 +398,15 @@ static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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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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if (result < 0)
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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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if (!flow)
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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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if (!flow)
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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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@ -414,10 +417,10 @@ static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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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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if (flow->excess)
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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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ATM_SKB(skb)->atm_options |= ATM_ATMOPT_CLP;
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break;
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}
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/* fall through */
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@ -434,7 +437,8 @@ static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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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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if (flow)
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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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@ -458,7 +462,6 @@ static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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return NET_XMIT_BYPASS;
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}
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/*
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* Dequeue packets and send them over ATM. Note that we quite deliberately
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* avoid checking net_device's flow control here, simply because sch_atm
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@ -466,7 +469,6 @@ static int atm_tc_enqueue(struct sk_buff *skb,struct Qdisc *sch)
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* non-ATM interfaces.
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*/
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static void sch_atm_dequeue(unsigned long data)
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{
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struct Qdisc *sch = (struct Qdisc *)data;
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@ -493,7 +495,8 @@ static void sch_atm_dequeue(unsigned long data)
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new = skb_realloc_headroom(skb, flow->hdr_len);
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dev_kfree_skb(skb);
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if (!new) continue;
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if (!new)
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continue;
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skb = new;
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}
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D2PRINTK("sch_atm_dequeue: ip %p, data %p\n",
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@ -504,11 +507,10 @@ static void sch_atm_dequeue(unsigned long data)
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atomic_add(skb->truesize,
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&sk_atm(flow->vcc)->sk_wmem_alloc);
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/* atm.atm_options are already set by atm_tc_enqueue */
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(void) flow->vcc->send(flow->vcc,skb);
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flow->vcc->send(flow->vcc, skb);
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}
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}
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static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
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{
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struct atm_qdisc_data *p = PRIV(sch);
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@ -517,11 +519,11 @@ static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
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D2PRINTK("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
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tasklet_schedule(&p->task);
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skb = p->link.q->dequeue(p->link.q);
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if (skb) sch->q.qlen--;
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if (skb)
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sch->q.qlen--;
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return skb;
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}
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static int atm_tc_requeue(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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@ -539,7 +541,6 @@ static int atm_tc_requeue(struct sk_buff *skb,struct Qdisc *sch)
|
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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);
|
||||
|
|
|
|||
Loading…
Reference in a new issue