X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=net%2Fsched%2Fsch_dsmark.c;h=d303daa45d49e54f34bc11d698d309253c5e77b2;hb=e46b498c84163e86e2627c30bca298c968664f65;hp=ac0efeae312e4532a33e565c5411757365d19c46;hpb=02f23f095f1d9534873ecb5d94bbdb0ab67f1d8e;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c index ac0efea..d303daa 100644 --- a/net/sched/sch_dsmark.c +++ b/net/sched/sch_dsmark.c @@ -3,37 +3,19 @@ /* Written 1998-2000 by Werner Almesberger, EPFL ICA */ -#include #include #include #include #include #include #include -#include /* for pkt_sched */ #include +#include #include #include #include #include - -#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 - - -#define PRIV(sch) qdisc_priv(sch) - - /* * classid class marking * ------- ----- ------- @@ -55,24 +37,13 @@ struct dsmark_qdisc_data { struct Qdisc *q; struct tcf_proto *filter_list; - __u8 *mask; /* "owns" the array */ - __u8 *value; - __u16 indices; - __u32 default_index; /* index range is 0...0xffff */ + u8 *mask; /* "owns" the array */ + u8 *value; + u16 indices; + u32 default_index; /* index range is 0...0xffff */ int set_tc_index; }; -static inline int dsmark_valid_indices(u16 indices) -{ - while (indices != 1) { - if (indices & 1) - return 0; - indices >>= 1; - } - - return 1; -} - static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) { return (index <= p->indices && index > 0); @@ -80,115 +51,126 @@ static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) /* ------------------------- Class/flow operations ------------------------- */ - -static int dsmark_graft(struct Qdisc *sch,unsigned long arg, - struct Qdisc *new,struct Qdisc **old) +static int dsmark_graft(struct Qdisc *sch, unsigned long arg, + struct Qdisc *new, struct Qdisc **old) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); - DPRINTK("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n",sch,p,new, - old); + pr_debug("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n", + sch, p, new, old); if (new == NULL) { - new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops); + new = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, + &pfifo_qdisc_ops, + sch->handle); if (new == NULL) new = &noop_qdisc; } sch_tree_lock(sch); - *old = xchg(&p->q,new); - if (*old) - qdisc_reset(*old); - sch->q.qlen = 0; - sch_tree_unlock(sch); /* @@@ move up ? */ - return 0; -} + *old = p->q; + p->q = new; + qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); + qdisc_reset(*old); + sch_tree_unlock(sch); + return 0; +} static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg) { - struct dsmark_qdisc_data *p = PRIV(sch); - + struct dsmark_qdisc_data *p = qdisc_priv(sch); return p->q; } - -static unsigned long dsmark_get(struct Qdisc *sch,u32 classid) +static unsigned long dsmark_get(struct Qdisc *sch, u32 classid) { - struct dsmark_qdisc_data *p __attribute__((unused)) = PRIV(sch); + pr_debug("dsmark_get(sch %p,[qdisc %p],classid %x)\n", + sch, qdisc_priv(sch), classid); - DPRINTK("dsmark_get(sch %p,[qdisc %p],classid %x)\n",sch,p,classid); - return TC_H_MIN(classid)+1; + return TC_H_MIN(classid) + 1; } - static unsigned long dsmark_bind_filter(struct Qdisc *sch, - unsigned long parent, u32 classid) + unsigned long parent, u32 classid) { - return dsmark_get(sch,classid); + return dsmark_get(sch, classid); } - static void dsmark_put(struct Qdisc *sch, unsigned long cl) { } +static const struct nla_policy dsmark_policy[TCA_DSMARK_MAX + 1] = { + [TCA_DSMARK_INDICES] = { .type = NLA_U16 }, + [TCA_DSMARK_DEFAULT_INDEX] = { .type = NLA_U16 }, + [TCA_DSMARK_SET_TC_INDEX] = { .type = NLA_FLAG }, + [TCA_DSMARK_MASK] = { .type = NLA_U8 }, + [TCA_DSMARK_VALUE] = { .type = NLA_U8 }, +}; static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent, - struct rtattr **tca, unsigned long *arg) + struct nlattr **tca, unsigned long *arg) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct rtattr *opt = tca[TCA_OPTIONS-1]; - struct rtattr *tb[TCA_DSMARK_MAX]; + struct dsmark_qdisc_data *p = qdisc_priv(sch); + struct nlattr *opt = tca[TCA_OPTIONS]; + struct nlattr *tb[TCA_DSMARK_MAX + 1]; int err = -EINVAL; u8 mask = 0; - DPRINTK("dsmark_change(sch %p,[qdisc %p],classid %x,parent %x)," + pr_debug("dsmark_change(sch %p,[qdisc %p],classid %x,parent %x)," "arg 0x%lx\n", sch, p, classid, parent, *arg); if (!dsmark_valid_index(p, *arg)) { err = -ENOENT; - goto rtattr_failure; + goto errout; } - if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt)) - goto rtattr_failure; + if (!opt) + goto errout; + + err = nla_parse_nested(tb, TCA_DSMARK_MAX, opt, dsmark_policy); + if (err < 0) + goto errout; - if (tb[TCA_DSMARK_MASK-1]) - mask = RTA_GET_U8(tb[TCA_DSMARK_MASK-1]); + if (tb[TCA_DSMARK_MASK]) + mask = nla_get_u8(tb[TCA_DSMARK_MASK]); - if (tb[TCA_DSMARK_VALUE-1]) - p->value[*arg-1] = RTA_GET_U8(tb[TCA_DSMARK_VALUE-1]); - - if (tb[TCA_DSMARK_MASK-1]) + if (tb[TCA_DSMARK_VALUE]) + p->value[*arg-1] = nla_get_u8(tb[TCA_DSMARK_VALUE]); + + if (tb[TCA_DSMARK_MASK]) p->mask[*arg-1] = mask; err = 0; -rtattr_failure: +errout: return err; } -static int dsmark_delete(struct Qdisc *sch,unsigned long arg) +static int dsmark_delete(struct Qdisc *sch, unsigned long arg) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); - if (!arg || arg > p->indices) + if (!dsmark_valid_index(p, arg)) return -EINVAL; + p->mask[arg-1] = 0xff; p->value[arg-1] = 0; + return 0; } - -static void dsmark_walk(struct Qdisc *sch,struct qdisc_walker *walker) +static void dsmark_walk(struct Qdisc *sch, struct qdisc_walker *walker) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); int i; - DPRINTK("dsmark_walk(sch %p,[qdisc %p],walker %p)\n",sch,p,walker); + pr_debug("dsmark_walk(sch %p,[qdisc %p],walker %p)\n", sch, p, walker); + if (walker->stop) return; + for (i = 0; i < p->indices; i++) { if (p->mask[i] == 0xff && !p->value[i]) goto ignore; @@ -198,179 +180,192 @@ static void dsmark_walk(struct Qdisc *sch,struct qdisc_walker *walker) break; } } -ignore: +ignore: walker->count++; - } + } } - -static struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch,unsigned long cl) +static inline struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch, + unsigned long cl) { - struct dsmark_qdisc_data *p = PRIV(sch); - + struct dsmark_qdisc_data *p = qdisc_priv(sch); return &p->filter_list; } - /* --------------------------- Qdisc operations ---------------------------- */ - -static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch) +static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct tcf_result res; - int result; - int ret = NET_XMIT_POLICED; + struct dsmark_qdisc_data *p = qdisc_priv(sch); + int err; + + pr_debug("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p); - D2PRINTK("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n",skb,sch,p); if (p->set_tc_index) { - /* FIXME: Safe with non-linear skbs? --RR */ switch (skb->protocol) { - case __constant_htons(ETH_P_IP): - skb->tc_index = ipv4_get_dsfield(skb->nh.iph) - & ~INET_ECN_MASK; - break; - case __constant_htons(ETH_P_IPV6): - skb->tc_index = ipv6_get_dsfield(skb->nh.ipv6h) - & ~INET_ECN_MASK; - break; - default: - skb->tc_index = 0; - break; - }; + case htons(ETH_P_IP): + if (skb_cow_head(skb, sizeof(struct iphdr))) + goto drop; + + skb->tc_index = ipv4_get_dsfield(ip_hdr(skb)) + & ~INET_ECN_MASK; + break; + + case htons(ETH_P_IPV6): + if (skb_cow_head(skb, sizeof(struct ipv6hdr))) + goto drop; + + skb->tc_index = ipv6_get_dsfield(ipv6_hdr(skb)) + & ~INET_ECN_MASK; + break; + default: + skb->tc_index = 0; + break; + } } - result = TC_POLICE_OK; /* be nice to gcc */ - if (TC_H_MAJ(skb->priority) == sch->handle) { + + if (TC_H_MAJ(skb->priority) == sch->handle) skb->tc_index = TC_H_MIN(skb->priority); - } else { - result = tc_classify(skb,p->filter_list,&res); - D2PRINTK("result %d class 0x%04x\n",result,res.classid); + else { + struct tcf_result res; + int result = tc_classify(skb, p->filter_list, &res); + + pr_debug("result %d class 0x%04x\n", result, res.classid); + switch (result) { -#ifdef CONFIG_NET_CLS_POLICE - case TC_POLICE_SHOT: - kfree_skb(skb); - break; -#if 0 - case TC_POLICE_RECLASSIFY: - /* FIXME: what to do here ??? */ -#endif +#ifdef CONFIG_NET_CLS_ACT + case TC_ACT_QUEUED: + case TC_ACT_STOLEN: + kfree_skb(skb); + return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; + + case TC_ACT_SHOT: + goto drop; #endif - case TC_POLICE_OK: - skb->tc_index = TC_H_MIN(res.classid); - break; - case TC_POLICE_UNSPEC: - /* fall through */ - default: - if (p->default_index != NO_DEFAULT_INDEX) - skb->tc_index = p->default_index; - break; - }; + case TC_ACT_OK: + skb->tc_index = TC_H_MIN(res.classid); + break; + + default: + if (p->default_index != NO_DEFAULT_INDEX) + skb->tc_index = p->default_index; + break; + } } - if ( -#ifdef CONFIG_NET_CLS_POLICE - result == TC_POLICE_SHOT || -#endif - ((ret = p->q->enqueue(skb,p->q)) != 0)) { - sch->qstats.drops++; - return ret; + err = qdisc_enqueue(skb, p->q); + if (err != NET_XMIT_SUCCESS) { + if (net_xmit_drop_count(err)) + sch->qstats.drops++; + return err; } - sch->bstats.bytes += skb->len; + + sch->bstats.bytes += qdisc_pkt_len(skb); sch->bstats.packets++; sch->q.qlen++; - return ret; -} + return NET_XMIT_SUCCESS; + +drop: + kfree_skb(skb); + sch->qstats.drops++; + return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; +} static struct sk_buff *dsmark_dequeue(struct Qdisc *sch) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); struct sk_buff *skb; - int index; + u32 index; + + pr_debug("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p); - D2PRINTK("dsmark_dequeue(sch %p,[qdisc %p])\n",sch,p); skb = p->q->ops->dequeue(p->q); - if (!skb) + if (skb == NULL) return NULL; + sch->q.qlen--; - index = skb->tc_index & (p->indices-1); - D2PRINTK("index %d->%d\n",skb->tc_index,index); + + index = skb->tc_index & (p->indices - 1); + pr_debug("index %d->%d\n", skb->tc_index, index); + switch (skb->protocol) { - case __constant_htons(ETH_P_IP): - ipv4_change_dsfield(skb->nh.iph, - p->mask[index],p->value[index]); - break; - case __constant_htons(ETH_P_IPV6): - ipv6_change_dsfield(skb->nh.ipv6h, - p->mask[index],p->value[index]); + case htons(ETH_P_IP): + ipv4_change_dsfield(ip_hdr(skb), p->mask[index], + p->value[index]); break; - default: - /* - * Only complain if a change was actually attempted. - * This way, we can send non-IP traffic through dsmark - * and don't need yet another qdisc as a bypass. - */ - if (p->mask[index] != 0xff || p->value[index]) - printk(KERN_WARNING "dsmark_dequeue: " - "unsupported protocol %d\n", - htons(skb->protocol)); + case htons(ETH_P_IPV6): + ipv6_change_dsfield(ipv6_hdr(skb), p->mask[index], + p->value[index]); break; - }; + default: + /* + * Only complain if a change was actually attempted. + * This way, we can send non-IP traffic through dsmark + * and don't need yet another qdisc as a bypass. + */ + if (p->mask[index] != 0xff || p->value[index]) + printk(KERN_WARNING + "dsmark_dequeue: unsupported protocol %d\n", + ntohs(skb->protocol)); + break; + } + return skb; } - -static int dsmark_requeue(struct sk_buff *skb,struct Qdisc *sch) +static struct sk_buff *dsmark_peek(struct Qdisc *sch) { - int ret; - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); - D2PRINTK("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n",skb,sch,p); - if ((ret = p->q->ops->requeue(skb, p->q)) == 0) { - sch->q.qlen++; - sch->qstats.requeues++; - return 0; - } - sch->qstats.drops++; - return ret; -} + pr_debug("dsmark_peek(sch %p,[qdisc %p])\n", sch, p); + return p->q->ops->peek(p->q); +} static unsigned int dsmark_drop(struct Qdisc *sch) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); unsigned int len; - - DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n",sch,p); - if (!p->q->ops->drop) - return 0; - if (!(len = p->q->ops->drop(p->q))) + + pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); + + if (p->q->ops->drop == NULL) return 0; - sch->q.qlen--; + + len = p->q->ops->drop(p->q); + if (len) + sch->q.qlen--; + return len; } - -static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) +static int dsmark_init(struct Qdisc *sch, struct nlattr *opt) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct rtattr *tb[TCA_DSMARK_MAX]; + struct dsmark_qdisc_data *p = qdisc_priv(sch); + struct nlattr *tb[TCA_DSMARK_MAX + 1]; int err = -EINVAL; u32 default_index = NO_DEFAULT_INDEX; u16 indices; u8 *mask; - DPRINTK("dsmark_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); + pr_debug("dsmark_init(sch %p,[qdisc %p],opt %p)\n", sch, p, opt); - if (!opt || rtattr_parse_nested(tb, TCA_DSMARK_MAX, opt) < 0) + if (!opt) goto errout; - indices = RTA_GET_U16(tb[TCA_DSMARK_INDICES-1]); - if (!indices || !dsmark_valid_indices(indices)) + err = nla_parse_nested(tb, TCA_DSMARK_MAX, opt, dsmark_policy); + if (err < 0) goto errout; - if (tb[TCA_DSMARK_DEFAULT_INDEX-1]) - default_index = RTA_GET_U16(tb[TCA_DSMARK_DEFAULT_INDEX-1]); + err = -EINVAL; + indices = nla_get_u16(tb[TCA_DSMARK_INDICES]); + + if (hweight32(indices) != 1) + goto errout; + + if (tb[TCA_DSMARK_DEFAULT_INDEX]) + default_index = nla_get_u16(tb[TCA_DSMARK_DEFAULT_INDEX]); mask = kmalloc(indices * 2, GFP_KERNEL); if (mask == NULL) { @@ -386,91 +381,91 @@ static int dsmark_init(struct Qdisc *sch, struct rtattr *opt) p->indices = indices; p->default_index = default_index; - p->set_tc_index = RTA_GET_FLAG(tb[TCA_DSMARK_SET_TC_INDEX-1]); + p->set_tc_index = nla_get_flag(tb[TCA_DSMARK_SET_TC_INDEX]); - p->q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops); + p->q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, + &pfifo_qdisc_ops, sch->handle); if (p->q == NULL) p->q = &noop_qdisc; - DPRINTK("dsmark_init: qdisc %p\n", p->q); + pr_debug("dsmark_init: qdisc %p\n", p->q); err = 0; errout: -rtattr_failure: return err; } - static void dsmark_reset(struct Qdisc *sch) { - struct dsmark_qdisc_data *p = PRIV(sch); + struct dsmark_qdisc_data *p = qdisc_priv(sch); - DPRINTK("dsmark_reset(sch %p,[qdisc %p])\n",sch,p); + pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p); qdisc_reset(p->q); sch->q.qlen = 0; } - static void dsmark_destroy(struct Qdisc *sch) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct tcf_proto *tp; - - DPRINTK("dsmark_destroy(sch %p,[qdisc %p])\n",sch,p); - while (p->filter_list) { - tp = p->filter_list; - p->filter_list = tp->next; - tcf_destroy(tp); - } + struct dsmark_qdisc_data *p = qdisc_priv(sch); + + pr_debug("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p); + + tcf_destroy_chain(&p->filter_list); qdisc_destroy(p->q); kfree(p->mask); } - static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb, struct tcmsg *tcm) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct rtattr *opts = NULL; + struct dsmark_qdisc_data *p = qdisc_priv(sch); + struct nlattr *opts = NULL; - DPRINTK("dsmark_dump_class(sch %p,[qdisc %p],class %ld\n", sch, p, cl); + pr_debug("dsmark_dump_class(sch %p,[qdisc %p],class %ld\n", sch, p, cl); if (!dsmark_valid_index(p, cl)) return -EINVAL; tcm->tcm_handle = TC_H_MAKE(TC_H_MAJ(sch->handle), cl-1); + tcm->tcm_info = p->q->handle; - opts = RTA_NEST(skb, TCA_OPTIONS); - RTA_PUT_U8(skb,TCA_DSMARK_MASK, p->mask[cl-1]); - RTA_PUT_U8(skb,TCA_DSMARK_VALUE, p->value[cl-1]); + opts = nla_nest_start(skb, TCA_OPTIONS); + if (opts == NULL) + goto nla_put_failure; + NLA_PUT_U8(skb, TCA_DSMARK_MASK, p->mask[cl-1]); + NLA_PUT_U8(skb, TCA_DSMARK_VALUE, p->value[cl-1]); - return RTA_NEST_END(skb, opts); + return nla_nest_end(skb, opts); -rtattr_failure: - return RTA_NEST_CANCEL(skb, opts); +nla_put_failure: + nla_nest_cancel(skb, opts); + return -EMSGSIZE; } static int dsmark_dump(struct Qdisc *sch, struct sk_buff *skb) { - struct dsmark_qdisc_data *p = PRIV(sch); - struct rtattr *opts = NULL; + struct dsmark_qdisc_data *p = qdisc_priv(sch); + struct nlattr *opts = NULL; - opts = RTA_NEST(skb, TCA_OPTIONS); - RTA_PUT_U16(skb, TCA_DSMARK_INDICES, p->indices); + opts = nla_nest_start(skb, TCA_OPTIONS); + if (opts == NULL) + goto nla_put_failure; + NLA_PUT_U16(skb, TCA_DSMARK_INDICES, p->indices); if (p->default_index != NO_DEFAULT_INDEX) - RTA_PUT_U16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index); + NLA_PUT_U16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index); if (p->set_tc_index) - RTA_PUT_FLAG(skb, TCA_DSMARK_SET_TC_INDEX); + NLA_PUT_FLAG(skb, TCA_DSMARK_SET_TC_INDEX); - return RTA_NEST_END(skb, opts); + return nla_nest_end(skb, opts); -rtattr_failure: - return RTA_NEST_CANCEL(skb, opts); +nla_put_failure: + nla_nest_cancel(skb, opts); + return -EMSGSIZE; } -static struct Qdisc_class_ops dsmark_class_ops = { +static const struct Qdisc_class_ops dsmark_class_ops = { .graft = dsmark_graft, .leaf = dsmark_leaf, .get = dsmark_get, @@ -484,14 +479,14 @@ static struct Qdisc_class_ops dsmark_class_ops = { .dump = dsmark_dump_class, }; -static struct Qdisc_ops dsmark_qdisc_ops = { +static struct Qdisc_ops dsmark_qdisc_ops __read_mostly = { .next = NULL, .cl_ops = &dsmark_class_ops, .id = "dsmark", .priv_size = sizeof(struct dsmark_qdisc_data), .enqueue = dsmark_enqueue, .dequeue = dsmark_dequeue, - .requeue = dsmark_requeue, + .peek = dsmark_peek, .drop = dsmark_drop, .init = dsmark_init, .reset = dsmark_reset, @@ -505,10 +500,13 @@ static int __init dsmark_module_init(void) { return register_qdisc(&dsmark_qdisc_ops); } -static void __exit dsmark_module_exit(void) + +static void __exit dsmark_module_exit(void) { unregister_qdisc(&dsmark_qdisc_ops); } + module_init(dsmark_module_init) module_exit(dsmark_module_exit) + MODULE_LICENSE("GPL");