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Diffstat (limited to 'net/sched/sch_dsmark.c')
-rw-r--r--net/sched/sch_dsmark.c276
1 files changed, 142 insertions, 134 deletions
diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c
index 60f89199e3d..0df911fd67b 100644
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -10,28 +10,12 @@
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
+#include <linux/bitops.h>
#include <net/pkt_sched.h>
#include <net/dsfield.h>
#include <net/inet_ecn.h>
#include <asm/byteorder.h>
-
-#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) ((struct dsmark_qdisc_data *) qdisc_priv(sch))
-
-
/*
* classid class marking
* ------- ----- -------
@@ -60,17 +44,6 @@ struct dsmark_qdisc_data {
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);
@@ -81,9 +54,9 @@ static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index)
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",
+ pr_debug("dsmark_graft(sch %p,[qdisc %p],new %p,old %p)\n",
sch, p, new, old);
if (new == NULL) {
@@ -104,13 +77,14 @@ static int dsmark_graft(struct Qdisc *sch, unsigned long arg,
static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg)
{
- return PRIV(sch)->q;
+ struct dsmark_qdisc_data *p = qdisc_priv(sch);
+ return p->q;
}
static unsigned long dsmark_get(struct Qdisc *sch, u32 classid)
{
- DPRINTK("dsmark_get(sch %p,[qdisc %p],classid %x)\n",
- sch, PRIV(sch), classid);
+ pr_debug("dsmark_get(sch %p,[qdisc %p],classid %x)\n",
+ sch, qdisc_priv(sch), classid);
return TC_H_MIN(classid) + 1;
}
@@ -125,44 +99,56 @@ 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;
- if (tb[TCA_DSMARK_MASK-1])
- mask = RTA_GET_U8(tb[TCA_DSMARK_MASK-1]);
+ err = nla_parse_nested(tb, TCA_DSMARK_MAX, opt, dsmark_policy);
+ if (err < 0)
+ goto errout;
+
+ 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_VALUE])
+ p->value[*arg-1] = nla_get_u8(tb[TCA_DSMARK_VALUE]);
- if (tb[TCA_DSMARK_MASK-1])
+ 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)
{
- struct dsmark_qdisc_data *p = PRIV(sch);
+ struct dsmark_qdisc_data *p = qdisc_priv(sch);
if (!dsmark_valid_index(p, arg))
return -EINVAL;
@@ -173,12 +159,12 @@ static int dsmark_delete(struct Qdisc *sch, unsigned long arg)
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;
@@ -197,34 +183,42 @@ ignore:
}
}
-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)
{
- return &PRIV(sch)->filter_list;
+ 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 dsmark_qdisc_data *p = qdisc_priv(sch);
int err;
- D2PRINTK("dsmark_enqueue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
+ pr_debug("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(ip_hdr(skb))
- & ~INET_ECN_MASK;
- break;
- case __constant_htons(ETH_P_IPV6):
- skb->tc_index = ipv6_get_dsfield(ipv6_hdr(skb))
- & ~INET_ECN_MASK;
- break;
- default:
- skb->tc_index = 0;
- break;
+ case __constant_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 __constant_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;
}
}
@@ -234,7 +228,7 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
struct tcf_result res;
int result = tc_classify(skb, p->filter_list, &res);
- D2PRINTK("result %d class 0x%04x\n", result, res.classid);
+ pr_debug("result %d class 0x%04x\n", result, res.classid);
switch (result) {
#ifdef CONFIG_NET_CLS_ACT
@@ -242,14 +236,14 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
case TC_ACT_STOLEN:
kfree_skb(skb);
return NET_XMIT_SUCCESS;
+
case TC_ACT_SHOT:
- kfree_skb(skb);
- sch->qstats.drops++;
- return NET_XMIT_BYPASS;
+ goto drop;
#endif
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;
@@ -257,7 +251,7 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
}
}
- err = p->q->enqueue(skb,p->q);
+ err = p->q->enqueue(skb, p->q);
if (err != NET_XMIT_SUCCESS) {
sch->qstats.drops++;
return err;
@@ -268,15 +262,20 @@ static int dsmark_enqueue(struct sk_buff *skb,struct Qdisc *sch)
sch->q.qlen++;
return NET_XMIT_SUCCESS;
+
+drop:
+ kfree_skb(skb);
+ sch->qstats.drops++;
+ return 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;
u32 index;
- D2PRINTK("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p);
+ pr_debug("dsmark_dequeue(sch %p,[qdisc %p])\n", sch, p);
skb = p->q->ops->dequeue(p->q);
if (skb == NULL)
@@ -285,39 +284,39 @@ static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
sch->q.qlen--;
index = skb->tc_index & (p->indices - 1);
- D2PRINTK("index %d->%d\n", skb->tc_index, index);
+ pr_debug("index %d->%d\n", skb->tc_index, index);
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
- ipv4_change_dsfield(ip_hdr(skb), p->mask[index],
- p->value[index]);
- break;
- case __constant_htons(ETH_P_IPV6):
- ipv6_change_dsfield(ipv6_hdr(skb), p->mask[index],
- p->value[index]);
+ case __constant_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",
- ntohs(skb->protocol));
+ case __constant_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 int dsmark_requeue(struct sk_buff *skb, struct Qdisc *sch)
{
- struct dsmark_qdisc_data *p = PRIV(sch);
+ struct dsmark_qdisc_data *p = qdisc_priv(sch);
int err;
- D2PRINTK("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
+ pr_debug("dsmark_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
err = p->q->ops->requeue(skb, p->q);
if (err != NET_XMIT_SUCCESS) {
@@ -333,10 +332,10 @@ static int dsmark_requeue(struct sk_buff *skb,struct Qdisc *sch)
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);
+ pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p);
if (p->q->ops->drop == NULL)
return 0;
@@ -348,26 +347,32 @@ static unsigned int dsmark_drop(struct Qdisc *sch)
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;
+
+ err = -EINVAL;
+ indices = nla_get_u16(tb[TCA_DSMARK_INDICES]);
+
+ if (hweight32(indices) != 1)
goto errout;
- if (tb[TCA_DSMARK_DEFAULT_INDEX-1])
- default_index = RTA_GET_U16(tb[TCA_DSMARK_DEFAULT_INDEX-1]);
+ 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) {
@@ -383,34 +388,33 @@ 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, 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 dsmark_qdisc_data *p = qdisc_priv(sch);
- DPRINTK("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p);
+ pr_debug("dsmark_destroy(sch %p,[qdisc %p])\n", sch, p);
tcf_destroy_chain(p->filter_list);
qdisc_destroy(p->q);
@@ -420,10 +424,10 @@ static void dsmark_destroy(struct Qdisc *sch)
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;
@@ -431,37 +435,41 @@ static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl,
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:
+ return nla_nest_cancel(skb, opts);
}
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:
+ return nla_nest_cancel(skb, opts);
}
-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,
@@ -475,7 +483,7 @@ 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",
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 23:27:23 +0000