Adds net/sch_generic.h containing all bits directly referenced by
schedulers and classifiers. Map of users:
Group 1)
struct qdisc_rate_table sch_*, tcf_police -> cls_*
Could theoretically be moved to pkt_sched.h with Patch 4
but the long term goal it so make net/act_api.h to being
dependent on net/pkt_sched.h
Group 2)
struct Qdisc sch_*, tcf_proto -> cls_*
struct Qdisc_ops sch_*, tcf_proto -> cls_*
struct Qdisc_class_ops sch_*, tcf_proto -> cls_*
struct tcf_proto_ops sch_*, cls_*
struct tcf_proto sch_*, cls_*
Obviously used by schedulers but also by classifiers to
bind classes (tcf_proto -> Qdisc -> Qdisc_ops ->
Qdisc_class_ops). tcf_proto OTOH is used by schedulers,
(neat cross usage).
Group 3)
struct tcf_result sch_*, cls_*
Used to communicate between scheduler and classifer
to report classify result.
Group 4)
sch_tree_(un)lock sch_*, cls_*
tcf_tree_(un)lock sch_*, cls_*
qdisc(un)lock_tree sch_*, cls_*
Randomly used in schedulers and classifiers.
Group 5)
tcf_destroy sch_*, cls_api.c
Coud theoretically be moved to pkt_sched.h if we include
pkt_sched.h in cls_api.c but this is really generic and
it seemd cleaner to have it here. This would be the only
classifier related action in pkt_sched.h
The following types are referenced in sch_generic.h but defined in
either pkt_cls.h or pkt_sched.h because they will never be used
by the other side:
- qdisc_walker (pkt_sched.h)
- tcf_walker (pkt_cls.h)
Signed-off-by: Thomas Graf <tgraf@xxxxxxx>
--- linux-2.6.10-rc1-bk1.orig/include/net/sch_generic.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.10-rc1-bk1/include/net/sch_generic.h 2004-10-26
23:18:41.000000000 +0200
@@ -0,0 +1,175 @@
+#ifndef __NET_SCHED_GENERIC_H
+#define __NET_SCHED_GENERIC_H
+
+#include <linux/config.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/module.h>
+#include <linux/rtnetlink.h>
+#include <linux/pkt_sched.h>
+#include <linux/pkt_cls.h>
+#include <net/gen_stats.h>
+
+struct Qdisc_ops;
+struct qdisc_walker;
+struct tcf_walker;
+struct module;
+
+struct qdisc_rate_table
+{
+ struct tc_ratespec rate;
+ u32 data[256];
+ struct qdisc_rate_table *next;
+ int refcnt;
+};
+
+struct Qdisc
+{
+ int (*enqueue)(struct sk_buff *skb, struct Qdisc
*dev);
+ struct sk_buff * (*dequeue)(struct Qdisc *dev);
+ unsigned flags;
+#define TCQ_F_BUILTIN 1
+#define TCQ_F_THROTTLED 2
+#define TCQ_F_INGRESS 4
+ int padded;
+ struct Qdisc_ops *ops;
+ u32 handle;
+ u32 parent;
+ atomic_t refcnt;
+ struct sk_buff_head q;
+ struct net_device *dev;
+ struct list_head list;
+
+ struct gnet_stats_basic bstats;
+ struct gnet_stats_queue qstats;
+ struct gnet_stats_rate_est rate_est;
+ spinlock_t *stats_lock;
+ struct rcu_head q_rcu;
+ int (*reshape_fail)(struct sk_buff *skb,
+ struct Qdisc *q);
+
+ /* This field is deprecated, but it is still used by CBQ
+ * and it will live until better solution will be invented.
+ */
+ struct Qdisc *__parent;
+};
+
+struct Qdisc_class_ops
+{
+ /* Child qdisc manipulation */
+ int (*graft)(struct Qdisc *, unsigned long cl,
+ struct Qdisc *, struct Qdisc **);
+ struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
+
+ /* Class manipulation routines */
+ unsigned long (*get)(struct Qdisc *, u32 classid);
+ void (*put)(struct Qdisc *, unsigned long);
+ int (*change)(struct Qdisc *, u32, u32,
+ struct rtattr **, unsigned long *);
+ int (*delete)(struct Qdisc *, unsigned long);
+ void (*walk)(struct Qdisc *, struct qdisc_walker *
arg);
+
+ /* Filter manipulation */
+ struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long);
+ unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
+ u32 classid);
+ void (*unbind_tcf)(struct Qdisc *, unsigned long);
+
+ /* rtnetlink specific */
+ int (*dump)(struct Qdisc *, unsigned long,
+ struct sk_buff *skb, struct tcmsg*);
+ int (*dump_stats)(struct Qdisc *, unsigned long,
+ struct gnet_dump *);
+};
+
+struct Qdisc_ops
+{
+ struct Qdisc_ops *next;
+ struct Qdisc_class_ops *cl_ops;
+ char id[IFNAMSIZ];
+ int priv_size;
+
+ int (*enqueue)(struct sk_buff *, struct Qdisc *);
+ struct sk_buff * (*dequeue)(struct Qdisc *);
+ int (*requeue)(struct sk_buff *, struct Qdisc *);
+ unsigned int (*drop)(struct Qdisc *);
+
+ int (*init)(struct Qdisc *, struct rtattr *arg);
+ void (*reset)(struct Qdisc *);
+ void (*destroy)(struct Qdisc *);
+ int (*change)(struct Qdisc *, struct rtattr *arg);
+
+ int (*dump)(struct Qdisc *, struct sk_buff *);
+ int (*dump_stats)(struct Qdisc *, struct gnet_dump
*);
+
+ struct module *owner;
+};
+
+
+struct tcf_result
+{
+ unsigned long class;
+ u32 classid;
+};
+
+struct tcf_proto_ops
+{
+ struct tcf_proto_ops *next;
+ char kind[IFNAMSIZ];
+
+ int (*classify)(struct sk_buff*, struct tcf_proto*,
+ struct tcf_result *);
+ int (*init)(struct tcf_proto*);
+ void (*destroy)(struct tcf_proto*);
+
+ unsigned long (*get)(struct tcf_proto*, u32 handle);
+ void (*put)(struct tcf_proto*, unsigned long);
+ int (*change)(struct tcf_proto*, unsigned long,
+ u32 handle, struct rtattr **,
+ unsigned long *);
+ int (*delete)(struct tcf_proto*, unsigned long);
+ void (*walk)(struct tcf_proto*, struct tcf_walker
*arg);
+
+ /* rtnetlink specific */
+ int (*dump)(struct tcf_proto*, unsigned long,
+ struct sk_buff *skb, struct tcmsg*);
+
+ struct module *owner;
+};
+
+struct tcf_proto
+{
+ /* Fast access part */
+ struct tcf_proto *next;
+ void *root;
+ int (*classify)(struct sk_buff*, struct tcf_proto*,
+ struct tcf_result *);
+ u32 protocol;
+
+ /* All the rest */
+ u32 prio;
+ u32 classid;
+ struct Qdisc *q;
+ void *data;
+ struct tcf_proto_ops *ops;
+};
+
+
+extern void qdisc_lock_tree(struct net_device *dev);
+extern void qdisc_unlock_tree(struct net_device *dev);
+
+#define sch_tree_lock(q) qdisc_lock_tree((q)->dev)
+#define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev)
+#define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev)
+#define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev)
+
+static inline void
+tcf_destroy(struct tcf_proto *tp)
+{
+ tp->ops->destroy(tp);
+ module_put(tp->ops->owner);
+ kfree(tp);
+}
+
+#endif
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