Generic network statistics API for netlink users.
Signed-off-by: Thomas Graf <tgraf@xxxxxxx>
--- linux-2.6.9-rc3.orig/include/net/gen_stats.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc3/include/net/gen_stats.h 2004-10-03 22:18:55.000000000
+0200
@@ -0,0 +1,45 @@
+#ifndef __NET_GEN_STATS_H
+#define __NET_GEN_STATS_H
+
+#include <linux/gen_stats.h>
+#include <linux/socket.h>
+#include <linux/rtnetlink.h>
+#include <linux/pkt_sched.h>
+
+struct gnet_dump
+{
+ spinlock_t * lock;
+ struct sk_buff * skb;
+ struct rtattr * tail;
+
+ /* Backward compatability */
+ int compat_tc_stats;
+ int compat_xstats;
+ struct rtattr * xstats;
+ struct tc_stats tc_stats;
+};
+
+extern int gnet_stats_start_copy(struct sk_buff *skb, int type,
+ spinlock_t *lock, struct gnet_dump *d);
+
+extern int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
+ int tc_stats_type,int xstats_type,
+ spinlock_t *lock, struct gnet_dump *d);
+
+extern int gnet_stats_copy_basic(struct gnet_dump *d,
+ struct gnet_stats_basic *b);
+extern int gnet_stats_copy_rate_est(struct gnet_dump *d,
+ struct gnet_stats_rate_est *r);
+extern int gnet_stats_copy_queue(struct gnet_dump *d,
+ struct gnet_stats_queue *q);
+extern int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);
+
+extern int gnet_stats_finish_copy(struct gnet_dump *d);
+
+extern int gen_new_estimator(struct gnet_stats_basic *bstats,
+ struct gnet_stats_rate_est *rate_est,
+ spinlock_t *stats_lock, struct rtattr *opt);
+extern void gen_kill_estimator(struct gnet_stats_basic *bstats,
+ struct gnet_stats_rate_est *rate_est);
+
+#endif
--- linux-2.6.9-rc3.orig/include/linux/gen_stats.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc3/include/linux/gen_stats.h 2004-10-03 22:58:21.000000000
+0200
@@ -0,0 +1,50 @@
+#ifndef __LINUX_GEN_STATS_H
+#define __LINUX_GEN_STATS_H
+
+#include <linux/types.h>
+
+enum {
+ TCA_STATS_UNSPEC,
+ TCA_STATS_BASIC,
+ TCA_STATS_RATE_EST,
+ TCA_STATS_QUEUE,
+ TCA_STATS_APP,
+ __TCA_STATS_MAX,
+};
+#define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
+
+/**
+ * @bytes: number of seen bytes
+ * @packets: number of seen packets
+ */
+struct gnet_stats_basic
+{
+ __u64 bytes;
+ __u32 packets;
+};
+
+/**
+ * @bps: current byte rate
+ * @pps: current packet rate
+ */
+struct gnet_stats_rate_est
+{
+ __u32 bps;
+ __u32 pps;
+};
+
+/**
+ * @qlen: queue length
+ * @backlog: backlog size of queue
+ * @drops: number of dropped packets
+ * @requeues: number of requeues
+ */
+struct gnet_stats_queue
+{
+ __u32 qlen;
+ __u32 backlog;
+ __u32 drops;
+ __u32 requeues;
+ __u32 overlimits;
+};
+#endif /* __LINUX_GEN_STATS_H */
--- linux-2.6.9-rc3.orig/net/core/gen_stats.c 1970-01-01 01:00:00.000000000
+0100
+++ linux-2.6.9-rc3/net/core/gen_stats.c 2004-10-03 22:22:43.000000000
+0200
@@ -0,0 +1,132 @@
+/*
+ * net/core/gen_stats.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Thomas Graf <tgraf@xxxxxxx>
+ * Jamal Hadi Salim
+ * Alexey Kuznetsov, <kuznet@xxxxxxxxxxxxx>
+ *
+ * See Documentation/networking/gen_stats.txt
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/socket.h>
+#include <linux/rtnetlink.h>
+#include <linux/gen_stats.h>
+#include <net/gen_stats.h>
+
+
+static inline int
+gnet_stats_copy(struct gnet_dump *d, int type, void *buf, int size)
+{
+ RTA_PUT(d->skb, type, size, buf);
+ return 0;
+
+rtattr_failure:
+ spin_unlock_bh(d->lock);
+ return -1;
+}
+
+int
+gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
+ int xstats_type, spinlock_t *lock, struct gnet_dump *d)
+{
+ spin_lock_bh(lock);
+ d->lock = lock;
+ d->tail = (struct rtattr *) skb->tail;
+ d->skb = skb;
+ d->compat_tc_stats = tc_stats_type;
+ d->compat_xstats = xstats_type;
+ d->xstats = NULL;
+
+ if (d->compat_tc_stats)
+ memset(&d->tc_stats, 0, sizeof(d->tc_stats));
+
+ return gnet_stats_copy(d, type, NULL, 0);
+}
+
+int
+gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
+ struct gnet_dump *d)
+{
+ return gnet_stats_start_copy_compat(skb, type, 0, 0, lock, d);
+}
+
+
+int
+gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic *b)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.bytes = b->bytes;
+ d->tc_stats.packets = b->packets;
+ }
+
+ return gnet_stats_copy(d, TCA_STATS_BASIC, b, sizeof(*b));
+}
+
+int
+gnet_stats_copy_rate_est(struct gnet_dump *d, struct gnet_stats_rate_est *r)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.bps = r->bps;
+ d->tc_stats.pps = r->pps;
+ }
+
+ return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
+}
+
+int
+gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.drops = q->drops;
+ d->tc_stats.qlen = q->qlen;
+ d->tc_stats.backlog = q->backlog;
+ d->tc_stats.overlimits = q->overlimits;
+ }
+
+ return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
+}
+
+int
+gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
+{
+ if (d->compat_xstats)
+ d->xstats = (struct rtattr *) d->skb->tail;
+ return gnet_stats_copy(d, TCA_STATS_APP, st, len);
+}
+
+int
+gnet_stats_finish_copy(struct gnet_dump *d)
+{
+ d->tail->rta_len = d->skb->tail - (u8 *) d->tail;
+
+ if (d->compat_tc_stats)
+ if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
+ sizeof(d->tc_stats)) < 0)
+ return -1;
+
+ if (d->compat_xstats && d->xstats) {
+ if (gnet_stats_copy(d, d->compat_xstats, RTA_DATA(d->xstats),
+ RTA_PAYLOAD(d->xstats)) < 0)
+ return -1;
+ }
+
+ spin_unlock_bh(d->lock);
+ return 0;
+}
+
+
+EXPORT_SYMBOL(gnet_stats_start_copy);
+EXPORT_SYMBOL(gnet_stats_copy_basic);
+EXPORT_SYMBOL(gnet_stats_copy_rate_est);
+EXPORT_SYMBOL(gnet_stats_copy_queue);
+EXPORT_SYMBOL(gnet_stats_copy_app);
+EXPORT_SYMBOL(gnet_stats_finish_copy);
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