* [PATCH 2.5.69] Bridge timer performance enhancement
@ 2003-05-09 20:20 Stephen Hemminger
2003-05-10 4:35 ` David S. Miller
2003-05-14 11:29 ` Jamal Hadi
0 siblings, 2 replies; 3+ messages in thread
From: Stephen Hemminger @ 2003-05-09 20:20 UTC (permalink / raw)
To: David S. Miller; +Cc: netdev, bridge
Existing bridge code was waking up every jiffie then scanning internal
structures for what internal timers had expired. This is a waste of
CPU especially given the efficient kernel timer interface. With this
patch, code should scale better to 1000's of forward table entries and
many ports.
- Change Ethernet bridge to use multiple kernel timers.
- Prevent restarting timers during shutdown.
- Keep ordered list of forward table entries, so oldest entries
show up first; then only older entries need to be scanned.
- Automatically adjust GC interval to the next entry to delete
existing parameter is ignored.
No visible changes to the API or other devices.
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_fdb.c linux-2.5-bridge/net/bridge/br_fdb.c
--- linux-2.5-b1/net/bridge/br_fdb.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_fdb.c 2003-05-09 09:37:28.000000000 -0700
@@ -20,25 +20,19 @@
#include <asm/uaccess.h>
#include "br_private.h"
-static __inline__ unsigned long __timeout(struct net_bridge *br)
+/* if topology_changing then use forward_delay (default 15 sec)
+ * otherwise keep longer (default 5 minutes)
+ */
+static __inline__ unsigned long hold_time(const struct net_bridge *br)
{
- unsigned long timeout;
-
- timeout = jiffies - br->ageing_time;
- if (br->topology_change)
- timeout = jiffies - br->forward_delay;
-
- return timeout;
+ return br->topology_change ? br->forward_delay : br->ageing_time;
}
-static __inline__ int has_expired(struct net_bridge *br,
- struct net_bridge_fdb_entry *fdb)
+static __inline__ int has_expired(const struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb)
{
- if (!fdb->is_static &&
- time_before_eq(fdb->ageing_timer, __timeout(br)))
- return 1;
-
- return 0;
+ return !fdb->is_static
+ && time_before_eq(fdb->ageing_timer + hold_time(br), jiffies);
}
static __inline__ void copy_fdb(struct __fdb_entry *ent,
@@ -52,7 +46,7 @@ static __inline__ void copy_fdb(struct _
: ((jiffies - f->ageing_timer) * USER_HZ) / HZ;
}
-static __inline__ int br_mac_hash(unsigned char *mac)
+static __inline__ int br_mac_hash(const unsigned char *mac)
{
unsigned long x;
@@ -68,7 +62,14 @@ static __inline__ int br_mac_hash(unsign
return x & (BR_HASH_SIZE - 1);
}
-void br_fdb_changeaddr(struct net_bridge_port *p, unsigned char *newaddr)
+static __inline__ void fdb_delete(struct net_bridge_fdb_entry *f)
+{
+ hlist_del(&f->hlist);
+ list_del(&f->age_list);
+ br_fdb_put(f);
+}
+
+void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
{
struct net_bridge *br;
int i;
@@ -98,25 +99,29 @@ void br_fdb_changeaddr(struct net_bridge
write_unlock_bh(&br->hash_lock);
}
-void br_fdb_cleanup(struct net_bridge *br)
+void br_fdb_cleanup(unsigned long _data)
{
- int i;
- unsigned long timeout;
-
- timeout = __timeout(br);
+ struct net_bridge *br = (struct net_bridge *)_data;
+ struct list_head *l, *n;
+ unsigned long delay;
write_lock_bh(&br->hash_lock);
- for (i=0;i<BR_HASH_SIZE;i++) {
- struct hlist_node *h, *g;
-
- hlist_for_each_safe(h, g, &br->hash[i]) {
- struct net_bridge_fdb_entry *f
- = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
- if (!f->is_static &&
- time_before_eq(f->ageing_timer, timeout)) {
- hlist_del(&f->hlist);
- br_fdb_put(f);
+ delay = hold_time(br);
+
+ list_for_each_safe(l, n, &br->age_list) {
+ struct net_bridge_fdb_entry *f
+ = list_entry(l, struct net_bridge_fdb_entry, age_list);
+ unsigned long expires = f->ageing_timer + delay;
+
+ if (time_before_eq(expires, jiffies)) {
+ if (!f->is_static) {
+ pr_debug("expire age %lu jiffies %lu\n",
+ f->ageing_timer, jiffies);
+ fdb_delete(f);
}
+ } else {
+ mod_timer(&br->gc_timer, expires);
+ break;
}
}
write_unlock_bh(&br->hash_lock);
@@ -134,8 +139,7 @@ void br_fdb_delete_by_port(struct net_br
struct net_bridge_fdb_entry *f
= hlist_entry(h, struct net_bridge_fdb_entry, hlist);
if (f->dst == p) {
- hlist_del(&f->hlist);
- br_fdb_put(f);
+ fdb_delete(f);
}
}
}
@@ -237,55 +241,46 @@ int br_fdb_get_entries(struct net_bridge
return num;
}
-static __inline__ void __fdb_possibly_replace(struct net_bridge_fdb_entry *fdb,
- struct net_bridge_port *source,
- int is_local)
-{
- if (!fdb->is_static || is_local) {
- fdb->dst = source;
- fdb->is_local = is_local;
- fdb->is_static = is_local;
- fdb->ageing_timer = jiffies;
- }
-}
-
-void br_fdb_insert(struct net_bridge *br,
- struct net_bridge_port *source,
- unsigned char *addr,
- int is_local)
+void br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr, int is_local)
{
struct hlist_node *h;
struct net_bridge_fdb_entry *fdb;
- int hash;
-
- hash = br_mac_hash(addr);
+ int hash = br_mac_hash(addr);
write_lock_bh(&br->hash_lock);
hlist_for_each(h, &br->hash[hash]) {
fdb = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
if (!fdb->is_local &&
!memcmp(fdb->addr.addr, addr, ETH_ALEN)) {
- __fdb_possibly_replace(fdb, source, is_local);
- write_unlock_bh(&br->hash_lock);
- return;
+ if (likely(!fdb->is_static || is_local)) {
+ /* move to end of age list */
+ list_del(&fdb->age_list);
+ goto update;
+ }
+ goto out;
}
-
}
fdb = kmalloc(sizeof(*fdb), GFP_ATOMIC);
- if (fdb == NULL) {
- write_unlock_bh(&br->hash_lock);
- return;
- }
+ if (fdb == NULL)
+ goto out;
memcpy(fdb->addr.addr, addr, ETH_ALEN);
atomic_set(&fdb->use_count, 1);
+ hlist_add_head(&fdb->hlist, &br->hash[hash]);
+
+ if (!timer_pending(&br->gc_timer)) {
+ br->gc_timer.expires = jiffies + hold_time(br);
+ add_timer(&br->gc_timer);
+ }
+
+ update:
fdb->dst = source;
fdb->is_local = is_local;
fdb->is_static = is_local;
fdb->ageing_timer = jiffies;
-
- hlist_add_head(&fdb->hlist, &br->hash[hash]);
-
+ list_add_tail(&fdb->age_list, &br->age_list);
+ out:
write_unlock_bh(&br->hash_lock);
}
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_if.c linux-2.5-bridge/net/bridge/br_if.c
--- linux-2.5-b1/net/bridge/br_if.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_if.c 2003-05-09 09:37:28.000000000 -0700
@@ -84,8 +84,6 @@ static struct net_bridge *new_nb(const c
memset(br, 0, sizeof(*br));
dev = &br->dev;
- init_timer(&br->tick);
-
strncpy(dev->name, name, IFNAMSIZ);
dev->priv = br;
dev->priv_flags = IFF_EBRIDGE;
@@ -109,12 +107,10 @@ static struct net_bridge *new_nb(const c
br->bridge_forward_delay = br->forward_delay = 15 * HZ;
br->topology_change = 0;
br->topology_change_detected = 0;
- br_timer_clear(&br->hello_timer);
- br_timer_clear(&br->tcn_timer);
- br_timer_clear(&br->topology_change_timer);
-
br->ageing_time = 300 * HZ;
- br->gc_interval = 4 * HZ;
+ INIT_LIST_HEAD(&br->age_list);
+
+ br_stp_timer_init(br);
return br;
}
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_ioctl.c linux-2.5-bridge/net/bridge/br_ioctl.c
--- linux-2.5-b1/net/bridge/br_ioctl.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_ioctl.c 2003-05-09 09:37:28.000000000 -0700
@@ -32,9 +32,10 @@ static inline unsigned long ticks_to_use
}
/* Report time remaining in user HZ */
-static unsigned long timer_residue(const struct br_timer *timer)
+static unsigned long timer_residue(const struct timer_list *timer)
{
- return ticks_to_user(timer->running ? (jiffies - timer->expires) : 0);
+ return ticks_to_user(timer_pending(timer)
+ ? (timer->expires - jiffies) : 0);
}
static int br_ioctl_device(struct net_bridge *br,
@@ -87,7 +88,6 @@ static int br_ioctl_device(struct net_br
b.root_port = br->root_port;
b.stp_enabled = br->stp_enabled;
b.ageing_time = ticks_to_user(br->ageing_time);
- b.gc_interval = ticks_to_user(br->gc_interval);
b.hello_timer_value = timer_residue(&br->hello_timer);
b.tcn_timer_value = timer_residue(&br->tcn_timer);
b.topology_change_timer_value = timer_residue(&br->topology_change_timer);
@@ -146,8 +146,7 @@ static int br_ioctl_device(struct net_br
br->ageing_time = user_to_ticks(arg0);
return 0;
- case BRCTL_SET_GC_INTERVAL:
- br->gc_interval = user_to_ticks(arg0);
+ case BRCTL_SET_GC_INTERVAL: /* no longer used */
return 0;
case BRCTL_GET_PORT_INFO:
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_private.h linux-2.5-bridge/net/bridge/br_private.h
--- linux-2.5-b1/net/bridge/br_private.h 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_private.h 2003-05-09 09:37:28.000000000 -0700
@@ -18,7 +18,6 @@
#include <linux/netdevice.h>
#include <linux/miscdevice.h>
#include <linux/if_bridge.h>
-#include "br_private_timer.h"
#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)
@@ -44,10 +43,11 @@ struct mac_addr
struct net_bridge_fdb_entry
{
struct hlist_node hlist;
- atomic_t use_count;
- mac_addr addr;
struct net_bridge_port *dst;
+ struct list_head age_list;
+ atomic_t use_count;
unsigned long ageing_timer;
+ mac_addr addr;
unsigned is_local:1;
unsigned is_static:1;
};
@@ -71,10 +71,9 @@ struct net_bridge_port
unsigned config_pending:1;
int priority;
- struct br_timer forward_delay_timer;
- struct br_timer hold_timer;
- struct br_timer message_age_timer;
-
+ struct timer_list forward_delay_timer;
+ struct timer_list hold_timer;
+ struct timer_list message_age_timer;
struct rcu_head rcu;
};
@@ -86,7 +85,7 @@ struct net_bridge
struct net_device_stats statistics;
rwlock_t hash_lock;
struct hlist_head hash[BR_HASH_SIZE];
- struct timer_list tick;
+ struct list_head age_list;
/* STP */
bridge_id designated_root;
@@ -103,13 +102,12 @@ struct net_bridge
unsigned topology_change:1;
unsigned topology_change_detected:1;
- struct br_timer hello_timer;
- struct br_timer tcn_timer;
- struct br_timer topology_change_timer;
- struct br_timer gc_timer;
+ struct timer_list hello_timer;
+ struct timer_list tcn_timer;
+ struct timer_list topology_change_timer;
+ struct timer_list gc_timer;
int ageing_time;
- int gc_interval;
};
extern struct notifier_block br_device_notifier;
@@ -128,8 +126,8 @@ extern int br_dev_xmit(struct sk_buff *s
/* br_fdb.c */
extern void br_fdb_changeaddr(struct net_bridge_port *p,
- unsigned char *newaddr);
-extern void br_fdb_cleanup(struct net_bridge *br);
+ const unsigned char *newaddr);
+extern void br_fdb_cleanup(unsigned long arg);
extern void br_fdb_delete_by_port(struct net_bridge *br,
struct net_bridge_port *p);
extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
@@ -140,9 +138,9 @@ extern int br_fdb_get_entries(struct ne
int maxnum,
int offset);
extern void br_fdb_insert(struct net_bridge *br,
- struct net_bridge_port *source,
- unsigned char *addr,
- int is_local);
+ struct net_bridge_port *source,
+ const unsigned char *addr,
+ int is_local);
/* br_forward.c */
extern void br_deliver(const struct net_bridge_port *to,
@@ -188,10 +186,10 @@ extern int br_netfilter_init(void);
extern void br_netfilter_fini(void);
/* br_stp.c */
+extern void br_log_state(const struct net_bridge_port *p);
extern struct net_bridge_port *br_get_port(struct net_bridge *br,
int port_no);
extern void br_init_port(struct net_bridge_port *p);
-extern port_id br_make_port_id(struct net_bridge_port *p);
extern void br_become_designated_port(struct net_bridge_port *p);
/* br_stp_if.c */
@@ -210,4 +208,8 @@ extern void br_stp_set_path_cost(struct
/* br_stp_bpdu.c */
extern void br_stp_handle_bpdu(struct sk_buff *skb);
+/* br_stp_timer.c */
+extern void br_stp_timer_init(struct net_bridge *br);
+extern void br_stp_port_timer_init(struct net_bridge_port *p);
+
#endif
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_private_stp.h linux-2.5-bridge/net/bridge/br_private_stp.h
--- linux-2.5-b1/net/bridge/br_private_stp.h 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_private_stp.h 2003-05-07 15:11:52.000000000 -0700
@@ -47,7 +47,6 @@ extern void br_configuration_update(stru
extern void br_port_state_selection(struct net_bridge *);
extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
extern void br_received_tcn_bpdu(struct net_bridge_port *p);
-extern void br_tick(unsigned long __data);
extern void br_transmit_config(struct net_bridge_port *p);
extern void br_transmit_tcn(struct net_bridge *br);
extern void br_topology_change_detection(struct net_bridge *br);
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_private_timer.h linux-2.5-bridge/net/bridge/br_private_timer.h
--- linux-2.5-b1/net/bridge/br_private_timer.h 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_private_timer.h 1969-12-31 16:00:00.000000000 -0800
@@ -1,54 +0,0 @@
-/*
- * Linux ethernet bridge
- *
- * Authors:
- * Lennert Buytenhek <buytenh@gnu.org>
- *
- * $Id: br_private_timer.h,v 1.1 2000/02/18 16:47:13 davem Exp $
- *
- * 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.
- */
-
-#ifndef _BR_PRIVATE_TIMER_H
-#define _BR_PRIVATE_TIMER_H
-
-struct br_timer
-{
- int running;
- unsigned long expires;
-};
-
-extern __inline__ void br_timer_clear(struct br_timer *t)
-{
- t->running = 0;
-}
-
-extern __inline__ unsigned long br_timer_get_residue(struct br_timer *t)
-{
- if (t->running)
- return jiffies - t->expires;
-
- return 0;
-}
-
-extern __inline__ void br_timer_set(struct br_timer *t, unsigned long x)
-{
- t->expires = x;
- t->running = 1;
-}
-
-extern __inline__ int br_timer_is_running(struct br_timer *t)
-{
- return t->running;
-}
-
-extern __inline__ int br_timer_has_expired(struct br_timer *t, unsigned long to)
-{
- return t->running && time_after_eq(jiffies, t->expires + to);
-}
-
-
-#endif
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_stp.c linux-2.5-bridge/net/bridge/br_stp.c
--- linux-2.5-b1/net/bridge/br_stp.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_stp.c 2003-05-09 09:26:05.000000000 -0700
@@ -12,7 +12,6 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
-
#include <linux/kernel.h>
#include <linux/if_bridge.h>
#include <linux/smp_lock.h>
@@ -20,6 +19,18 @@
#include "br_private.h"
#include "br_private_stp.h"
+static const char *br_port_state_names[] = {
+ "disabled", "learning", "forwarding", "blocking",
+};
+
+void br_log_state(const struct net_bridge_port *p)
+{
+ pr_info("%s: port %d(%s) entering %s state\n",
+ p->br->dev.name, p->port_no, p->dev->name,
+ br_port_state_names[p->state]);
+
+}
+
/* called under bridge lock */
struct net_bridge_port *br_get_port(struct net_bridge *br, int port_no)
{
@@ -34,7 +45,8 @@ struct net_bridge_port *br_get_port(stru
}
/* called under bridge lock */
-static int br_should_become_root_port(struct net_bridge_port *p, int root_port)
+static int br_should_become_root_port(const struct net_bridge_port *p,
+ int root_port)
{
struct net_bridge *br;
struct net_bridge_port *rp;
@@ -116,9 +128,12 @@ void br_become_root_bridge(struct net_br
br->hello_time = br->bridge_hello_time;
br->forward_delay = br->bridge_forward_delay;
br_topology_change_detection(br);
- br_timer_clear(&br->tcn_timer);
- br_config_bpdu_generation(br);
- br_timer_set(&br->hello_timer, jiffies);
+ del_timer(&br->tcn_timer);
+
+ if (br->dev.flags & IFF_UP) {
+ br_config_bpdu_generation(br);
+ mod_timer(&br->hello_timer, jiffies + br->hello_time);
+ }
}
/* called under bridge lock */
@@ -127,7 +142,8 @@ void br_transmit_config(struct net_bridg
struct br_config_bpdu bpdu;
struct net_bridge *br;
- if (br_timer_is_running(&p->hold_timer)) {
+
+ if (timer_pending(&p->hold_timer)) {
p->config_pending = 1;
return;
}
@@ -142,12 +158,11 @@ void br_transmit_config(struct net_bridg
bpdu.port_id = p->port_id;
bpdu.message_age = 0;
if (!br_is_root_bridge(br)) {
- struct net_bridge_port *root;
- unsigned long age;
+ struct net_bridge_port *root
+ = br_get_port(br, br->root_port);
+ bpdu.max_age = root->message_age_timer.expires - jiffies;
- root = br_get_port(br, br->root_port);
- age = br_timer_get_residue(&root->message_age_timer) + 1;
- bpdu.message_age = age;
+ if (bpdu.max_age <= 0) bpdu.max_age = 1;
}
bpdu.max_age = br->max_age;
bpdu.hello_time = br->hello_time;
@@ -157,22 +172,26 @@ void br_transmit_config(struct net_bridg
p->topology_change_ack = 0;
p->config_pending = 0;
- br_timer_set(&p->hold_timer, jiffies);
+
+ mod_timer(&p->hold_timer, jiffies + BR_HOLD_TIME);
}
/* called under bridge lock */
-static void br_record_config_information(struct net_bridge_port *p, struct br_config_bpdu *bpdu)
+static inline void br_record_config_information(struct net_bridge_port *p,
+ const struct br_config_bpdu *bpdu)
{
p->designated_root = bpdu->root;
p->designated_cost = bpdu->root_path_cost;
p->designated_bridge = bpdu->bridge_id;
p->designated_port = bpdu->port_id;
- br_timer_set(&p->message_age_timer, jiffies - bpdu->message_age);
+ mod_timer(&p->message_age_timer, jiffies
+ + (p->br->max_age - bpdu->message_age));
}
/* called under bridge lock */
-static void br_record_config_timeout_values(struct net_bridge *br, struct br_config_bpdu *bpdu)
+static inline void br_record_config_timeout_values(struct net_bridge *br,
+ const struct br_config_bpdu *bpdu)
{
br->max_age = bpdu->max_age;
br->hello_time = bpdu->hello_time;
@@ -187,7 +206,7 @@ void br_transmit_tcn(struct net_bridge *
}
/* called under bridge lock */
-static int br_should_become_designated_port(struct net_bridge_port *p)
+static int br_should_become_designated_port(const struct net_bridge_port *p)
{
struct net_bridge *br;
int t;
@@ -261,25 +280,28 @@ static int br_supersedes_port_info(struc
}
/* called under bridge lock */
-static void br_topology_change_acknowledged(struct net_bridge *br)
+static inline void br_topology_change_acknowledged(struct net_bridge *br)
{
br->topology_change_detected = 0;
- br_timer_clear(&br->tcn_timer);
+ del_timer(&br->tcn_timer);
}
/* called under bridge lock */
void br_topology_change_detection(struct net_bridge *br)
{
- printk(KERN_INFO "%s: topology change detected", br->dev.name);
+ if (!(br->dev.flags & IFF_UP))
+ return;
+ pr_info("%s: topology change detected", br->dev.name);
if (br_is_root_bridge(br)) {
printk(", propagating");
br->topology_change = 1;
- br_timer_set(&br->topology_change_timer, jiffies);
+ mod_timer(&br->topology_change_timer, jiffies
+ + br->bridge_forward_delay + br->bridge_max_age);
} else if (!br->topology_change_detected) {
printk(", sending tcn bpdu");
br_transmit_tcn(br);
- br_timer_set(&br->tcn_timer, jiffies);
+ mod_timer(&br->tcn_timer, jiffies + br->bridge_hello_time);
}
printk("\n");
@@ -299,7 +321,7 @@ void br_config_bpdu_generation(struct ne
}
/* called under bridge lock */
-static void br_reply(struct net_bridge_port *p)
+static inline void br_reply(struct net_bridge_port *p)
{
br_transmit_config(p);
}
@@ -323,6 +345,7 @@ void br_become_designated_port(struct ne
p->designated_port = p->port_id;
}
+
/* called under bridge lock */
static void br_make_blocking(struct net_bridge_port *p)
{
@@ -332,11 +355,9 @@ static void br_make_blocking(struct net_
p->state == BR_STATE_LEARNING)
br_topology_change_detection(p->br);
- printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
- p->br->dev.name, p->port_no, p->dev->name, "blocking");
-
p->state = BR_STATE_BLOCKING;
- br_timer_clear(&p->forward_delay_timer);
+ br_log_state(p);
+ del_timer(&p->forward_delay_timer);
}
}
@@ -345,20 +366,12 @@ static void br_make_forwarding(struct ne
{
if (p->state == BR_STATE_BLOCKING) {
if (p->br->stp_enabled) {
- printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
- p->br->dev.name, p->port_no, p->dev->name,
- "listening");
-
p->state = BR_STATE_LISTENING;
} else {
- printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
- p->br->dev.name, p->port_no, p->dev->name,
- "learning");
-
p->state = BR_STATE_LEARNING;
}
- br_timer_set(&p->forward_delay_timer, jiffies);
- }
+ br_log_state(p);
+ mod_timer(&p->forward_delay_timer, jiffies + p->br->forward_delay); }
}
/* called under bridge lock */
@@ -373,7 +386,7 @@ void br_port_state_selection(struct net_
p->topology_change_ack = 0;
br_make_forwarding(p);
} else if (br_is_designated_port(p)) {
- br_timer_clear(&p->message_age_timer);
+ del_timer(&p->message_age_timer);
br_make_forwarding(p);
} else {
p->config_pending = 0;
@@ -381,11 +394,12 @@ void br_port_state_selection(struct net_
br_make_blocking(p);
}
}
+
}
}
/* called under bridge lock */
-static void br_topology_change_acknowledge(struct net_bridge_port *p)
+static inline void br_topology_change_acknowledge(struct net_bridge_port *p)
{
p->topology_change_ack = 1;
br_transmit_config(p);
@@ -396,20 +410,23 @@ void br_received_config_bpdu(struct net_
{
struct net_bridge *br;
int was_root;
-
+
br = p->br;
was_root = br_is_root_bridge(br);
+
if (br_supersedes_port_info(p, bpdu)) {
br_record_config_information(p, bpdu);
br_configuration_update(br);
br_port_state_selection(br);
if (!br_is_root_bridge(br) && was_root) {
- br_timer_clear(&br->hello_timer);
+ del_timer(&br->hello_timer);
if (br->topology_change_detected) {
- br_timer_clear(&br->topology_change_timer);
+ del_timer(&br->topology_change_timer);
br_transmit_tcn(br);
- br_timer_set(&br->tcn_timer, jiffies);
+
+ mod_timer(&br->tcn_timer,
+ jiffies + br->bridge_hello_time);
}
}
@@ -428,7 +445,7 @@ void br_received_config_bpdu(struct net_
void br_received_tcn_bpdu(struct net_bridge_port *p)
{
if (br_is_designated_port(p)) {
- printk(KERN_INFO "%s: received tcn bpdu on port %i(%s)\n",
+ pr_info("%s: received tcn bpdu on port %i(%s)\n",
p->br->dev.name, p->port_no, p->dev->name);
br_topology_change_detection(p->br);
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_stp_if.c linux-2.5-bridge/net/bridge/br_stp_if.c
--- linux-2.5-b1/net/bridge/br_stp_if.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_stp_if.c 2003-05-09 09:37:28.000000000 -0700
@@ -20,7 +20,7 @@
#include "br_private.h"
#include "br_private_stp.h"
-__u16 br_make_port_id(struct net_bridge_port *p)
+static inline __u16 br_make_port_id(const struct net_bridge_port *p)
{
return (p->priority << 8) | p->port_no;
}
@@ -33,33 +33,25 @@ void br_init_port(struct net_bridge_port
p->state = BR_STATE_BLOCKING;
p->topology_change_ack = 0;
p->config_pending = 0;
- br_timer_clear(&p->message_age_timer);
- br_timer_clear(&p->forward_delay_timer);
- br_timer_clear(&p->hold_timer);
+
+ br_stp_port_timer_init(p);
}
/* called under bridge lock */
void br_stp_enable_bridge(struct net_bridge *br)
{
struct net_bridge_port *p;
- struct timer_list *timer = &br->tick;
spin_lock_bh(&br->lock);
- init_timer(timer);
- timer->data = (unsigned long) br;
- timer->function = br_tick;
- timer->expires = jiffies + 1;
- add_timer(timer);
-
- br_timer_set(&br->hello_timer, jiffies);
+ br->hello_timer.expires = jiffies + br->hello_time;
+ add_timer(&br->hello_timer);
br_config_bpdu_generation(br);
list_for_each_entry(p, &br->port_list, list) {
if (p->dev->flags & IFF_UP)
br_stp_enable_port(p);
- }
- br_timer_set(&br->gc_timer, jiffies);
+ }
spin_unlock_bh(&br->lock);
}
@@ -68,22 +60,22 @@ void br_stp_disable_bridge(struct net_br
{
struct net_bridge_port *p;
- spin_lock_bh(&br->lock);
- br->topology_change = 0;
- br->topology_change_detected = 0;
- br_timer_clear(&br->hello_timer);
- br_timer_clear(&br->topology_change_timer);
- br_timer_clear(&br->tcn_timer);
- br_timer_clear(&br->gc_timer);
- br_fdb_cleanup(br);
-
+ spin_lock(&br->lock);
list_for_each_entry(p, &br->port_list, list) {
if (p->state != BR_STATE_DISABLED)
br_stp_disable_port(p);
+
}
- spin_unlock_bh(&br->lock);
- del_timer_sync(&br->tick);
+ br->topology_change = 0;
+ br->topology_change_detected = 0;
+ spin_unlock(&br->lock);
+
+ del_timer_sync(&br->hello_timer);
+ del_timer_sync(&br->topology_change_timer);
+ del_timer_sync(&br->tcn_timer);
+ del_timer_sync(&br->gc_timer);
+
}
/* called under bridge lock */
@@ -108,10 +100,13 @@ void br_stp_disable_port(struct net_brid
p->state = BR_STATE_DISABLED;
p->topology_change_ack = 0;
p->config_pending = 0;
- br_timer_clear(&p->message_age_timer);
- br_timer_clear(&p->forward_delay_timer);
- br_timer_clear(&p->hold_timer);
+
+ del_timer(&p->message_age_timer);
+ del_timer(&p->forward_delay_timer);
+ del_timer(&p->hold_timer);
+
br_configuration_update(br);
+
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
diff -urNp -X dontdiff linux-2.5-b1/net/bridge/br_stp_timer.c linux-2.5-bridge/net/bridge/br_stp_timer.c
--- linux-2.5-b1/net/bridge/br_stp_timer.c 2003-05-09 11:58:20.000000000 -0700
+++ linux-2.5-bridge/net/bridge/br_stp_timer.c 2003-05-09 09:37:28.000000000 -0700
@@ -20,51 +20,59 @@
#include "br_private.h"
#include "br_private_stp.h"
-static void dump_bridge_id(bridge_id *id)
-{
- printk("%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", id->prio[0],
- id->prio[1], id->addr[0], id->addr[1], id->addr[2], id->addr[3],
- id->addr[4], id->addr[5]);
-}
-
/* called under bridge lock */
-static int br_is_designated_for_some_port(struct net_bridge *br)
+static int br_is_designated_for_some_port(const struct net_bridge *br)
{
struct net_bridge_port *p;
list_for_each_entry(p, &br->port_list, list) {
if (p->state != BR_STATE_DISABLED &&
- !memcmp(&p->designated_bridge, &br->bridge_id, 8))
+ !memcmp(&p->designated_bridge, &br->bridge_id, 8))
return 1;
}
return 0;
}
-/* called under bridge lock */
-static void br_hello_timer_expired(struct net_bridge *br)
+static void br_hello_timer_expired(unsigned long arg)
{
- br_config_bpdu_generation(br);
- br_timer_set(&br->hello_timer, jiffies);
+ struct net_bridge *br = (struct net_bridge *)arg;
+
+ pr_debug("%s: hello timer expired\n", br->dev.name);
+ spin_lock_bh(&br->lock);
+ if (br->dev.flags & IFF_UP) {
+ br_config_bpdu_generation(br);
+
+ br->hello_timer.expires = jiffies + br->hello_time;
+ add_timer(&br->hello_timer);
+ }
+ spin_unlock_bh(&br->lock);
}
-/* called under bridge lock */
-static void br_message_age_timer_expired(struct net_bridge_port *p)
+static void br_message_age_timer_expired(unsigned long arg)
{
- struct net_bridge *br;
+ struct net_bridge_port *p = (struct net_bridge_port *) arg;
+ struct net_bridge *br = p->br;
+ const bridge_id *id = &p->designated_bridge;
int was_root;
- br = p->br;
- printk(KERN_INFO "%s: ", br->dev.name);
- printk("neighbour ");
- dump_bridge_id(&p->designated_bridge);
- printk(" lost on port %i(%s)\n", p->port_no, p->dev->name);
+ if (p->state == BR_STATE_DISABLED)
+ return;
+
+
+ pr_info("%s: neighbor %.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x lost on port %d(%s)\n",
+ br->dev.name,
+ id->prio[0], id->prio[1],
+ id->addr[0], id->addr[1], id->addr[2],
+ id->addr[3], id->addr[4], id->addr[5],
+ p->port_no, p->dev->name);
/*
* According to the spec, the message age timer cannot be
* running when we are the root bridge. So.. this was_root
* check is redundant. I'm leaving it in for now, though.
*/
+ spin_lock_bh(&br->lock);
was_root = br_is_root_bridge(br);
br_become_designated_port(p);
@@ -72,107 +80,101 @@ static void br_message_age_timer_expired
br_port_state_selection(br);
if (br_is_root_bridge(br) && !was_root)
br_become_root_bridge(br);
+ spin_unlock_bh(&br->lock);
}
-/* called under bridge lock */
-static void br_forward_delay_timer_expired(struct net_bridge_port *p)
+static void br_forward_delay_timer_expired(unsigned long arg)
{
- if (p->state == BR_STATE_LISTENING) {
- printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
- p->br->dev.name, p->port_no, p->dev->name, "learning");
+ struct net_bridge_port *p = (struct net_bridge_port *) arg;
+ struct net_bridge *br = p->br;
+ pr_debug("%s: %d(%s) forward delay timer\n",
+ br->dev.name, p->port_no, p->dev->name);
+ spin_lock_bh(&br->lock);
+ if (p->state == BR_STATE_LISTENING) {
p->state = BR_STATE_LEARNING;
- br_timer_set(&p->forward_delay_timer, jiffies);
+ p->forward_delay_timer.expires = jiffies + br->forward_delay;
+ add_timer(&p->forward_delay_timer);
} else if (p->state == BR_STATE_LEARNING) {
- printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
- p->br->dev.name, p->port_no, p->dev->name, "forwarding");
-
p->state = BR_STATE_FORWARDING;
- if (br_is_designated_for_some_port(p->br))
- br_topology_change_detection(p->br);
+ if (br_is_designated_for_some_port(br))
+ br_topology_change_detection(br);
}
+ br_log_state(p);
+ spin_unlock_bh(&br->lock);
}
-/* called under bridge lock */
-static void br_tcn_timer_expired(struct net_bridge *br)
+static void br_tcn_timer_expired(unsigned long arg)
{
- printk(KERN_INFO "%s: retransmitting tcn bpdu\n", br->dev.name);
- br_transmit_tcn(br);
- br_timer_set(&br->tcn_timer, jiffies);
+ struct net_bridge *br = (struct net_bridge *) arg;
+
+ pr_debug("%s: tcn timer expired\n", br->dev.name);
+ spin_lock_bh(&br->lock);
+ if (br->dev.flags & IFF_UP) {
+ br_transmit_tcn(br);
+
+ br->tcn_timer.expires = jiffies + br->bridge_hello_time;
+ add_timer(&br->tcn_timer);
+ }
+ spin_unlock_bh(&br->lock);
}
-/* called under bridge lock */
-static void br_topology_change_timer_expired(struct net_bridge *br)
+static void br_topology_change_timer_expired(unsigned long arg)
{
+ struct net_bridge *br = (struct net_bridge *) arg;
+
+ pr_debug("%s: topo change timer expired\n", br->dev.name);
+ spin_lock_bh(&br->lock);
br->topology_change_detected = 0;
br->topology_change = 0;
+ spin_unlock_bh(&br->lock);
}
-/* called under bridge lock */
-static void br_hold_timer_expired(struct net_bridge_port *p)
+static void br_hold_timer_expired(unsigned long arg)
{
+ struct net_bridge_port *p = (struct net_bridge_port *) arg;
+
+ pr_debug("%s: %d(%s) hold timer expired\n",
+ p->br->dev.name, p->port_no, p->dev->name);
+
+ spin_lock_bh(&p->br->lock);
if (p->config_pending)
br_transmit_config(p);
+ spin_unlock_bh(&p->br->lock);
}
-/* called under bridge lock */
-static void br_check_port_timers(struct net_bridge_port *p)
+static inline void br_timer_init(struct timer_list *timer,
+ void (*_function)(unsigned long),
+ unsigned long _data)
{
- if (br_timer_has_expired(&p->message_age_timer, p->br->max_age)) {
- br_timer_clear(&p->message_age_timer);
- br_message_age_timer_expired(p);
- }
-
- if (br_timer_has_expired(&p->forward_delay_timer, p->br->forward_delay)) {
- br_timer_clear(&p->forward_delay_timer);
- br_forward_delay_timer_expired(p);
- }
-
- if (br_timer_has_expired(&p->hold_timer, BR_HOLD_TIME)) {
- br_timer_clear(&p->hold_timer);
- br_hold_timer_expired(p);
- }
+ init_timer(timer);
+ timer->function = _function;
+ timer->data = _data;
}
-/* called under bridge lock */
-static void br_check_timers(struct net_bridge *br)
+void br_stp_timer_init(struct net_bridge *br)
{
- struct net_bridge_port *p;
+ br_timer_init(&br->hello_timer, br_hello_timer_expired,
+ (unsigned long) br);
- if (br_timer_has_expired(&br->gc_timer, br->gc_interval)) {
- br_timer_set(&br->gc_timer, jiffies);
- br_fdb_cleanup(br);
- }
+ br_timer_init(&br->tcn_timer, br_tcn_timer_expired,
+ (unsigned long) br);
- if (br_timer_has_expired(&br->hello_timer, br->hello_time)) {
- br_timer_clear(&br->hello_timer);
- br_hello_timer_expired(br);
- }
-
- if (br_timer_has_expired(&br->tcn_timer, br->bridge_hello_time)) {
- br_timer_clear(&br->tcn_timer);
- br_tcn_timer_expired(br);
- }
-
- if (br_timer_has_expired(&br->topology_change_timer, br->bridge_forward_delay + br->bridge_max_age)) {
- br_timer_clear(&br->topology_change_timer);
- br_topology_change_timer_expired(br);
- }
+ br_timer_init(&br->topology_change_timer,
+ br_topology_change_timer_expired,
+ (unsigned long) br);
- list_for_each_entry(p, &br->port_list, list) {
- if (p->state != BR_STATE_DISABLED)
- br_check_port_timers(p);
- }
+ br_timer_init(&br->gc_timer, br_fdb_cleanup, (unsigned long) br);
}
-void br_tick(unsigned long __data)
+void br_stp_port_timer_init(struct net_bridge_port *p)
{
- struct net_bridge *br = (struct net_bridge *)__data;
+ br_timer_init(&p->message_age_timer, br_message_age_timer_expired,
+ (unsigned long) p);
- if (spin_trylock_bh(&br->lock)) {
- br_check_timers(br);
- spin_unlock_bh(&br->lock);
- }
- br->tick.expires = jiffies + 1;
- add_timer(&br->tick);
-}
+ br_timer_init(&p->forward_delay_timer, br_forward_delay_timer_expired,
+ (unsigned long) p);
+
+ br_timer_init(&p->hold_timer, br_hold_timer_expired,
+ (unsigned long) p);
+}
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH 2.5.69] Bridge timer performance enhancement
2003-05-09 20:20 [PATCH 2.5.69] Bridge timer performance enhancement Stephen Hemminger
@ 2003-05-10 4:35 ` David S. Miller
2003-05-14 11:29 ` Jamal Hadi
1 sibling, 0 replies; 3+ messages in thread
From: David S. Miller @ 2003-05-10 4:35 UTC (permalink / raw)
To: shemminger; +Cc: netdev, bridge
From: Stephen Hemminger <shemminger@osdl.org>
Date: Fri, 9 May 2003 13:20:12 -0700
Existing bridge code was waking up every jiffie then scanning
internal structures for what internal timers had expired.
You're going to have to redo the rest of these bridging
patches since I'm not going to apply the one which kills off
destructor usage.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 2.5.69] Bridge timer performance enhancement
2003-05-09 20:20 [PATCH 2.5.69] Bridge timer performance enhancement Stephen Hemminger
2003-05-10 4:35 ` David S. Miller
@ 2003-05-14 11:29 ` Jamal Hadi
1 sibling, 0 replies; 3+ messages in thread
From: Jamal Hadi @ 2003-05-14 11:29 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: David S. Miller, netdev, bridge
Stephen,
Seems you are the new maintainer to the bridging code? I suppose Lennert
is still still listening in the background somewhere. One thing we should
do post 2.6 is move all the STP protocol specific out of the kernel.
i.e leave the datapath controllers (such as controlling STP states)
in the kernel but have a user sapce daemon. This way you can start adding
a lot more feature rich extensions in user space without waiting for
kernel releases or having kernel patches (Fast Forward etc).
A second item is to start looking at integrating STP with the VLAN code.
Too bad Lennert (and someone else - cant remember the name) VLAN code
never made it in. We can still fix this.
cheers,
jamal
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2003-05-14 11:29 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2003-05-09 20:20 [PATCH 2.5.69] Bridge timer performance enhancement Stephen Hemminger
2003-05-10 4:35 ` David S. Miller
2003-05-14 11:29 ` Jamal Hadi
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