From: Stephen Hemminger <shemminger@vyatta•com>
To: "David S. Miller" <davem@davemloft•net>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6•org>
Cc: netdev@vger•kernel.org
Subject: [PATCH 05/12] ipv6: convert addrconf list to hlist
Date: Tue, 02 Mar 2010 15:32:48 -0800 [thread overview]
Message-ID: <20100302234003.191561399@vyatta.com> (raw)
In-Reply-To: 20100302233243.259794027@vyatta.com
[-- Attachment #1: ipv6-addrconf-hlist.patch --]
[-- Type: text/plain, Size: 9363 bytes --]
Using hash list macros, simplifies code and helps later RCU.
This patch includes some initialization that is not strictly necessary,
since an empty hlist node/list is all zero; and list is in BSS
and node is allocated with kzalloc.
Signed-off-by: Stephen Hemminger <shemminger@vyatta•com>
---
include/net/if_inet6.h | 2
net/ipv6/addrconf.c | 128 ++++++++++++++++++++-----------------------------
2 files changed, 54 insertions(+), 76 deletions(-)
--- a/net/ipv6/addrconf.c 2010-03-02 14:20:10.473202008 -0800
+++ b/net/ipv6/addrconf.c 2010-03-02 14:25:23.173252540 -0800
@@ -126,7 +126,7 @@ static int ipv6_count_addresses(struct i
/*
* Configured unicast address hash table
*/
-static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
+static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
static DEFINE_RWLOCK(addrconf_hash_lock);
static void addrconf_verify(unsigned long);
@@ -528,7 +528,7 @@ static int addrconf_fixup_forwarding(str
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
{
WARN_ON(ifp->if_next != NULL);
- WARN_ON(ifp->lst_next != NULL);
+ WARN_ON(!hlist_unhashed(&ifp->addr_lst));
#ifdef NET_REFCNT_DEBUG
printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
@@ -643,6 +643,7 @@ ipv6_add_addr(struct inet6_dev *idev, co
spin_lock_init(&ifa->lock);
init_timer(&ifa->timer);
+ INIT_HLIST_NODE(&ifa->addr_lst);
ifa->timer.data = (unsigned long) ifa;
ifa->scope = scope;
ifa->prefix_len = pfxlen;
@@ -669,8 +670,7 @@ ipv6_add_addr(struct inet6_dev *idev, co
/* Add to big hash table */
hash = ipv6_addr_hash(addr);
- ifa->lst_next = inet6_addr_lst[hash];
- inet6_addr_lst[hash] = ifa;
+ hlist_add_head(&ifa->addr_lst, &inet6_addr_lst[hash]);
in6_ifa_hold(ifa);
write_unlock(&addrconf_hash_lock);
@@ -718,15 +718,8 @@ static void ipv6_del_addr(struct inet6_i
ifp->dead = 1;
write_lock_bh(&addrconf_hash_lock);
- for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
- ifap = &ifa->lst_next) {
- if (ifa == ifp) {
- *ifap = ifa->lst_next;
- __in6_ifa_put(ifp);
- ifa->lst_next = NULL;
- break;
- }
- }
+ hlist_del_init(&ifp->addr_lst);
+ __in6_ifa_put(ifp);
write_unlock_bh(&addrconf_hash_lock);
write_lock_bh(&idev->lock);
@@ -1277,11 +1270,12 @@ static int ipv6_count_addresses(struct i
int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
struct net_device *dev, int strict)
{
- struct inet6_ifaddr * ifp;
+ struct inet6_ifaddr *ifp = NULL;
+ struct hlist_node *node;
u8 hash = ipv6_addr_hash(addr);
read_lock_bh(&addrconf_hash_lock);
- for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr) &&
@@ -1300,10 +1294,11 @@ static
int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
struct net_device *dev)
{
- struct inet6_ifaddr * ifp;
+ struct inet6_ifaddr *ifp;
+ struct hlist_node *node;
u8 hash = ipv6_addr_hash(addr);
- for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr)) {
@@ -1342,11 +1337,12 @@ EXPORT_SYMBOL(ipv6_chk_prefix);
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
struct net_device *dev, int strict)
{
- struct inet6_ifaddr * ifp;
+ struct inet6_ifaddr *ifp = NULL;
+ struct hlist_node *node;
u8 hash = ipv6_addr_hash(addr);
read_lock_bh(&addrconf_hash_lock);
- for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr)) {
@@ -2610,7 +2606,6 @@ static int addrconf_ifdown(struct net_de
struct inet6_dev *idev;
struct inet6_ifaddr *ifa, **bifa;
struct net *net = dev_net(dev);
- int i;
ASSERT_RTNL();
@@ -2635,25 +2630,6 @@ static int addrconf_ifdown(struct net_de
}
- /* Step 2: clear hash table */
- for (i=0; i<IN6_ADDR_HSIZE; i++) {
- bifa = &inet6_addr_lst[i];
-
- write_lock_bh(&addrconf_hash_lock);
- while ((ifa = *bifa) != NULL) {
- if (ifa->idev == idev &&
- (how || !(ifa->flags&IFA_F_PERMANENT) ||
- ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
- *bifa = ifa->lst_next;
- ifa->lst_next = NULL;
- __in6_ifa_put(ifa);
- continue;
- }
- bifa = &ifa->lst_next;
- }
- write_unlock_bh(&addrconf_hash_lock);
- }
-
write_lock_bh(&idev->lock);
/* Step 3: clear flags for stateless addrconf */
@@ -2714,6 +2690,12 @@ static int addrconf_ifdown(struct net_de
}
write_unlock_bh(&idev->lock);
+ /* clear hash table */
+ write_lock_bh(&addrconf_hash_lock);
+ hlist_del_init(&ifa->addr_lst);
+ __in6_ifa_put(ifa);
+ write_unlock_bh(&addrconf_hash_lock);
+
__ipv6_ifa_notify(RTM_DELADDR, ifa);
atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
in6_ifa_put(ifa);
@@ -2953,36 +2935,37 @@ static struct inet6_ifaddr *if6_get_firs
struct net *net = seq_file_net(seq);
for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
- ifa = inet6_addr_lst[state->bucket];
-
- while (ifa && !net_eq(dev_net(ifa->idev->dev), net))
- ifa = ifa->lst_next;
- if (ifa)
- break;
+ struct hlist_node *n;
+ hlist_for_each_entry(ifa, n,
+ &inet6_addr_lst[state->bucket], addr_lst) {
+ if (net_eq(dev_net(ifa->idev->dev), net))
+ return ifa;
+ }
}
- return ifa;
+ return NULL;
}
-static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
+static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
+ struct inet6_ifaddr *ifa)
{
struct if6_iter_state *state = seq->private;
struct net *net = seq_file_net(seq);
+ struct hlist_node *n = &ifa->addr_lst;
- ifa = ifa->lst_next;
-try_again:
- if (ifa) {
- if (!net_eq(dev_net(ifa->idev->dev), net)) {
- ifa = ifa->lst_next;
- goto try_again;
- }
+ hlist_for_each_entry_continue(ifa, n, addr_lst) {
+ if (net_eq(dev_net(ifa->idev->dev), net))
+ return ifa;
}
- if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
- ifa = inet6_addr_lst[state->bucket];
- goto try_again;
+ while (++state->bucket < IN6_ADDR_HSIZE) {
+ hlist_for_each_entry(ifa, n,
+ &inet6_addr_lst[state->bucket], addr_lst) {
+ if (net_eq(dev_net(ifa->idev->dev), net))
+ return ifa;
+ }
}
- return ifa;
+ return NULL;
}
static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
@@ -3084,10 +3067,12 @@ void if6_proc_exit(void)
int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
{
int ret = 0;
- struct inet6_ifaddr * ifp;
+ struct inet6_ifaddr *ifp = NULL;
+ struct hlist_node *n;
u8 hash = ipv6_addr_hash(addr);
+
read_lock_bh(&addrconf_hash_lock);
- for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
+ hlist_for_each_entry(ifp, n, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr) &&
@@ -3108,6 +3093,7 @@ int ipv6_chk_home_addr(struct net *net,
static void addrconf_verify(unsigned long foo)
{
struct inet6_ifaddr *ifp;
+ struct hlist_node *node;
unsigned long now, next;
int i;
@@ -3121,7 +3107,7 @@ static void addrconf_verify(unsigned lon
restart:
read_lock(&addrconf_hash_lock);
- for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
+ hlist_for_each_entry(ifp, node, &inet6_addr_lst[i], addr_lst) {
unsigned long age;
#ifdef CONFIG_IPV6_PRIVACY
unsigned long regen_advance;
@@ -4540,7 +4526,7 @@ EXPORT_SYMBOL(unregister_inet6addr_notif
int __init addrconf_init(void)
{
- int err;
+ int i, err;
if ((err = ipv6_addr_label_init()) < 0) {
printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
@@ -4575,6 +4561,9 @@ int __init addrconf_init(void)
if (err)
goto errlo;
+ for (i = 0; i < IN6_ADDR_HSIZE; i++)
+ INIT_HLIST_HEAD(&inet6_addr_lst[i]);
+
register_netdevice_notifier(&ipv6_dev_notf);
addrconf_verify(0);
@@ -4603,7 +4592,6 @@ errlo:
void addrconf_cleanup(void)
{
- struct inet6_ifaddr *ifa;
struct net_device *dev;
int i;
@@ -4624,18 +4612,8 @@ void addrconf_cleanup(void)
* Check hash table.
*/
write_lock_bh(&addrconf_hash_lock);
- for (i=0; i < IN6_ADDR_HSIZE; i++) {
- for (ifa=inet6_addr_lst[i]; ifa; ) {
- struct inet6_ifaddr *bifa;
-
- bifa = ifa;
- ifa = ifa->lst_next;
- printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
- /* Do not free it; something is wrong.
- Now we can investigate it with debugger.
- */
- }
- }
+ for (i = 0; i < IN6_ADDR_HSIZE; i++)
+ WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
write_unlock_bh(&addrconf_hash_lock);
del_timer(&addr_chk_timer);
--- a/include/net/if_inet6.h 2010-03-02 14:20:10.473202008 -0800
+++ b/include/net/if_inet6.h 2010-03-02 14:24:40.305201840 -0800
@@ -54,7 +54,7 @@ struct inet6_ifaddr {
struct inet6_dev *idev;
struct rt6_info *rt;
- struct inet6_ifaddr *lst_next; /* next addr in addr_lst */
+ struct hlist_node addr_lst;
struct inet6_ifaddr *if_next; /* next addr in inet6_dev */
#ifdef CONFIG_IPV6_PRIVACY
--
next prev parent reply other threads:[~2010-03-02 23:47 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-02 23:32 [PATCH 00/12] IPv6 addrconf changes Stephen Hemminger
2010-03-02 23:32 ` [PATCH 01/12] IPv6: addrconf dad timer unnecessary bh_disable Stephen Hemminger
2010-03-04 8:39 ` David Miller
2010-03-02 23:32 ` [PATCH 02/12] IPv6: addrconf timer race Stephen Hemminger
2010-03-04 8:40 ` David Miller
2010-03-02 23:32 ` [PATCH 03/12] IPv6: addrconf notify when address is unavailable Stephen Hemminger
2010-03-04 8:40 ` David Miller
2010-03-02 23:32 ` [PATCH 04/12] ipv6: convert temporary address list to list macros Stephen Hemminger
2010-03-02 23:32 ` Stephen Hemminger [this message]
2010-03-02 23:32 ` [PATCH 06/12] IPv6: convert addrconf hash list to RCU Stephen Hemminger
2010-03-02 23:32 ` [PATCH 07/12] ipv6: user better hash for addrconf Stephen Hemminger
2010-03-02 23:32 ` [PATCH 08/12] ipv6: convert idev_list to list macros Stephen Hemminger
2010-03-02 23:32 ` [PATCH 09/12] IPv6: addrconf cleanups Stephen Hemminger
2010-03-02 23:32 ` [PATCH 10/12] IPv6: addrconf checkpatch fixes Stephen Hemminger
2010-03-02 23:32 ` [PATCH 11/12] ipv6: addrconf timer changes Stephen Hemminger
2010-03-02 23:32 ` [PATCH 12/12] IPv6: addrconf cleanup addrconf_verify Stephen Hemminger
2010-03-03 9:16 ` [PATCH 00/12] IPv6 addrconf changes David Miller
2010-03-03 18:14 ` Stephen Hemminger
2010-03-03 18:19 ` [PATCH] IPv6: fix race between cleanup and add/delete address Stephen Hemminger
2010-03-04 8:40 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100302234003.191561399@vyatta.com \
--to=shemminger@vyatta$(echo .)com \
--cc=davem@davemloft$(echo .)net \
--cc=netdev@vger$(echo .)kernel.org \
--cc=yoshfuji@linux-ipv6$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox