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Date: Tue, 22 Feb 2011 15:45:12 +0900
From: Simon Horman <horms@...ge.net.au>
To: Changli Gao <xiaosuo@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Patrick McHardy <kaber@...sh.net>,
Wensong Zhang <wensong@...ux-vs.org>,
Julian Anastasov <ja@....bg>, netdev@...r.kernel.org,
lvs-devel@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] ipvs: use hlist instead of list
Thanks, I have queued this change.
On Sat, Feb 19, 2011 at 06:05:08PM +0800, Changli Gao wrote:
> Signed-off-by: Changli Gao <xiaosuo@...il.com>
> ---
> include/net/ip_vs.h | 2 -
> net/netfilter/ipvs/ip_vs_conn.c | 52 ++++++++++++++++++++++------------------
> 2 files changed, 30 insertions(+), 24 deletions(-)
> diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
> index e80ffb7..2078a47 100644
> --- a/include/net/ip_vs.h
> +++ b/include/net/ip_vs.h
> @@ -494,7 +494,7 @@ struct ip_vs_conn_param {
> * IP_VS structure allocated for each dynamically scheduled connection
> */
> struct ip_vs_conn {
> - struct list_head c_list; /* hashed list heads */
> + struct hlist_node c_list; /* hashed list heads */
> #ifdef CONFIG_NET_NS
> struct net *net; /* Name space */
> #endif
> diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
> index 83233fe..9c2a517 100644
> --- a/net/netfilter/ipvs/ip_vs_conn.c
> +++ b/net/netfilter/ipvs/ip_vs_conn.c
> @@ -59,7 +59,7 @@ static int ip_vs_conn_tab_mask __read_mostly;
> /*
> * Connection hash table: for input and output packets lookups of IPVS
> */
> -static struct list_head *ip_vs_conn_tab __read_mostly;
> +static struct hlist_head *ip_vs_conn_tab __read_mostly;
>
> /* SLAB cache for IPVS connections */
> static struct kmem_cache *ip_vs_conn_cachep __read_mostly;
> @@ -201,7 +201,7 @@ static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
> spin_lock(&cp->lock);
>
> if (!(cp->flags & IP_VS_CONN_F_HASHED)) {
> - list_add(&cp->c_list, &ip_vs_conn_tab[hash]);
> + hlist_add_head(&cp->c_list, &ip_vs_conn_tab[hash]);
> cp->flags |= IP_VS_CONN_F_HASHED;
> atomic_inc(&cp->refcnt);
> ret = 1;
> @@ -234,7 +234,7 @@ static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
> spin_lock(&cp->lock);
>
> if (cp->flags & IP_VS_CONN_F_HASHED) {
> - list_del(&cp->c_list);
> + hlist_del(&cp->c_list);
> cp->flags &= ~IP_VS_CONN_F_HASHED;
> atomic_dec(&cp->refcnt);
> ret = 1;
> @@ -259,12 +259,13 @@ __ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
> {
> unsigned hash;
> struct ip_vs_conn *cp;
> + struct hlist_node *n;
>
> hash = ip_vs_conn_hashkey_param(p, false);
>
> ct_read_lock(hash);
>
> - list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
> if (cp->af == p->af &&
> p->cport == cp->cport && p->vport == cp->vport &&
> ip_vs_addr_equal(p->af, p->caddr, &cp->caddr) &&
> @@ -345,12 +346,13 @@ struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p)
> {
> unsigned hash;
> struct ip_vs_conn *cp;
> + struct hlist_node *n;
>
> hash = ip_vs_conn_hashkey_param(p, false);
>
> ct_read_lock(hash);
>
> - list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
> if (!ip_vs_conn_net_eq(cp, p->net))
> continue;
> if (p->pe_data && p->pe->ct_match) {
> @@ -394,6 +396,7 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
> {
> unsigned hash;
> struct ip_vs_conn *cp, *ret=NULL;
> + struct hlist_node *n;
>
> /*
> * Check for "full" addressed entries
> @@ -402,7 +405,7 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
>
> ct_read_lock(hash);
>
> - list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
> if (cp->af == p->af &&
> p->vport == cp->cport && p->cport == cp->dport &&
> ip_vs_addr_equal(p->af, p->vaddr, &cp->caddr) &&
> @@ -818,7 +821,7 @@ ip_vs_conn_new(const struct ip_vs_conn_param *p,
> return NULL;
> }
>
> - INIT_LIST_HEAD(&cp->c_list);
> + INIT_HLIST_NODE(&cp->c_list);
> setup_timer(&cp->timer, ip_vs_conn_expire, (unsigned long)cp);
> ip_vs_conn_net_set(cp, p->net);
> cp->af = p->af;
> @@ -894,8 +897,8 @@ ip_vs_conn_new(const struct ip_vs_conn_param *p,
> */
> #ifdef CONFIG_PROC_FS
> struct ip_vs_iter_state {
> - struct seq_net_private p;
> - struct list_head *l;
> + struct seq_net_private p;
> + struct hlist_head *l;
> };
>
> static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos)
> @@ -903,13 +906,14 @@ static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos)
> int idx;
> struct ip_vs_conn *cp;
> struct ip_vs_iter_state *iter = seq->private;
> + struct hlist_node *n;
>
> for (idx = 0; idx < ip_vs_conn_tab_size; idx++) {
> ct_read_lock_bh(idx);
> - list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[idx], c_list) {
> if (pos-- == 0) {
> iter->l = &ip_vs_conn_tab[idx];
> - return cp;
> + return cp;
> }
> }
> ct_read_unlock_bh(idx);
> @@ -930,7 +934,8 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
> {
> struct ip_vs_conn *cp = v;
> struct ip_vs_iter_state *iter = seq->private;
> - struct list_head *e, *l = iter->l;
> + struct hlist_node *e;
> + struct hlist_head *l = iter->l;
> int idx;
>
> ++*pos;
> @@ -938,15 +943,15 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
> return ip_vs_conn_array(seq, 0);
>
> /* more on same hash chain? */
> - if ((e = cp->c_list.next) != l)
> - return list_entry(e, struct ip_vs_conn, c_list);
> + if ((e = cp->c_list.next))
> + return hlist_entry(e, struct ip_vs_conn, c_list);
>
> idx = l - ip_vs_conn_tab;
> ct_read_unlock_bh(idx);
>
> while (++idx < ip_vs_conn_tab_size) {
> ct_read_lock_bh(idx);
> - list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
> + hlist_for_each_entry(cp, e, &ip_vs_conn_tab[idx], c_list) {
> iter->l = &ip_vs_conn_tab[idx];
> return cp;
> }
> @@ -959,7 +964,7 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos)
> static void ip_vs_conn_seq_stop(struct seq_file *seq, void *v)
> {
> struct ip_vs_iter_state *iter = seq->private;
> - struct list_head *l = iter->l;
> + struct hlist_head *l = iter->l;
>
> if (l)
> ct_read_unlock_bh(l - ip_vs_conn_tab);
> @@ -1148,13 +1153,14 @@ void ip_vs_random_dropentry(struct net *net)
> */
> for (idx = 0; idx < (ip_vs_conn_tab_size>>5); idx++) {
> unsigned hash = net_random() & ip_vs_conn_tab_mask;
> + struct hlist_node *n;
>
> /*
> * Lock is actually needed in this loop.
> */
> ct_write_lock_bh(hash);
>
> - list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[hash], c_list) {
> if (cp->flags & IP_VS_CONN_F_TEMPLATE)
> /* connection template */
> continue;
> @@ -1202,12 +1208,14 @@ static void ip_vs_conn_flush(struct net *net)
>
> flush_again:
> for (idx = 0; idx < ip_vs_conn_tab_size; idx++) {
> + struct hlist_node *n;
> +
> /*
> * Lock is actually needed in this loop.
> */
> ct_write_lock_bh(idx);
>
> - list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) {
> + hlist_for_each_entry(cp, n, &ip_vs_conn_tab[idx], c_list) {
> if (!ip_vs_conn_net_eq(cp, net))
> continue;
> IP_VS_DBG(4, "del connection\n");
> @@ -1265,8 +1273,7 @@ int __init ip_vs_conn_init(void)
> /*
> * Allocate the connection hash table and initialize its list heads
> */
> - ip_vs_conn_tab = vmalloc(ip_vs_conn_tab_size *
> - sizeof(struct list_head));
> + ip_vs_conn_tab = vmalloc(ip_vs_conn_tab_size * sizeof(*ip_vs_conn_tab));
> if (!ip_vs_conn_tab)
> return -ENOMEM;
>
> @@ -1286,9 +1293,8 @@ int __init ip_vs_conn_init(void)
> IP_VS_DBG(0, "Each connection entry needs %Zd bytes at least\n",
> sizeof(struct ip_vs_conn));
>
> - for (idx = 0; idx < ip_vs_conn_tab_size; idx++) {
> - INIT_LIST_HEAD(&ip_vs_conn_tab[idx]);
> - }
> + for (idx = 0; idx < ip_vs_conn_tab_size; idx++)
> + INIT_HLIST_HEAD(&ip_vs_conn_tab[idx]);
>
> for (idx = 0; idx < CT_LOCKARRAY_SIZE; idx++) {
> rwlock_init(&__ip_vs_conntbl_lock_array[idx].l);
> --
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