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Date: Sat, 05 Mar 2011 15:33:30 +0100
From: Nicolas de Pesloüan
<nicolas.2p.debian@...il.com>
To: Jiri Pirko <jpirko@...hat.com>
CC: netdev@...r.kernel.org, davem@...emloft.net,
shemminger@...ux-foundation.org, kaber@...sh.net, fubar@...ibm.com,
eric.dumazet@...il.com, andy@...yhouse.net
Subject: Re: [patch net-next-2.6 6/8] bonding: move processing of recv handlers
into handle_frame()
Le 05/03/2011 11:29, Jiri Pirko a écrit :
> Since now when bonding uses rx_handler, all traffic going into bond
> device goes thru bond_handle_frame. So there's no need to go back into
> bonding code later via ptype handlers. This patch converts
> original ptype handlers into "bonding receive probes". These functions
> are called from bond_handle_frame and they are registered per-mode.
Does this still support having the arp_ip_target on a vlan?
(eth0 -> bond0 -> bond0.100, with arp_ip_target only reachable through bond0.100).
>
> Signed-off-by: Jiri Pirko<jpirko@...hat.com>
> ---
> drivers/net/bonding/bond_3ad.c | 29 ++--------
> drivers/net/bonding/bond_3ad.h | 4 +-
> drivers/net/bonding/bond_alb.c | 46 ++++-----------
> drivers/net/bonding/bond_alb.h | 1 -
> drivers/net/bonding/bond_main.c | 121 +++++++------------------------------
> drivers/net/bonding/bond_sysfs.c | 6 --
> drivers/net/bonding/bonding.h | 4 +-
> 7 files changed, 43 insertions(+), 168 deletions(-)
>
> diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
> index 047af0b..194aaf7 100644
> --- a/drivers/net/bonding/bond_3ad.c
> +++ b/drivers/net/bonding/bond_3ad.c
> @@ -2461,35 +2461,16 @@ out:
> return NETDEV_TX_OK;
> }
>
> -int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
> +void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
> + struct slave *slave)
> {
> - struct bonding *bond = netdev_priv(dev);
> - struct slave *slave = NULL;
> - int ret = NET_RX_DROP;
> -
> - if (!(dev->flags& IFF_MASTER))
> - goto out;
> -
> - skb = skb_share_check(skb, GFP_ATOMIC);
> - if (!skb)
> - goto out;
> + if (skb->protocol != PKT_TYPE_LACPDU)
> + return;
>
> if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
> - goto out;
> + return;
>
> read_lock(&bond->lock);
> - slave = bond_get_slave_by_dev(netdev_priv(dev), orig_dev);
> - if (!slave)
> - goto out_unlock;
> -
> bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
> -
> - ret = NET_RX_SUCCESS;
> -
> -out_unlock:
> read_unlock(&bond->lock);
> -out:
> - dev_kfree_skb(skb);
> -
> - return ret;
> }
> diff --git a/drivers/net/bonding/bond_3ad.h b/drivers/net/bonding/bond_3ad.h
> index 2c46a154..56a88ff 100644
> --- a/drivers/net/bonding/bond_3ad.h
> +++ b/drivers/net/bonding/bond_3ad.h
> @@ -258,7 +258,6 @@ struct ad_bond_info {
> * requested
> */
> struct timer_list ad_timer;
> - struct packet_type ad_pkt_type;
> };
>
> struct ad_slave_info {
> @@ -279,7 +278,8 @@ void bond_3ad_adapter_duplex_changed(struct slave *slave);
> void bond_3ad_handle_link_change(struct slave *slave, char link);
> int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
> int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev);
> -int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev);
> +void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
> + struct slave *slave);
> int bond_3ad_set_carrier(struct bonding *bond);
> #endif //__BOND_3AD_H__
>
> diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
> index 9bc5de3..96d28f9 100644
> --- a/drivers/net/bonding/bond_alb.c
> +++ b/drivers/net/bonding/bond_alb.c
> @@ -308,49 +308,33 @@ static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
> _unlock_rx_hashtbl(bond);
> }
>
> -static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct packet_type *ptype, struct net_device *orig_dev)
> +static void rlb_arp_recv(struct sk_buff *skb, struct bonding *bond,
> + struct slave *slave)
> {
> - struct bonding *bond;
> - struct arp_pkt *arp = (struct arp_pkt *)skb->data;
> - int res = NET_RX_DROP;
> + struct arp_pkt *arp;
>
> - while (bond_dev->priv_flags& IFF_802_1Q_VLAN)
> - bond_dev = vlan_dev_real_dev(bond_dev);
> -
> - if (!(bond_dev->priv_flags& IFF_BONDING) ||
> - !(bond_dev->flags& IFF_MASTER))
> - goto out;
> + if (skb->protocol != cpu_to_be16(ETH_P_ARP))
> + return;
>
> + arp = (struct arp_pkt *) skb->data;
> if (!arp) {
> pr_debug("Packet has no ARP data\n");
> - goto out;
> + return;
> }
>
> - skb = skb_share_check(skb, GFP_ATOMIC);
> - if (!skb)
> - goto out;
> -
> - if (!pskb_may_pull(skb, arp_hdr_len(bond_dev)))
> - goto out;
> + if (!pskb_may_pull(skb, arp_hdr_len(bond->dev)))
> + return;
>
> if (skb->len< sizeof(struct arp_pkt)) {
> pr_debug("Packet is too small to be an ARP\n");
> - goto out;
> + return;
> }
>
> if (arp->op_code == htons(ARPOP_REPLY)) {
> /* update rx hash table for this ARP */
> - bond = netdev_priv(bond_dev);
> rlb_update_entry_from_arp(bond, arp);
> pr_debug("Server received an ARP Reply from client\n");
> }
> -
> - res = NET_RX_SUCCESS;
> -
> -out:
> - dev_kfree_skb(skb);
> -
> - return res;
> }
>
> /* Caller must hold bond lock for read */
> @@ -759,7 +743,6 @@ static void rlb_init_table_entry(struct rlb_client_info *entry)
> static int rlb_initialize(struct bonding *bond)
> {
> struct alb_bond_info *bond_info =&(BOND_ALB_INFO(bond));
> - struct packet_type *pk_type =&(BOND_ALB_INFO(bond).rlb_pkt_type);
> struct rlb_client_info *new_hashtbl;
> int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
> int i;
> @@ -784,13 +767,8 @@ static int rlb_initialize(struct bonding *bond)
>
> _unlock_rx_hashtbl(bond);
>
> - /*initialize packet type*/
> - pk_type->type = cpu_to_be16(ETH_P_ARP);
> - pk_type->dev = bond->dev;
> - pk_type->func = rlb_arp_recv;
> -
> /* register to receive ARPs */
> - dev_add_pack(pk_type);
> + bond->recv_probe = rlb_arp_recv;
>
> return 0;
> }
> @@ -799,8 +777,6 @@ static void rlb_deinitialize(struct bonding *bond)
> {
> struct alb_bond_info *bond_info =&(BOND_ALB_INFO(bond));
>
> - dev_remove_pack(&(bond_info->rlb_pkt_type));
> -
> _lock_rx_hashtbl(bond);
>
> kfree(bond_info->rx_hashtbl);
> diff --git a/drivers/net/bonding/bond_alb.h b/drivers/net/bonding/bond_alb.h
> index 118c28a..6605e9e 100644
> --- a/drivers/net/bonding/bond_alb.h
> +++ b/drivers/net/bonding/bond_alb.h
> @@ -130,7 +130,6 @@ struct alb_bond_info {
> int lp_counter;
> /* -------- rlb parameters -------- */
> int rlb_enabled;
> - struct packet_type rlb_pkt_type;
> struct rlb_client_info *rx_hashtbl; /* Receive hash table */
> spinlock_t rx_hashtbl_lock;
> u32 rx_hashtbl_head;
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index dbe182c..8ba7faa 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -1467,27 +1467,17 @@ static void bond_setup_by_slave(struct net_device *bond_dev,
> }
>
> /* On bonding slaves other than the currently active slave, suppress
> - * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
> - * ARP on active-backup slaves with arp_validate enabled.
> + * duplicates except for alb non-mcast/bcast.
> */
> static bool bond_should_deliver_exact_match(struct sk_buff *skb,
> struct slave *slave,
> struct bonding *bond)
> {
> if (bond_is_slave_inactive(slave)) {
> - if (slave_do_arp_validate(bond, slave)&&
> - skb->protocol == __cpu_to_be16(ETH_P_ARP))
> - return false;
> -
> if (bond->params.mode == BOND_MODE_ALB&&
> skb->pkt_type != PACKET_BROADCAST&&
> skb->pkt_type != PACKET_MULTICAST)
> - return false;
> -
> - if (bond->params.mode == BOND_MODE_8023AD&&
> - skb->protocol == __cpu_to_be16(ETH_P_SLOW))
> return false;
> -
> return true;
> }
> return false;
> @@ -1513,6 +1503,15 @@ static struct sk_buff *bond_handle_frame(struct sk_buff *skb)
> if (bond->params.arp_interval)
> slave->dev->last_rx = jiffies;
>
> + if (bond->recv_probe) {
> + struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
> +
> + if (likely(nskb)) {
> + bond->recv_probe(nskb, bond, slave);
> + dev_kfree_skb(nskb);
> + }
> + }
> +
> if (bond_should_deliver_exact_match(skb, slave, bond)) {
> skb->deliver_no_wcard = 1;
> return skb;
> @@ -2813,48 +2812,26 @@ static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32
> }
> }
>
> -static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
> +static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond,
> + struct slave *slave)
> {
> struct arphdr *arp;
> - struct slave *slave;
> - struct bonding *bond;
> unsigned char *arp_ptr;
> __be32 sip, tip;
>
> - if (dev->priv_flags& IFF_802_1Q_VLAN) {
> - /*
> - * When using VLANS and bonding, dev and oriv_dev may be
> - * incorrect if the physical interface supports VLAN
> - * acceleration. With this change ARP validation now
> - * works for hosts only reachable on the VLAN interface.
> - */
> - dev = vlan_dev_real_dev(dev);
> - orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif);
> - }
> -
> - if (!(dev->priv_flags& IFF_BONDING) || !(dev->flags& IFF_MASTER))
> - goto out;
> + if (skb->protocol != __cpu_to_be16(ETH_P_ARP))
> + return;
What happens if the skb that hold the ARP request/reply is vlan tagged? The ARP ptype_base handler
for bonding used to be called after vlan processing.
> - bond = netdev_priv(dev);
> read_lock(&bond->lock);
>
> - pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
> - bond->dev->name, skb->dev ? skb->dev->name : "NULL",
> - orig_dev ? orig_dev->name : "NULL");
> + pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
> + bond->dev->name, skb->dev->name);
>
> - slave = bond_get_slave_by_dev(bond, orig_dev);
> - if (!slave || !slave_do_arp_validate(bond, slave))
> - goto out_unlock;
> -
> - skb = skb_share_check(skb, GFP_ATOMIC);
> - if (!skb)
> - goto out_unlock;
> -
> - if (!pskb_may_pull(skb, arp_hdr_len(dev)))
> + if (!pskb_may_pull(skb, arp_hdr_len(bond->dev)))
> goto out_unlock;
>
> arp = arp_hdr(skb);
> - if (arp->ar_hln != dev->addr_len ||
> + if (arp->ar_hln != bond->dev->addr_len ||
> skb->pkt_type == PACKET_OTHERHOST ||
> skb->pkt_type == PACKET_LOOPBACK ||
> arp->ar_hrd != htons(ARPHRD_ETHER) ||
> @@ -2863,9 +2840,9 @@ static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct pack
> goto out_unlock;
>
> arp_ptr = (unsigned char *)(arp + 1);
> - arp_ptr += dev->addr_len;
> + arp_ptr += bond->dev->addr_len;
> memcpy(&sip, arp_ptr, 4);
> - arp_ptr += 4 + dev->addr_len;
> + arp_ptr += 4 + bond->dev->addr_len;
> memcpy(&tip, arp_ptr, 4);
>
> pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
> @@ -2888,9 +2865,6 @@ static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct pack
>
> out_unlock:
> read_unlock(&bond->lock);
> -out:
> - dev_kfree_skb(skb);
> - return NET_RX_SUCCESS;
> }
>
> /*
> @@ -3782,48 +3756,6 @@ static struct notifier_block bond_inetaddr_notifier = {
> .notifier_call = bond_inetaddr_event,
> };
>
> -/*-------------------------- Packet type handling ---------------------------*/
> -
> -/* register to receive lacpdus on a bond */
> -static void bond_register_lacpdu(struct bonding *bond)
> -{
> - struct packet_type *pk_type =&(BOND_AD_INFO(bond).ad_pkt_type);
> -
> - /* initialize packet type */
> - pk_type->type = PKT_TYPE_LACPDU;
> - pk_type->dev = bond->dev;
> - pk_type->func = bond_3ad_lacpdu_recv;
> -
> - dev_add_pack(pk_type);
> -}
> -
> -/* unregister to receive lacpdus on a bond */
> -static void bond_unregister_lacpdu(struct bonding *bond)
> -{
> - dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
> -}
> -
> -void bond_register_arp(struct bonding *bond)
> -{
> - struct packet_type *pt =&bond->arp_mon_pt;
> -
> - if (pt->type)
> - return;
> -
> - pt->type = htons(ETH_P_ARP);
> - pt->dev = bond->dev;
> - pt->func = bond_arp_rcv;
> - dev_add_pack(pt);
> -}
> -
> -void bond_unregister_arp(struct bonding *bond)
> -{
> - struct packet_type *pt =&bond->arp_mon_pt;
> -
> - dev_remove_pack(pt);
> - pt->type = 0;
> -}
> -
> /*---------------------------- Hashing Policies -----------------------------*/
>
> /*
> @@ -3917,14 +3849,14 @@ static int bond_open(struct net_device *bond_dev)
>
> queue_delayed_work(bond->wq,&bond->arp_work, 0);
> if (bond->params.arp_validate)
> - bond_register_arp(bond);
> + bond->recv_probe = bond_arp_rcv;
> }
>
> if (bond->params.mode == BOND_MODE_8023AD) {
> INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
> queue_delayed_work(bond->wq,&bond->ad_work, 0);
> /* register to receive LACPDUs */
> - bond_register_lacpdu(bond);
> + bond->recv_probe = bond_3ad_lacpdu_recv;
> bond_3ad_initiate_agg_selection(bond, 1);
> }
>
> @@ -3935,14 +3867,6 @@ static int bond_close(struct net_device *bond_dev)
> {
> struct bonding *bond = netdev_priv(bond_dev);
>
> - if (bond->params.mode == BOND_MODE_8023AD) {
> - /* Unregister the receive of LACPDUs */
> - bond_unregister_lacpdu(bond);
> - }
> -
> - if (bond->params.arp_validate)
> - bond_unregister_arp(bond);
> -
> write_lock_bh(&bond->lock);
>
> bond->send_grat_arp = 0;
> @@ -3982,6 +3906,7 @@ static int bond_close(struct net_device *bond_dev)
> */
> bond_alb_deinitialize(bond);
> }
> + bond->recv_probe = NULL;
>
> return 0;
> }
> diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
> index 5161183..6804efe 100644
> --- a/drivers/net/bonding/bond_sysfs.c
> +++ b/drivers/net/bonding/bond_sysfs.c
> @@ -419,11 +419,6 @@ static ssize_t bonding_store_arp_validate(struct device *d,
> bond->dev->name, arp_validate_tbl[new_value].modename,
> new_value);
>
> - if (!bond->params.arp_validate&& new_value)
> - bond_register_arp(bond);
> - else if (bond->params.arp_validate&& !new_value)
> - bond_unregister_arp(bond);
> -
> bond->params.arp_validate = new_value;
>
> return count;
> @@ -998,7 +993,6 @@ static ssize_t bonding_store_miimon(struct device *d,
> bond->dev->name);
> bond->params.arp_interval = 0;
> if (bond->params.arp_validate) {
> - bond_unregister_arp(bond);
> bond->params.arp_validate =
> BOND_ARP_VALIDATE_NONE;
> }
> diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
> index 8f78166..75a1308 100644
> --- a/drivers/net/bonding/bonding.h
> +++ b/drivers/net/bonding/bonding.h
> @@ -228,6 +228,8 @@ struct bonding {
> struct slave *primary_slave;
> bool force_primary;
> s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
> + void (*recv_probe)(struct sk_buff *, struct bonding *,
> + struct slave *);
> rwlock_t lock;
> rwlock_t curr_slave_lock;
> s8 kill_timers;
> @@ -406,8 +408,6 @@ void bond_set_mode_ops(struct bonding *bond, int mode);
> int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
> void bond_select_active_slave(struct bonding *bond);
> void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
> -void bond_register_arp(struct bonding *);
> -void bond_unregister_arp(struct bonding *);
> void bond_create_debugfs(void);
> void bond_destroy_debugfs(void);
> void bond_debug_register(struct bonding *bond);
--
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