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Date: Sun, 6 Feb 2022 00:25:42 +0900
From: Juhee Kang <claudiajkang@...il.com>
To: davem@...emloft.net, Jakub Kicinski <kuba@...nel.org>,
Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net-next] net: hsr: use hlist_head instead of list_head
for mac addresses
On Sat, Feb 5, 2022 at 11:17 PM Juhee Kang <claudiajkang@...il.com> wrote:
>
> Currently, HSR manages mac addresses of known HSR nodes by using list_head.
> It takes a lot of time when there are a lot of registered nodes due to
> finding specific mac address nodes by using linear search. We can be
> reducing the time by using hlist. Thus, this patch moves list_head to
> hlist_head for mac addresses and this allows for further improvement of
> network performance.
>
> Condition: registered 10,000 known HSR nodes
> Before:
> # iperf3 -c 192.168.10.1 -i 1 -t 10
> Connecting to host 192.168.10.1, port 5201
> [ 5] local 192.168.10.2 port 59442 connected to 192.168.10.1 port 5201
> [ ID] Interval Transfer Bitrate Retr Cwnd
> [ 5] 0.00-1.49 sec 3.75 MBytes 21.1 Mbits/sec 0 158 KBytes
> [ 5] 1.49-2.05 sec 1.25 MBytes 18.7 Mbits/sec 0 166 KBytes
> [ 5] 2.05-3.06 sec 2.44 MBytes 20.3 Mbits/sec 56 16.9 KBytes
> [ 5] 3.06-4.08 sec 1.43 MBytes 11.7 Mbits/sec 11 38.0 KBytes
> [ 5] 4.08-5.00 sec 951 KBytes 8.49 Mbits/sec 0 56.3 KBytes
>
> After:
> # iperf3 -c 192.168.10.1 -i 1 -t 10
> Connecting to host 192.168.10.1, port 5201
> [ 5] local 192.168.10.2 port 36460 connected to 192.168.10.1 port 5201
> [ ID] Interval Transfer Bitrate Retr Cwnd
> [ 5] 0.00-1.00 sec 7.39 MBytes 62.0 Mbits/sec 3 130 KBytes
> [ 5] 1.00-2.00 sec 5.06 MBytes 42.4 Mbits/sec 16 113 KBytes
> [ 5] 2.00-3.00 sec 8.58 MBytes 72.0 Mbits/sec 42 94.3 KBytes
> [ 5] 3.00-4.00 sec 7.44 MBytes 62.4 Mbits/sec 2 131 KBytes
> [ 5] 4.00-5.07 sec 8.13 MBytes 63.5 Mbits/sec 38 92.9 KBytes
>
> Signed-off-by: Juhee Kang <claudiajkang@...il.com>
> ---
> v3:
> - rebase current net-next tree
>
> v2:
> - fix rcu warning
>
> net/hsr/hsr_debugfs.c | 39 +++++----
> net/hsr/hsr_device.c | 10 ++-
> net/hsr/hsr_forward.c | 7 +-
> net/hsr/hsr_framereg.c | 195 ++++++++++++++++++++++++-----------------
> net/hsr/hsr_framereg.h | 8 +-
> net/hsr/hsr_main.h | 9 +-
> net/hsr/hsr_netlink.c | 4 +-
> 7 files changed, 167 insertions(+), 105 deletions(-)
>
> diff --git a/net/hsr/hsr_debugfs.c b/net/hsr/hsr_debugfs.c
> index 99f3af1a9d4d..4d50e9b3055d 100644
> --- a/net/hsr/hsr_debugfs.c
> +++ b/net/hsr/hsr_debugfs.c
> @@ -17,6 +17,7 @@
> #include <linux/module.h>
> #include <linux/errno.h>
> #include <linux/debugfs.h>
> +#include <linux/jhash.h>
> #include "hsr_main.h"
> #include "hsr_framereg.h"
>
> @@ -28,6 +29,7 @@ hsr_node_table_show(struct seq_file *sfp, void *data)
> {
> struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
> struct hsr_node *node;
> + int i;
>
> seq_printf(sfp, "Node Table entries for (%s) device\n",
> (priv->prot_version == PRP_V1 ? "PRP" : "HSR"));
> @@ -39,22 +41,27 @@ hsr_node_table_show(struct seq_file *sfp, void *data)
> seq_puts(sfp, "DAN-H\n");
>
> rcu_read_lock();
> - list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
> - /* skip self node */
> - if (hsr_addr_is_self(priv, node->macaddress_A))
> - continue;
> - seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
> - seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
> - seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_A]);
> - seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_B]);
> - seq_printf(sfp, "%14x, ", node->addr_B_port);
> -
> - if (priv->prot_version == PRP_V1)
> - seq_printf(sfp, "%5x, %5x, %5x\n",
> - node->san_a, node->san_b,
> - (node->san_a == 0 && node->san_b == 0));
> - else
> - seq_printf(sfp, "%5x\n", 1);
> +
> + for (i = 0 ; i < priv->hash_buckets; i++) {
> + hlist_for_each_entry_rcu(node, &priv->node_db[i], mac_list) {
> + /* skip self node */
> + if (hsr_addr_is_self(priv, node->macaddress_A))
> + continue;
> + seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
> + seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
> + seq_printf(sfp, "%10lx, ",
> + node->time_in[HSR_PT_SLAVE_A]);
> + seq_printf(sfp, "%10lx, ",
> + node->time_in[HSR_PT_SLAVE_B]);
> + seq_printf(sfp, "%14x, ", node->addr_B_port);
> +
> + if (priv->prot_version == PRP_V1)
> + seq_printf(sfp, "%5x, %5x, %5x\n",
> + node->san_a, node->san_b,
> + (node->san_a == 0 && node->san_b == 0));
> + else
> + seq_printf(sfp, "%5x\n", 1);
> + }
> }
> rcu_read_unlock();
> return 0;
> diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
> index e57fdad9ef94..7f250216433d 100644
> --- a/net/hsr/hsr_device.c
> +++ b/net/hsr/hsr_device.c
> @@ -485,12 +485,16 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
> {
> bool unregister = false;
> struct hsr_priv *hsr;
> - int res;
> + int res, i;
>
> hsr = netdev_priv(hsr_dev);
> INIT_LIST_HEAD(&hsr->ports);
> - INIT_LIST_HEAD(&hsr->node_db);
> - INIT_LIST_HEAD(&hsr->self_node_db);
> + INIT_HLIST_HEAD(&hsr->self_node_db);
> + hsr->hash_buckets = HSR_HSIZE;
> + get_random_bytes(&hsr->hash_seed, sizeof(hsr->hash_seed));
> + for (i = 0; i < hsr->hash_buckets; i++)
> + INIT_HLIST_HEAD(&hsr->node_db[i]);
> +
> spin_lock_init(&hsr->list_lock);
>
> eth_hw_addr_set(hsr_dev, slave[0]->dev_addr);
> diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
> index e59cbb4f0cd1..5bf357734b11 100644
> --- a/net/hsr/hsr_forward.c
> +++ b/net/hsr/hsr_forward.c
> @@ -570,20 +570,23 @@ static int fill_frame_info(struct hsr_frame_info *frame,
> struct ethhdr *ethhdr;
> __be16 proto;
> int ret;
> + u32 hash;
>
> /* Check if skb contains ethhdr */
> if (skb->mac_len < sizeof(struct ethhdr))
> return -EINVAL;
>
> memset(frame, 0, sizeof(*frame));
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> + hash = hsr_mac_hash(port->hsr, ethhdr->h_source);
> frame->is_supervision = is_supervision_frame(port->hsr, skb);
> - frame->node_src = hsr_get_node(port, &hsr->node_db, skb,
> + frame->node_src = hsr_get_node(port, &hsr->node_db[hash], skb,
> frame->is_supervision,
> port->type);
> if (!frame->node_src)
> return -1; /* Unknown node and !is_supervision, or no mem */
>
> - ethhdr = (struct ethhdr *)skb_mac_header(skb);
> frame->is_vlan = false;
> proto = ethhdr->h_proto;
>
> diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
> index 0775f0f95dbf..e96e39362468 100644
> --- a/net/hsr/hsr_framereg.c
> +++ b/net/hsr/hsr_framereg.c
> @@ -15,11 +15,28 @@
> #include <linux/etherdevice.h>
> #include <linux/slab.h>
> #include <linux/rculist.h>
> +#include <linux/jhash.h>
> #include "hsr_main.h"
> #include "hsr_framereg.h"
> #include "hsr_netlink.h"
>
> -/* TODO: use hash lists for mac addresses (linux/jhash.h)? */
> +u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr)
> +{
> + u32 hash = jhash(addr, ETH_ALEN, hsr->hash_seed);
> +
> + return reciprocal_scale(hash, hsr->hash_buckets);
> +}
> +
> +struct hsr_node *hsr_node_get_first(struct hlist_head *head)
> +{
> + struct hlist_node *first;
> +
> + first = rcu_dereference(hlist_first_rcu(head));
> + if (first)
> + return hlist_entry(first, struct hsr_node, mac_list);
> +
> + return NULL;
> +}
>
> /* seq_nr_after(a, b) - return true if a is after (higher in sequence than) b,
> * false otherwise.
> @@ -42,8 +59,7 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
> {
> struct hsr_node *node;
>
> - node = list_first_or_null_rcu(&hsr->self_node_db, struct hsr_node,
> - mac_list);
> + node = hsr_node_get_first(&hsr->self_node_db);
> if (!node) {
> WARN_ONCE(1, "HSR: No self node\n");
> return false;
> @@ -59,12 +75,12 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
>
> /* Search for mac entry. Caller must hold rcu read lock.
> */
> -static struct hsr_node *find_node_by_addr_A(struct list_head *node_db,
> +static struct hsr_node *find_node_by_addr_A(struct hlist_head *node_db,
> const unsigned char addr[ETH_ALEN])
> {
> struct hsr_node *node;
>
> - list_for_each_entry_rcu(node, node_db, mac_list) {
> + hlist_for_each_entry_rcu(node, node_db, mac_list) {
> if (ether_addr_equal(node->macaddress_A, addr))
> return node;
> }
> @@ -79,7 +95,7 @@ int hsr_create_self_node(struct hsr_priv *hsr,
> const unsigned char addr_a[ETH_ALEN],
> const unsigned char addr_b[ETH_ALEN])
> {
> - struct list_head *self_node_db = &hsr->self_node_db;
> + struct hlist_head *self_node_db = &hsr->self_node_db;
> struct hsr_node *node, *oldnode;
>
> node = kmalloc(sizeof(*node), GFP_KERNEL);
> @@ -90,14 +106,13 @@ int hsr_create_self_node(struct hsr_priv *hsr,
> ether_addr_copy(node->macaddress_B, addr_b);
>
> spin_lock_bh(&hsr->list_lock);
> - oldnode = list_first_or_null_rcu(self_node_db,
> - struct hsr_node, mac_list);
> + oldnode = hsr_node_get_first(self_node_db);
> if (oldnode) {
> - list_replace_rcu(&oldnode->mac_list, &node->mac_list);
> + hlist_replace_rcu(&oldnode->mac_list, &node->mac_list);
> spin_unlock_bh(&hsr->list_lock);
> kfree_rcu(oldnode, rcu_head);
> } else {
> - list_add_tail_rcu(&node->mac_list, self_node_db);
> + hlist_add_tail_rcu(&node->mac_list, self_node_db);
> spin_unlock_bh(&hsr->list_lock);
> }
>
> @@ -106,25 +121,25 @@ int hsr_create_self_node(struct hsr_priv *hsr,
>
> void hsr_del_self_node(struct hsr_priv *hsr)
> {
> - struct list_head *self_node_db = &hsr->self_node_db;
> + struct hlist_head *self_node_db = &hsr->self_node_db;
> struct hsr_node *node;
>
> spin_lock_bh(&hsr->list_lock);
> - node = list_first_or_null_rcu(self_node_db, struct hsr_node, mac_list);
> + node = hsr_node_get_first(self_node_db);
> if (node) {
> - list_del_rcu(&node->mac_list);
> + hlist_del_rcu(&node->mac_list);
> kfree_rcu(node, rcu_head);
> }
> spin_unlock_bh(&hsr->list_lock);
> }
>
> -void hsr_del_nodes(struct list_head *node_db)
> +void hsr_del_nodes(struct hlist_head *node_db)
> {
> struct hsr_node *node;
> - struct hsr_node *tmp;
> + struct hlist_node *tmp;
>
> - list_for_each_entry_safe(node, tmp, node_db, mac_list)
> - kfree(node);
> + hlist_for_each_entry_safe(node, tmp, node_db, mac_list)
> + kfree_rcu(node, rcu_head);
> }
>
> void prp_handle_san_frame(bool san, enum hsr_port_type port,
> @@ -145,7 +160,7 @@ void prp_handle_san_frame(bool san, enum hsr_port_type port,
> * originating from the newly added node.
> */
> static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
> - struct list_head *node_db,
> + struct hlist_head *node_db,
> unsigned char addr[],
> u16 seq_out, bool san,
> enum hsr_port_type rx_port)
> @@ -175,14 +190,14 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
> hsr->proto_ops->handle_san_frame(san, rx_port, new_node);
>
> spin_lock_bh(&hsr->list_lock);
> - list_for_each_entry_rcu(node, node_db, mac_list,
> + hlist_for_each_entry_rcu(node, node_db, mac_list,
> lockdep_is_held(&hsr->list_lock)) {
> if (ether_addr_equal(node->macaddress_A, addr))
> goto out;
> if (ether_addr_equal(node->macaddress_B, addr))
> goto out;
> }
> - list_add_tail_rcu(&new_node->mac_list, node_db);
> + hlist_add_tail_rcu(&new_node->mac_list, node_db);
> spin_unlock_bh(&hsr->list_lock);
> return new_node;
> out:
> @@ -202,7 +217,7 @@ void prp_update_san_info(struct hsr_node *node, bool is_sup)
>
> /* Get the hsr_node from which 'skb' was sent.
> */
> -struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
> +struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
> struct sk_buff *skb, bool is_sup,
> enum hsr_port_type rx_port)
> {
> @@ -218,7 +233,7 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
>
> ethhdr = (struct ethhdr *)skb_mac_header(skb);
>
> - list_for_each_entry_rcu(node, node_db, mac_list) {
> + hlist_for_each_entry_rcu(node, node_db, mac_list) {
> if (ether_addr_equal(node->macaddress_A, ethhdr->h_source)) {
> if (hsr->proto_ops->update_san_info)
> hsr->proto_ops->update_san_info(node, is_sup);
> @@ -268,11 +283,12 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
> struct hsr_sup_tlv *hsr_sup_tlv;
> struct hsr_node *node_real;
> struct sk_buff *skb = NULL;
> - struct list_head *node_db;
> + struct hlist_head *node_db;
> struct ethhdr *ethhdr;
> int i;
> unsigned int pull_size = 0;
> unsigned int total_pull_size = 0;
> + u32 hash;
>
> /* Here either frame->skb_hsr or frame->skb_prp should be
> * valid as supervision frame always will have protocol
> @@ -310,11 +326,13 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
> hsr_sp = (struct hsr_sup_payload *)skb->data;
>
> /* Merge node_curr (registered on macaddress_B) into node_real */
> - node_db = &port_rcv->hsr->node_db;
> - node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A);
> + node_db = port_rcv->hsr->node_db;
> + hash = hsr_mac_hash(hsr, hsr_sp->macaddress_A);
> + node_real = find_node_by_addr_A(&node_db[hash], hsr_sp->macaddress_A);
> if (!node_real)
> /* No frame received from AddrA of this node yet */
> - node_real = hsr_add_node(hsr, node_db, hsr_sp->macaddress_A,
> + node_real = hsr_add_node(hsr, &node_db[hash],
> + hsr_sp->macaddress_A,
> HSR_SEQNR_START - 1, true,
> port_rcv->type);
> if (!node_real)
> @@ -348,7 +366,8 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
> hsr_sp = (struct hsr_sup_payload *)skb->data;
>
> /* Check if redbox mac and node mac are equal. */
> - if (!ether_addr_equal(node_real->macaddress_A, hsr_sp->macaddress_A)) {
> + if (!ether_addr_equal(node_real->macaddress_A,
> + hsr_sp->macaddress_A)) {
> /* This is a redbox supervision frame for a VDAN! */
> goto done;
> }
> @@ -368,7 +387,7 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
> node_real->addr_B_port = port_rcv->type;
>
> spin_lock_bh(&hsr->list_lock);
> - list_del_rcu(&node_curr->mac_list);
> + hlist_del_rcu(&node_curr->mac_list);
> spin_unlock_bh(&hsr->list_lock);
> kfree_rcu(node_curr, rcu_head);
>
> @@ -406,6 +425,7 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
> struct hsr_port *port)
> {
> struct hsr_node *node_dst;
> + u32 hash;
>
> if (!skb_mac_header_was_set(skb)) {
> WARN_ONCE(1, "%s: Mac header not set\n", __func__);
> @@ -415,7 +435,8 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
> if (!is_unicast_ether_addr(eth_hdr(skb)->h_dest))
> return;
>
> - node_dst = find_node_by_addr_A(&port->hsr->node_db,
> + hash = hsr_mac_hash(port->hsr, eth_hdr(skb)->h_dest);
> + node_dst = find_node_by_addr_A(&port->hsr->node_db[hash],
> eth_hdr(skb)->h_dest);
> if (!node_dst) {
> if (net_ratelimit())
> @@ -491,59 +512,72 @@ static struct hsr_port *get_late_port(struct hsr_priv *hsr,
> void hsr_prune_nodes(struct timer_list *t)
> {
> struct hsr_priv *hsr = from_timer(hsr, t, prune_timer);
> + struct hlist_node *tmp;
> struct hsr_node *node;
> - struct hsr_node *tmp;
> struct hsr_port *port;
> unsigned long timestamp;
> unsigned long time_a, time_b;
> + int i;
>
> spin_lock_bh(&hsr->list_lock);
> - list_for_each_entry_safe(node, tmp, &hsr->node_db, mac_list) {
> - /* Don't prune own node. Neither time_in[HSR_PT_SLAVE_A]
> - * nor time_in[HSR_PT_SLAVE_B], will ever be updated for
> - * the master port. Thus the master node will be repeatedly
> - * pruned leading to packet loss.
> - */
> - if (hsr_addr_is_self(hsr, node->macaddress_A))
> - continue;
> -
> - /* Shorthand */
> - time_a = node->time_in[HSR_PT_SLAVE_A];
> - time_b = node->time_in[HSR_PT_SLAVE_B];
> -
> - /* Check for timestamps old enough to risk wrap-around */
> - if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
> - node->time_in_stale[HSR_PT_SLAVE_A] = true;
> - if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
> - node->time_in_stale[HSR_PT_SLAVE_B] = true;
> -
> - /* Get age of newest frame from node.
> - * At least one time_in is OK here; nodes get pruned long
> - * before both time_ins can get stale
> - */
> - timestamp = time_a;
> - if (node->time_in_stale[HSR_PT_SLAVE_A] ||
> - (!node->time_in_stale[HSR_PT_SLAVE_B] &&
> - time_after(time_b, time_a)))
> - timestamp = time_b;
> -
> - /* Warn of ring error only as long as we get frames at all */
> - if (time_is_after_jiffies(timestamp +
> - msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
> - rcu_read_lock();
> - port = get_late_port(hsr, node);
> - if (port)
> - hsr_nl_ringerror(hsr, node->macaddress_A, port);
> - rcu_read_unlock();
> - }
>
> - /* Prune old entries */
> - if (time_is_before_jiffies(timestamp +
> + for (i = 0; i < hsr->hash_buckets; i++) {
> + hlist_for_each_entry_safe(node, tmp, &hsr->node_db[i],
> + mac_list) {
> + /* Don't prune own node.
> + * Neither time_in[HSR_PT_SLAVE_A]
> + * nor time_in[HSR_PT_SLAVE_B], will ever be updated
> + * for the master port. Thus the master node will be
> + * repeatedly pruned leading to packet loss.
> + */
> + if (hsr_addr_is_self(hsr, node->macaddress_A))
> + continue;
> +
> + /* Shorthand */
> + time_a = node->time_in[HSR_PT_SLAVE_A];
> + time_b = node->time_in[HSR_PT_SLAVE_B];
> +
> + /* Check for timestamps old enough to
> + * risk wrap-around
> + */
> + if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
> + node->time_in_stale[HSR_PT_SLAVE_A] = true;
> + if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
> + node->time_in_stale[HSR_PT_SLAVE_B] = true;
> +
> + /* Get age of newest frame from node.
> + * At least one time_in is OK here; nodes get pruned
> + * long before both time_ins can get stale
> + */
> + timestamp = time_a;
> + if (node->time_in_stale[HSR_PT_SLAVE_A] ||
> + (!node->time_in_stale[HSR_PT_SLAVE_B] &&
> + time_after(time_b, time_a)))
> + timestamp = time_b;
> +
> + /* Warn of ring error only as long as we get
> + * frames at all
> + */
> + if (time_is_after_jiffies(timestamp +
> + msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
> + rcu_read_lock();
> + port = get_late_port(hsr, node);
> + if (port)
> + hsr_nl_ringerror(hsr,
> + node->macaddress_A, port);
> + rcu_read_unlock();
> + }
> +
> + /* Prune old entries */
> + if (time_is_before_jiffies(timestamp +
> msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
> - hsr_nl_nodedown(hsr, node->macaddress_A);
> - list_del_rcu(&node->mac_list);
> - /* Note that we need to free this entry later: */
> - kfree_rcu(node, rcu_head);
> + hsr_nl_nodedown(hsr, node->macaddress_A);
> + hlist_del_rcu(&node->mac_list);
> + /* Note that we need to free this
> + * entry later:
> + */
> + kfree_rcu(node, rcu_head);
> + }
> }
> }
> spin_unlock_bh(&hsr->list_lock);
> @@ -557,17 +591,19 @@ void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
> unsigned char addr[ETH_ALEN])
> {
> struct hsr_node *node;
> + u32 hash;
> +
> + hash = hsr_mac_hash(hsr, addr);
>
> if (!_pos) {
> - node = list_first_or_null_rcu(&hsr->node_db,
> - struct hsr_node, mac_list);
> + node = hsr_node_get_first(&hsr->node_db[hash]);
> if (node)
> ether_addr_copy(addr, node->macaddress_A);
> return node;
> }
>
> node = _pos;
> - list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) {
> + hlist_for_each_entry_continue_rcu(node, mac_list) {
> ether_addr_copy(addr, node->macaddress_A);
> return node;
> }
> @@ -587,8 +623,11 @@ int hsr_get_node_data(struct hsr_priv *hsr,
> struct hsr_node *node;
> struct hsr_port *port;
> unsigned long tdiff;
> + u32 hash;
> +
> + hash = hsr_mac_hash(hsr, addr);
>
> - node = find_node_by_addr_A(&hsr->node_db, addr);
> + node = find_node_by_addr_A(&hsr->node_db[hash], addr);
> if (!node)
> return -ENOENT;
>
> diff --git a/net/hsr/hsr_framereg.h b/net/hsr/hsr_framereg.h
> index bdbb8c822ba1..d7cce6b161e3 100644
> --- a/net/hsr/hsr_framereg.h
> +++ b/net/hsr/hsr_framereg.h
> @@ -28,9 +28,11 @@ struct hsr_frame_info {
> bool is_from_san;
> };
>
> +u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr);
> +struct hsr_node *hsr_node_get_first(struct hlist_head *head);
> void hsr_del_self_node(struct hsr_priv *hsr);
> -void hsr_del_nodes(struct list_head *node_db);
> -struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
> +void hsr_del_nodes(struct hlist_head *node_db);
> +struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
> struct sk_buff *skb, bool is_sup,
> enum hsr_port_type rx_port);
> void hsr_handle_sup_frame(struct hsr_frame_info *frame);
> @@ -68,7 +70,7 @@ void prp_handle_san_frame(bool san, enum hsr_port_type port,
> void prp_update_san_info(struct hsr_node *node, bool is_sup);
>
> struct hsr_node {
> - struct list_head mac_list;
> + struct hlist_node mac_list;
> unsigned char macaddress_A[ETH_ALEN];
> unsigned char macaddress_B[ETH_ALEN];
> /* Local slave through which AddrB frames are received from this node */
> diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h
> index ff9ec7634218..f83427d5a246 100644
> --- a/net/hsr/hsr_main.h
> +++ b/net/hsr/hsr_main.h
> @@ -63,6 +63,9 @@ struct hsr_tag {
>
> #define HSR_V1_SUP_LSDUSIZE 52
>
> +#define HSR_HSIZE_SHIFT 8
> +#define HSR_HSIZE BIT(HSR_HSIZE_SHIFT)
> +
> /* The helper functions below assumes that 'path' occupies the 4 most
> * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
> * equivalently, the 4 most significant bits of HSR tag byte 14).
> @@ -201,8 +204,8 @@ struct hsr_proto_ops {
> struct hsr_priv {
> struct rcu_head rcu_head;
> struct list_head ports;
> - struct list_head node_db; /* Known HSR nodes */
> - struct list_head self_node_db; /* MACs of slaves */
> + struct hlist_head node_db[HSR_HSIZE]; /* Known HSR nodes */
> + struct hlist_head self_node_db; /* MACs of slaves */
> struct timer_list announce_timer; /* Supervision frame dispatch */
> struct timer_list prune_timer;
> int announce_count;
> @@ -212,6 +215,8 @@ struct hsr_priv {
> spinlock_t seqnr_lock; /* locking for sequence_nr */
> spinlock_t list_lock; /* locking for node list */
> struct hsr_proto_ops *proto_ops;
> + u32 hash_buckets;
> + u32 hash_seed;
> #define PRP_LAN_ID 0x5 /* 0x1010 for A and 0x1011 for B. Bit 0 is set
> * based on SLAVE_A or SLAVE_B
> */
> diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
> index f3c8f91dbe2c..1405c037cf7a 100644
> --- a/net/hsr/hsr_netlink.c
> +++ b/net/hsr/hsr_netlink.c
> @@ -105,6 +105,7 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
> static void hsr_dellink(struct net_device *dev, struct list_head *head)
> {
> struct hsr_priv *hsr = netdev_priv(dev);
> + int i;
>
> del_timer_sync(&hsr->prune_timer);
> del_timer_sync(&hsr->announce_timer);
> @@ -113,7 +114,8 @@ static void hsr_dellink(struct net_device *dev, struct list_head *head)
> hsr_del_ports(hsr);
>
> hsr_del_self_node(hsr);
> - hsr_del_nodes(&hsr->node_db);
> + for (i = 0; i < hsr->hash_buckets; i++)
> + hsr_del_nodes(&hsr->node_db[i]);
>
> unregister_netdevice_queue(dev, head);
> }
> --
> 2.25.1
>
--
There are some indent warnings in net/hsr/hsr_framereg.c.
I'll fix it and send v4 soon.
Thank you.
Best regards,
Juhee Kang
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