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-rw-r--r--drivers/net/bonding/bond_alb.c197
-rw-r--r--drivers/net/bonding/bond_alb.h28
-rw-r--r--drivers/net/bonding/bond_debugfs.c5
-rw-r--r--drivers/net/bonding/bond_main.c19
-rw-r--r--drivers/net/bonding/bonding.h13
5 files changed, 210 insertions, 52 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index e15cc11edbbe..7c9d136e74be 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -84,6 +84,10 @@ static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
/* Forward declaration */
static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]);
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
+static void rlb_src_unlink(struct bonding *bond, u32 index);
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
+ u32 ip_dst_hash);
static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
{
@@ -354,6 +358,18 @@ static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
if (!arp)
goto out;
+ /* We received an ARP from arp->ip_src.
+ * We might have used this IP address previously (on the bonding host
+ * itself or on a system that is bridged together with the bond).
+ * However, if arp->mac_src is different than what is stored in
+ * rx_hashtbl, some other host is now using the IP and we must prevent
+ * sending out client updates with this IP address and the old MAC
+ * address.
+ * Clean up all hash table entries that have this address as ip_src but
+ * have a different mac_src.
+ */
+ rlb_purge_src_ip(bond, arp);
+
if (arp->op_code == htons(ARPOP_REPLY)) {
/* update rx hash table for this ARP */
rlb_update_entry_from_arp(bond, arp);
@@ -432,9 +448,9 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
_lock_rx_hashtbl_bh(bond);
rx_hash_table = bond_info->rx_hashtbl;
- index = bond_info->rx_hashtbl_head;
+ index = bond_info->rx_hashtbl_used_head;
for (; index != RLB_NULL_INDEX; index = next_index) {
- next_index = rx_hash_table[index].next;
+ next_index = rx_hash_table[index].used_next;
if (rx_hash_table[index].slave == slave) {
struct slave *assigned_slave = rlb_next_rx_slave(bond);
@@ -519,8 +535,9 @@ static void rlb_update_rx_clients(struct bonding *bond)
_lock_rx_hashtbl_bh(bond);
- hash_index = bond_info->rx_hashtbl_head;
- for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
if (client_info->ntt) {
rlb_update_client(client_info);
@@ -548,8 +565,9 @@ static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *sla
_lock_rx_hashtbl_bh(bond);
- hash_index = bond_info->rx_hashtbl_head;
- for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
if ((client_info->slave == slave) &&
@@ -578,8 +596,9 @@ static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
_lock_rx_hashtbl(bond);
- hash_index = bond_info->rx_hashtbl_head;
- for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
if (!client_info->slave) {
@@ -625,6 +644,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
/* update mac address from arp */
memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
}
+ memcpy(client_info->mac_src, arp->mac_src, ETH_ALEN);
assigned_slave = client_info->slave;
if (assigned_slave) {
@@ -647,6 +667,17 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
assigned_slave = rlb_next_rx_slave(bond);
if (assigned_slave) {
+ if (!(client_info->assigned &&
+ client_info->ip_src == arp->ip_src)) {
+ /* ip_src is going to be updated,
+ * fix the src hash list
+ */
+ u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
+ sizeof(arp->ip_src));
+ rlb_src_unlink(bond, hash_index);
+ rlb_src_link(bond, hash_src, hash_index);
+ }
+
client_info->ip_src = arp->ip_src;
client_info->ip_dst = arp->ip_dst;
/* arp->mac_dst is broadcast for arp reqeusts.
@@ -654,6 +685,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
* upon receiving an arp reply.
*/
memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
+ memcpy(client_info->mac_src, arp->mac_src, ETH_ALEN);
client_info->slave = assigned_slave;
if (!ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
@@ -669,11 +701,11 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
}
if (!client_info->assigned) {
- u32 prev_tbl_head = bond_info->rx_hashtbl_head;
- bond_info->rx_hashtbl_head = hash_index;
- client_info->next = prev_tbl_head;
+ u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
+ bond_info->rx_hashtbl_used_head = hash_index;
+ client_info->used_next = prev_tbl_head;
if (prev_tbl_head != RLB_NULL_INDEX) {
- bond_info->rx_hashtbl[prev_tbl_head].prev =
+ bond_info->rx_hashtbl[prev_tbl_head].used_prev =
hash_index;
}
client_info->assigned = 1;
@@ -694,6 +726,12 @@ static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
struct arp_pkt *arp = arp_pkt(skb);
struct slave *tx_slave = NULL;
+ /* Don't modify or load balance ARPs that do not originate locally
+ * (e.g.,arrive via a bridge).
+ */
+ if (!bond_slave_has_mac(bond, arp->mac_src))
+ return NULL;
+
if (arp->op_code == htons(ARPOP_REPLY)) {
/* the arp must be sent on the selected
* rx channel
@@ -740,8 +778,9 @@ static void rlb_rebalance(struct bonding *bond)
_lock_rx_hashtbl_bh(bond);
ntt = 0;
- hash_index = bond_info->rx_hashtbl_head;
- for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
assigned_slave = rlb_next_rx_slave(bond);
if (assigned_slave && (client_info->slave != assigned_slave)) {
@@ -759,11 +798,113 @@ static void rlb_rebalance(struct bonding *bond)
}
/* Caller must hold rx_hashtbl lock */
+static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
+{
+ entry->used_next = RLB_NULL_INDEX;
+ entry->used_prev = RLB_NULL_INDEX;
+ entry->assigned = 0;
+ entry->slave = NULL;
+ entry->tag = 0;
+}
+static void rlb_init_table_entry_src(struct rlb_client_info *entry)
+{
+ entry->src_first = RLB_NULL_INDEX;
+ entry->src_prev = RLB_NULL_INDEX;
+ entry->src_next = RLB_NULL_INDEX;
+}
+
static void rlb_init_table_entry(struct rlb_client_info *entry)
{
memset(entry, 0, sizeof(struct rlb_client_info));
- entry->next = RLB_NULL_INDEX;
- entry->prev = RLB_NULL_INDEX;
+ rlb_init_table_entry_dst(entry);
+ rlb_init_table_entry_src(entry);
+}
+
+static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next_index = bond_info->rx_hashtbl[index].used_next;
+ u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
+
+ if (index == bond_info->rx_hashtbl_used_head)
+ bond_info->rx_hashtbl_used_head = next_index;
+ if (prev_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[prev_index].used_next = next_index;
+ if (next_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next_index].used_prev = prev_index;
+}
+
+/* unlink a rlb hash table entry from the src list */
+static void rlb_src_unlink(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next_index = bond_info->rx_hashtbl[index].src_next;
+ u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
+
+ bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
+ bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
+
+ if (next_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next_index].src_prev = prev_index;
+
+ if (prev_index == RLB_NULL_INDEX)
+ return;
+
+ /* is prev_index pointing to the head of this list? */
+ if (bond_info->rx_hashtbl[prev_index].src_first == index)
+ bond_info->rx_hashtbl[prev_index].src_first = next_index;
+ else
+ bond_info->rx_hashtbl[prev_index].src_next = next_index;
+
+}
+
+static void rlb_delete_table_entry(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+
+ rlb_delete_table_entry_dst(bond, index);
+ rlb_init_table_entry_dst(entry);
+
+ rlb_src_unlink(bond, index);
+}
+
+/* add the rx_hashtbl[ip_dst_hash] entry to the list
+ * of entries with identical ip_src_hash
+ */
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next;
+
+ bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
+ next = bond_info->rx_hashtbl[ip_src_hash].src_first;
+ bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
+ if (next != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
+ bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
+}
+
+/* deletes all rx_hashtbl entries with arp->ip_src if their mac_src does
+ * not match arp->mac_src */
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 ip_src_hash = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src));
+ u32 index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ index = bond_info->rx_hashtbl[ip_src_hash].src_first;
+ while (index != RLB_NULL_INDEX) {
+ struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+ u32 next_index = entry->src_next;
+ if (entry->ip_src == arp->ip_src &&
+ !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
+ rlb_delete_table_entry(bond, index);
+ index = next_index;
+ }
+ _unlock_rx_hashtbl_bh(bond);
}
static int rlb_initialize(struct bonding *bond)
@@ -781,7 +922,7 @@ static int rlb_initialize(struct bonding *bond)
bond_info->rx_hashtbl = new_hashtbl;
- bond_info->rx_hashtbl_head = RLB_NULL_INDEX;
+ bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) {
rlb_init_table_entry(bond_info->rx_hashtbl + i);
@@ -803,7 +944,7 @@ static void rlb_deinitialize(struct bonding *bond)
kfree(bond_info->rx_hashtbl);
bond_info->rx_hashtbl = NULL;
- bond_info->rx_hashtbl_head = RLB_NULL_INDEX;
+ bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
_unlock_rx_hashtbl_bh(bond);
}
@@ -815,25 +956,13 @@ static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
_lock_rx_hashtbl_bh(bond);
- curr_index = bond_info->rx_hashtbl_head;
+ curr_index = bond_info->rx_hashtbl_used_head;
while (curr_index != RLB_NULL_INDEX) {
struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
- u32 next_index = bond_info->rx_hashtbl[curr_index].next;
- u32 prev_index = bond_info->rx_hashtbl[curr_index].prev;
-
- if (curr->tag && (curr->vlan_id == vlan_id)) {
- if (curr_index == bond_info->rx_hashtbl_head) {
- bond_info->rx_hashtbl_head = next_index;
- }
- if (prev_index != RLB_NULL_INDEX) {
- bond_info->rx_hashtbl[prev_index].next = next_index;
- }
- if (next_index != RLB_NULL_INDEX) {
- bond_info->rx_hashtbl[next_index].prev = prev_index;
- }
+ u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
- rlb_init_table_entry(curr);
- }
+ if (curr->tag && (curr->vlan_id == vlan_id))
+ rlb_delete_table_entry(bond, curr_index);
curr_index = next_index;
}
diff --git a/drivers/net/bonding/bond_alb.h b/drivers/net/bonding/bond_alb.h
index 90f140a2d197..e7a5b8b37ea3 100644
--- a/drivers/net/bonding/bond_alb.h
+++ b/drivers/net/bonding/bond_alb.h
@@ -94,15 +94,35 @@ struct tlb_client_info {
/* -------------------------------------------------------------------------
* struct rlb_client_info contains all info related to a specific rx client
- * connection. This is the Clients Hash Table entry struct
+ * connection. This is the Clients Hash Table entry struct.
+ * Note that this is not a proper hash table; if a new client's IP address
+ * hash collides with an existing client entry, the old entry is replaced.
+ *
+ * There is a linked list (linked by the used_next and used_prev members)
+ * linking all the used entries of the hash table. This allows updating
+ * all the clients without walking over all the unused elements of the table.
+ *
+ * There are also linked lists of entries with identical hash(ip_src). These
+ * allow cleaning up the table from ip_src<->mac_src associations that have
+ * become outdated and would cause sending out invalid ARP updates to the
+ * network. These are linked by the (src_next and src_prev members).
* -------------------------------------------------------------------------
*/
struct rlb_client_info {
__be32 ip_src; /* the server IP address */
__be32 ip_dst; /* the client IP address */
+ u8 mac_src[ETH_ALEN]; /* the server MAC address */
u8 mac_dst[ETH_ALEN]; /* the client MAC address */
- u32 next; /* The next Hash table entry index */
- u32 prev; /* The previous Hash table entry index */
+
+ /* list of used hash table entries, starting at rx_hashtbl_used_head */
+ u32 used_next;
+ u32 used_prev;
+
+ /* ip_src based hashing */
+ u32 src_next; /* next entry with same hash(ip_src) */
+ u32 src_prev; /* prev entry with same hash(ip_src) */
+ u32 src_first; /* first entry with hash(ip_src) == this entry's index */
+
u8 assigned; /* checking whether this entry is assigned */
u8 ntt; /* flag - need to transmit client info */
struct slave *slave; /* the slave assigned to this client */
@@ -131,7 +151,7 @@ struct alb_bond_info {
int rlb_enabled;
struct rlb_client_info *rx_hashtbl; /* Receive hash table */
spinlock_t rx_hashtbl_lock;
- u32 rx_hashtbl_head;
+ u32 rx_hashtbl_used_head;
u8 rx_ntt; /* flag - need to transmit
* to all rx clients
*/
diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
index 2cf084eb9d52..5fc4c2351478 100644
--- a/drivers/net/bonding/bond_debugfs.c
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -31,8 +31,9 @@ static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
- hash_index = bond_info->rx_hashtbl_head;
- for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
&client_info->ip_src,
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index a7d47350ea4b..ef2cb2418535 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -615,15 +615,9 @@ static int bond_check_dev_link(struct bonding *bond,
return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
/* Try to get link status using Ethtool first. */
- if (slave_dev->ethtool_ops) {
- if (slave_dev->ethtool_ops->get_link) {
- u32 link;
-
- link = slave_dev->ethtool_ops->get_link(slave_dev);
-
- return link ? BMSR_LSTATUS : 0;
- }
- }
+ if (slave_dev->ethtool_ops->get_link)
+ return slave_dev->ethtool_ops->get_link(slave_dev) ?
+ BMSR_LSTATUS : 0;
/* Ethtool can't be used, fallback to MII ioctls. */
ioctl = slave_ops->ndo_do_ioctl;
@@ -1510,8 +1504,9 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
int link_reporting;
int res = 0;
- if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
- slave_ops->ndo_do_ioctl == NULL) {
+ if (!bond->params.use_carrier &&
+ slave_dev->ethtool_ops->get_link == NULL &&
+ slave_ops->ndo_do_ioctl == NULL) {
pr_warning("%s: Warning: no link monitoring support for %s\n",
bond_dev->name, slave_dev->name);
}
@@ -1838,7 +1833,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
* anyway (it holds no special properties of the bond device),
* so we can change it without calling change_active_interface()
*/
- if (!bond->curr_active_slave)
+ if (!bond->curr_active_slave && new_slave->link == BOND_LINK_UP)
bond->curr_active_slave = new_slave;
break;
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index f8af2fcd3d16..6dded569b111 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -22,6 +22,7 @@
#include <linux/in6.h>
#include <linux/netpoll.h>
#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
#include "bond_3ad.h"
#include "bond_alb.h"
@@ -450,6 +451,18 @@ static inline void bond_destroy_proc_dir(struct bond_net *bn)
}
#endif
+static inline struct slave *bond_slave_has_mac(struct bonding *bond,
+ const u8 *mac)
+{
+ int i = 0;
+ struct slave *tmp;
+
+ bond_for_each_slave(bond, tmp, i)
+ if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
+ return tmp;
+
+ return NULL;
+}
/* exported from bond_main.c */
extern int bond_net_id;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-27 11:40:26 +0300