[SRU][F:linux-bluefield][PATCH 23/32] bonding: Add array of all slaves
Daniel Jurgens
danielj at nvidia.com
Mon May 3 19:39:08 UTC 2021
From: Maor Gottlieb <maorg at mellanox.com>
BugLink: https://bugs.launchpad.net/bugs/1926994
Keep all slaves in array so it could be used to get the xmit slave
assume all the slaves are active.
The logic to add slave to the array is like the usable slaves, except
that we also add slaves that currently can't transmit - not up or active.
Signed-off-by: Maor Gottlieb <maorg at mellanox.com>
Reviewed-by: Jiri Pirko <jiri at mellanox.com>
Reviewed-by: Jay Vosburgh <jay.vosburgh at canonical.com>
Acked-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Saeed Mahameed <saeedm at mellanox.com>
(cherry picked from commit 6b447e76ed44cc354cd0a346b86efe393e603e0d)
Signed-off-by: Daniel Jurgens <danielj at nvidia.com>
---
drivers/net/bonding/bond_main.c | 78 +++++++++++++++++++++++++++++++----------
include/net/bonding.h | 3 +-
2 files changed, 61 insertions(+), 20 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 95de414..3a1cdb1 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4189,6 +4189,38 @@ static void bond_skip_slave(struct bond_up_slave *slaves,
}
}
+static void bond_set_slave_arr(struct bonding *bond,
+ struct bond_up_slave *usable_slaves,
+ struct bond_up_slave *all_slaves)
+{
+ struct bond_up_slave *usable, *all;
+
+ usable = rtnl_dereference(bond->usable_slaves);
+ rcu_assign_pointer(bond->usable_slaves, usable_slaves);
+ kfree_rcu(usable, rcu);
+
+ all = rtnl_dereference(bond->all_slaves);
+ rcu_assign_pointer(bond->all_slaves, all_slaves);
+ kfree_rcu(all, rcu);
+}
+
+static void bond_reset_slave_arr(struct bonding *bond)
+{
+ struct bond_up_slave *usable, *all;
+
+ usable = rtnl_dereference(bond->usable_slaves);
+ if (usable) {
+ RCU_INIT_POINTER(bond->usable_slaves, NULL);
+ kfree_rcu(usable, rcu);
+ }
+
+ all = rtnl_dereference(bond->all_slaves);
+ if (all) {
+ RCU_INIT_POINTER(bond->all_slaves, NULL);
+ kfree_rcu(all, rcu);
+ }
+}
+
/* Build the usable slaves array in control path for modes that use xmit-hash
* to determine the slave interface -
* (a) BOND_MODE_8023AD
@@ -4199,7 +4231,7 @@ static void bond_skip_slave(struct bond_up_slave *slaves,
*/
int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
{
- struct bond_up_slave *usable_slaves, *old_usable_slaves;
+ struct bond_up_slave *usable_slaves = NULL, *all_slaves = NULL;
struct slave *slave;
struct list_head *iter;
int agg_id = 0;
@@ -4211,7 +4243,9 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
usable_slaves = kzalloc(struct_size(usable_slaves, arr,
bond->slave_cnt), GFP_KERNEL);
- if (!usable_slaves) {
+ all_slaves = kzalloc(struct_size(all_slaves, arr,
+ bond->slave_cnt), GFP_KERNEL);
+ if (!usable_slaves || !all_slaves) {
ret = -ENOMEM;
goto out;
}
@@ -4220,20 +4254,19 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
pr_debug("bond_3ad_get_active_agg_info failed\n");
- kfree_rcu(usable_slaves, rcu);
/* No active aggragator means it's not safe to use
* the previous array.
*/
- old_usable_slaves = rtnl_dereference(bond->usable_slaves);
- if (old_usable_slaves) {
- RCU_INIT_POINTER(bond->usable_slaves, NULL);
- kfree_rcu(old_usable_slaves, rcu);
- }
+ bond_reset_slave_arr(bond);
goto out;
}
agg_id = ad_info.aggregator_id;
}
bond_for_each_slave(bond, slave, iter) {
+ if (skipslave == slave)
+ continue;
+
+ all_slaves->arr[all_slaves->count++] = slave;
if (BOND_MODE(bond) == BOND_MODE_8023AD) {
struct aggregator *agg;
@@ -4243,8 +4276,6 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
}
if (!bond_slave_can_tx(slave))
continue;
- if (skipslave == slave)
- continue;
slave_dbg(bond->dev, slave->dev, "Adding slave to tx hash array[%d]\n",
usable_slaves->count);
@@ -4252,14 +4283,17 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
usable_slaves->arr[usable_slaves->count++] = slave;
}
- old_usable_slaves = rtnl_dereference(bond->usable_slaves);
- rcu_assign_pointer(bond->usable_slaves, usable_slaves);
- if (old_usable_slaves)
- kfree_rcu(old_usable_slaves, rcu);
+ bond_set_slave_arr(bond, usable_slaves, all_slaves);
+ return ret;
out:
- if (ret != 0 && skipslave)
+ if (ret != 0 && skipslave) {
+ bond_skip_slave(rtnl_dereference(bond->all_slaves),
+ skipslave);
bond_skip_slave(rtnl_dereference(bond->usable_slaves),
skipslave);
+ }
+ kfree_rcu(all_slaves, rcu);
+ kfree_rcu(usable_slaves, rcu);
return ret;
}
@@ -4594,9 +4628,9 @@ void bond_setup(struct net_device *bond_dev)
static void bond_uninit(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
+ struct bond_up_slave *usable, *all;
struct list_head *iter;
struct slave *slave;
- struct bond_up_slave *arr;
bond_netpoll_cleanup(bond_dev);
@@ -4605,10 +4639,16 @@ static void bond_uninit(struct net_device *bond_dev)
__bond_release_one(bond_dev, slave->dev, true, true);
netdev_info(bond_dev, "Released all slaves\n");
- arr = rtnl_dereference(bond->usable_slaves);
- if (arr) {
+ usable = rtnl_dereference(bond->usable_slaves);
+ if (usable) {
RCU_INIT_POINTER(bond->usable_slaves, NULL);
- kfree_rcu(arr, rcu);
+ kfree_rcu(usable, rcu);
+ }
+
+ all = rtnl_dereference(bond->all_slaves);
+ if (all) {
+ RCU_INIT_POINTER(bond->all_slaves, NULL);
+ kfree_rcu(all, rcu);
}
list_del(&bond->bond_list);
diff --git a/include/net/bonding.h b/include/net/bonding.h
index dd3a57f..8603f62 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -208,7 +208,8 @@ struct bonding {
struct slave __rcu *curr_active_slave;
struct slave __rcu *current_arp_slave;
struct slave __rcu *primary_slave;
- struct bond_up_slave __rcu *usable_slaves; /* Array of usable slaves */
+ struct bond_up_slave __rcu *usable_slaves;
+ struct bond_up_slave __rcu *all_slaves;
bool force_primary;
s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
int (*recv_probe)(const struct sk_buff *, struct bonding *,
--
1.8.3.1
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