[PATCH V4 mlx5-next 02/15] bonding: Export skip slave logic to function

Maor Gottlieb
2020-04-22T08:40:08Z

As a preparation for following change that add array of
all slaves, extract code that skip slave to function.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jay Vosburgh <jay.vosburgh@canonical.com>
---
drivers/net/bonding/bond_main.c | 47 ++++++++++++++++++---------------
1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 2e70e43c5df5..f7aded014f08 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4087,6 +4087,29 @@ static void bond_slave_arr_handler(struct work_struct *work)
bond_slave_arr_work_rearm(bond, 1);
}

+static void bond_skip_slave(struct bond_up_slave *slaves,
+ struct slave *skipslave)
+{
+ int idx;
+
+ /* Rare situation where caller has asked to skip a specific
+ * slave but allocation failed (most likely!). BTW this is
+ * only possible when the call is initiated from
+ * __bond_release_one(). In this situation; overwrite the
+ * skipslave entry in the array with the last entry from the
+ * array to avoid a situation where the xmit path may choose
+ * this to-be-skipped slave to send a packet out.
+ */
+ for (idx = 0; slaves && idx < slaves->count; idx++) {
+ if (skipslave == slaves->arr[idx]) {
+ slaves->arr[idx] =
+ slaves->arr[slaves->count - 1];
+ slaves->count--;
+ break;
+ }
+ }
+}
+
/* Build the usable slaves array in control path for modes that use xmit-hash
* to determine the slave interface -
* (a) BOND_MODE_8023AD
@@ -4156,27 +4179,9 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
if (old_arr)
kfree_rcu(old_arr, rcu);
out:
- if (ret != 0 && skipslave) {
- int idx;
-
- /* Rare situation where caller has asked to skip a specific
- * slave but allocation failed (most likely!). BTW this is
- * only possible when the call is initiated from
- * __bond_release_one(). In this situation; overwrite the
- * skipslave entry in the array with the last entry from the
- * array to avoid a situation where the xmit path may choose
- * this to-be-skipped slave to send a packet out.
- */
- old_arr = rtnl_dereference(bond->slave_arr);
- for (idx = 0; old_arr != NULL && idx < old_arr->count; idx++) {
- if (skipslave == old_arr->arr[idx]) {
- old_arr->arr[idx] =
- old_arr->arr[old_arr->count-1];
- old_arr->count--;
- break;
- }
- }
- }
+ if (ret != 0 && skipslave)
+ bond_skip_slave(rtnl_dereference(bond->slave_arr), skipslave);
+
return ret;
}

--
2.17.2