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Date: Mon, 31 Oct 2016 15:29:37 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
guru.anbalagane@...cle.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 07/22] i40e: implement __i40e_del_filter and use where applicable
From: Jacob Keller <jacob.e.keller@...el.com>
When inside a loop where we call i40e_del_filter we use an O(n^2)
pattern where i40e_del_filter calls i40e_find_filter for us. We can
avoid this O(n^2) logic by factoring a function, __i40e_del_filter() out
from the i40e_del_filter code. This allows us to re-use the delete logic
where appropriate without having to search for the filter twice.
This new function benefits several functions including i40e_vsi_add_vlan,
i40e_vsi_kill_vlan, i40e_del_mac_vlan_all, and i40e_vsi_release.
Change-ID: I75fabe0f53bf73f56b80d342e5fdcfcc28f4d3eb
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 92 ++++++++++++++++++-----------
1 file changed, 59 insertions(+), 33 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 86ad953..25db8d8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1271,10 +1271,13 @@ struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
}
/**
- * i40e_del_filter - Remove a mac/vlan filter from the VSI
- * @vsi: the VSI to be searched
- * @macaddr: the MAC address
- * @vlan: the vlan
+ * __i40e_del_filter - Remove a specific filter from the VSI
+ * @vsi: VSI to remove from
+ * @f: the filter to remove from the list
+ *
+ * This function should be called instead of i40e_del_filter only if you know
+ * the exact filter you will remove already, such as via i40e_find_filter or
+ * i40e_find_mac.
*
* NOTE: This function is expected to be called with mac_filter_list_lock
* being held.
@@ -1282,14 +1285,8 @@ struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
* the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
* instead of list_for_each_entry().
**/
-void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
+static void __i40e_del_filter(struct i40e_vsi *vsi, struct i40e_mac_filter *f)
{
- struct i40e_mac_filter *f;
-
- if (!vsi || !macaddr)
- return;
-
- f = i40e_find_filter(vsi, macaddr, vlan);
if (!f)
return;
@@ -1308,6 +1305,29 @@ void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
}
/**
+ * i40e_del_filter - Remove a MAC/VLAN filter from the VSI
+ * @vsi: the VSI to be searched
+ * @macaddr: the MAC address
+ * @vlan: the VLAN
+ *
+ * NOTE: This function is expected to be called with mac_filter_list_lock
+ * being held.
+ * ANOTHER NOTE: This function MUST be called from within the context of
+ * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
+ * instead of list_for_each_entry().
+ **/
+void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
+{
+ struct i40e_mac_filter *f;
+
+ if (!vsi || !macaddr)
+ return;
+
+ f = i40e_find_filter(vsi, macaddr, vlan);
+ __i40e_del_filter(vsi, f);
+}
+
+/**
* i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
* @vsi: the VSI to be searched
* @macaddr: the mac address to be filtered
@@ -1349,21 +1369,22 @@ struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi,
**/
int i40e_del_mac_all_vlan(struct i40e_vsi *vsi, const u8 *macaddr)
{
- struct i40e_mac_filter *f = NULL;
- int changed = 0;
+ struct i40e_mac_filter *f, *ftmp;
+ bool found = false;
WARN(!spin_is_locked(&vsi->mac_filter_list_lock),
"Missing mac_filter_list_lock\n");
- list_for_each_entry(f, &vsi->mac_filter_list, list) {
- if (ether_addr_equal(macaddr, f->macaddr))
- f->state = I40E_FILTER_REMOVE;
+ list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
+ if (ether_addr_equal(macaddr, f->macaddr)) {
+ __i40e_del_filter(vsi, f);
+ found = true;
+ }
}
- if (changed) {
- vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
- vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
+
+ if (found)
return 0;
- }
- return -ENOENT;
+ else
+ return -ENOENT;
}
/**
@@ -2256,7 +2277,7 @@ static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
**/
int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
{
- struct i40e_mac_filter *f, *ftmp, *add_f;
+ struct i40e_mac_filter *f, *ftmp, *add_f, *del_f;
/* Locked once because all functions invoked below iterates list*/
spin_lock_bh(&vsi->mac_filter_list_lock);
@@ -2290,11 +2311,11 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
* with 0, so we now accept untagged and specified tagged traffic
* (and not all tags along with untagged)
*/
- if (vid > 0) {
- if (vsi->netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
- I40E_VLAN_ANY)) {
- i40e_del_filter(vsi, vsi->netdev->dev_addr,
- I40E_VLAN_ANY);
+ if (vid > 0 && vsi->netdev) {
+ del_f = i40e_find_filter(vsi, vsi->netdev->dev_addr,
+ I40E_VLAN_ANY);
+ if (del_f) {
+ __i40e_del_filter(vsi, del_f);
add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0);
if (!add_f) {
dev_info(&vsi->back->pdev->dev,
@@ -2311,9 +2332,11 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
if (f->state == I40E_FILTER_REMOVE)
continue;
- if (!i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY))
+ del_f = i40e_find_filter(vsi, f->macaddr,
+ I40E_VLAN_ANY);
+ if (!del_f)
continue;
- i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY);
+ __i40e_del_filter(vsi, del_f);
add_f = i40e_add_filter(vsi, f->macaddr, 0);
if (!add_f) {
dev_info(&vsi->back->pdev->dev,
@@ -2353,8 +2376,10 @@ int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
if (vsi->netdev)
i40e_del_filter(vsi, netdev->dev_addr, vid);
- list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
- i40e_del_filter(vsi, f->macaddr, vid);
+ list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
+ if (f->vlan == vid)
+ __i40e_del_filter(vsi, f);
+ }
/* go through all the filters for this VSI and if there is only
* vid == 0 it means there are no other filters, so vid 0 must
@@ -2386,7 +2411,8 @@ int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
if (!filter_count) {
list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
- i40e_del_filter(vsi, f->macaddr, 0);
+ if (!f->vlan)
+ __i40e_del_filter(vsi, f);
add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY);
if (!add_f) {
dev_info(&vsi->back->pdev->dev,
@@ -9455,7 +9481,7 @@ int i40e_vsi_release(struct i40e_vsi *vsi)
/* make sure any remaining filters are marked for deletion */
list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
- i40e_del_filter(vsi, f->macaddr, f->vlan);
+ __i40e_del_filter(vsi, f);
spin_unlock_bh(&vsi->mac_filter_list_lock);
--
2.7.4
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