From: Guojia Liao <liaoguo...@huawei.com>
[ Upstream commit efe3fa45f770f1d66e2734ee7a3523c75694ff04 ]
When user had created a FD rule, all the aRFS rules should be clear up.
HNS3 process flow as below:
1.get spin lock of fd_ruls_list
2.clear up all aRFS rules
3.release lock
4.get spin lock of fd_ruls_list
5.creat a rules
6.release lock;
There is a short period of time between step 3 and step 4, which would
creatting some new aRFS FD rules if driver was receiving packet.
So refactor the fd_rule_lock to fix it.
Fixes: 441228875706 ("net: hns3: refine the flow director handle")
Signed-off-by: Guojia Liao <liaoguo...@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazh...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
.../hisilicon/hns3/hns3pf/hclge_main.c | 28 ++++++++++---------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index b66b93f320b42..ae4c415b97e45 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5737,9 +5737,9 @@ static int hclge_add_fd_entry(struct hnae3_handle *handle,
/* to avoid rule conflict, when user configure rule by ethtool,
* we need to clear all arfs rules
*/
+ spin_lock_bh(&hdev->fd_rule_lock);
hclge_clear_arfs_rules(handle);
- spin_lock_bh(&hdev->fd_rule_lock);
ret = hclge_fd_config_rule(hdev, rule);
spin_unlock_bh(&hdev->fd_rule_lock);
@@ -5782,6 +5782,7 @@ static int hclge_del_fd_entry(struct hnae3_handle *handle,
return ret;
}
+/* make sure being called after lock up with fd_rule_lock */
static void hclge_del_all_fd_entries(struct hnae3_handle *handle,
bool clear_list)
{
@@ -5794,7 +5795,6 @@ static void hclge_del_all_fd_entries(struct hnae3_handle
*handle,
if (!hnae3_dev_fd_supported(hdev))
return;
- spin_lock_bh(&hdev->fd_rule_lock);
for_each_set_bit(location, hdev->fd_bmap,
hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1])
hclge_fd_tcam_config(hdev, HCLGE_FD_STAGE_1, true, location,
@@ -5811,8 +5811,6 @@ static void hclge_del_all_fd_entries(struct hnae3_handle
*handle,
bitmap_zero(hdev->fd_bmap,
hdev->fd_cfg.rule_num[HCLGE_FD_STAGE_1]);
}
-
- spin_unlock_bh(&hdev->fd_rule_lock);
}
static int hclge_restore_fd_entries(struct hnae3_handle *handle)
@@ -6179,7 +6177,7 @@ static int hclge_add_fd_entry_by_arfs(struct hnae3_handle
*handle, u16 queue_id,
u16 flow_id, struct flow_keys *fkeys)
{
struct hclge_vport *vport = hclge_get_vport(handle);
- struct hclge_fd_rule_tuples new_tuples;
+ struct hclge_fd_rule_tuples new_tuples = {};
struct hclge_dev *hdev = vport->back;
struct hclge_fd_rule *rule;
u16 tmp_queue_id;
@@ -6189,20 +6187,18 @@ static int hclge_add_fd_entry_by_arfs(struct
hnae3_handle *handle, u16 queue_id,
if (!hnae3_dev_fd_supported(hdev))
return -EOPNOTSUPP;
- memset(&new_tuples, 0, sizeof(new_tuples));
- hclge_fd_get_flow_tuples(fkeys, &new_tuples);
-
- spin_lock_bh(&hdev->fd_rule_lock);
-
/* when there is already fd rule existed add by user,
* arfs should not work
*/
+ spin_lock_bh(&hdev->fd_rule_lock);
if (hdev->fd_active_type == HCLGE_FD_EP_ACTIVE) {
spin_unlock_bh(&hdev->fd_rule_lock);
return -EOPNOTSUPP;
}
+ hclge_fd_get_flow_tuples(fkeys, &new_tuples);
+
/* check is there flow director filter existed for this flow,
* if not, create a new filter for it;
* if filter exist with different queue id, modify the filter;
@@ -6287,6 +6283,7 @@ static void hclge_rfs_filter_expire(struct hclge_dev
*hdev)
#endif
}
+/* make sure being called after lock up with fd_rule_lock */
static void hclge_clear_arfs_rules(struct hnae3_handle *handle)
{
#ifdef CONFIG_RFS_ACCEL
@@ -6331,10 +6328,14 @@ static void hclge_enable_fd(struct hnae3_handle
*handle, bool enable)
hdev->fd_en = enable;
clear = hdev->fd_active_type == HCLGE_FD_ARFS_ACTIVE;
- if (!enable)
+
+ if (!enable) {
+ spin_lock_bh(&hdev->fd_rule_lock);
hclge_del_all_fd_entries(handle, clear);
- else
+ spin_unlock_bh(&hdev->fd_rule_lock);
+ } else {
hclge_restore_fd_entries(handle);
+ }
}
static void hclge_cfg_mac_mode(struct hclge_dev *hdev, bool enable)
@@ -6799,8 +6800,9 @@ static void hclge_ae_stop(struct hnae3_handle *handle)
int i;
set_bit(HCLGE_STATE_DOWN, &hdev->state);
-
+ spin_lock_bh(&hdev->fd_rule_lock);
hclge_clear_arfs_rules(handle);
+ spin_unlock_bh(&hdev->fd_rule_lock);
/* If it is not PF reset, the firmware will disable the MAC,
* so it only need to stop phy here.
--
2.25.1
