net: hns3: split function hclge_get_fd_rule_info()

mainline inclusion
from mainline-master
commit a41fb396
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4M1HB
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a41fb3961d8d

----------------------------------------------------------------------

Currently the function hclge_get_fd_rule_info() is a bit long.
Split it to several small functions, to improve readability.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Reviewed-by: NYongxin Li <liyongxin1@huawei.com>
Signed-off-by: NJunxin Chen <chenjunxin1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c

@@ -7172,6 +7172,37 @@ static void hclge_fd_get_ext_info(struct ethtool_rx_flow_spec *fs,
 	}
 }
 
+static struct hclge_fd_rule *hclge_get_fd_rule(struct hclge_dev *hdev,
+					       u16 location)
+{
+	struct hclge_fd_rule *rule = NULL;
+	struct hlist_node *node2;
+
+	hlist_for_each_entry_safe(rule, node2, &hdev->fd_rule_list, rule_node) {
+		if (rule->location == location)
+			return rule;
+		else if (rule->location > location)
+			return NULL;
+	}
+
+	return NULL;
+}
+
+static void hclge_fd_get_ring_cookie(struct ethtool_rx_flow_spec *fs,
+				     struct hclge_fd_rule *rule)
+{
+	if (rule->action == HCLGE_FD_ACTION_DROP_PACKET) {
+		fs->ring_cookie = RX_CLS_FLOW_DISC;
+	} else {
+		u64 vf_id;
+
+		fs->ring_cookie = rule->queue_id;
+		vf_id = rule->vf_id;
+		vf_id <<= ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
+		fs->ring_cookie |= vf_id;
+	}
+}
+
 static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 				  struct ethtool_rxnfc *cmd)
 {
@@ -7179,7 +7210,6 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 	struct hclge_fd_rule *rule = NULL;
 	struct hclge_dev *hdev = vport->back;
 	struct ethtool_rx_flow_spec *fs;
-	struct hlist_node *node2;
 
 	if (!hnae3_dev_fd_supported(hdev))
 		return -EOPNOTSUPP;
@@ -7188,14 +7218,9 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 
 	spin_lock_bh(&hdev->fd_rule_lock);
 
-	hlist_for_each_entry_safe(rule, node2, &hdev->fd_rule_list, rule_node) {
-		if (rule->location >= fs->location)
-			break;
-	}
-
-	if (!rule || fs->location != rule->location) {
+	rule = hclge_get_fd_rule(hdev, fs->location);
+	if (!rule) {
 		spin_unlock_bh(&hdev->fd_rule_lock);
-
 		return -ENOENT;
 	}
 
@@ -7233,16 +7258,7 @@ static int hclge_get_fd_rule_info(struct hnae3_handle *handle,
 
 	hclge_fd_get_ext_info(fs, rule);
 
-	if (rule->action == HCLGE_FD_ACTION_DROP_PACKET) {
-		fs->ring_cookie = RX_CLS_FLOW_DISC;
-	} else {
-		u64 vf_id;
-
-		fs->ring_cookie = rule->queue_id;
-		vf_id = rule->vf_id;
-		vf_id <<= ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
-		fs->ring_cookie |= vf_id;
-	}
+	hclge_fd_get_ring_cookie(fs, rule);
 
 	spin_unlock_bh(&hdev->fd_rule_lock);