netdev - [net-next PATCH v2 4/9] net: Move kernel helpers for queue index outside sysfs

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Message-ID: <169266033119.10199.3382453499474113876.stgit@anambiarhost.jf.intel.com>
Date: Mon, 21 Aug 2023 16:25:31 -0700
From: Amritha Nambiar <amritha.nambiar@...el.com>
To: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net
Cc: sridhar.samudrala@...el.com, amritha.nambiar@...el.com
Subject: [net-next PATCH v2 4/9] net: Move kernel helpers for queue index
 outside sysfs

The kernel helpers for retrieving tx/rx queue index
(get_netdev_queue_index and get_netdev_rx_queue_index)
are restricted to sysfs, move this out for more usability.
Also, replace BUG_ON with DEBUG_NET_WARN_ON_ONCE.

Signed-off-by: Amritha Nambiar <amritha.nambiar@...el.com>
---
 include/linux/netdevice.h     |   12 ++++++++++++
 include/net/netdev_rx_queue.h |    4 +---
 net/core/net-sysfs.c          |   11 -----------
 3 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7645c0ba0995..4ec86d9aceb2 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2503,6 +2503,18 @@ struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
 	return &dev->_tx[index];
 }
 
+static inline
+unsigned int get_netdev_queue_index(struct netdev_queue *queue)
+{
+	struct net_device *dev = queue->dev;
+	unsigned int i;
+
+	i = queue - dev->_tx;
+	DEBUG_NET_WARN_ON_ONCE(i >= dev->num_tx_queues);
+
+	return i;
+}
+
 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
 						    const struct sk_buff *skb)
 {
diff --git a/include/net/netdev_rx_queue.h b/include/net/netdev_rx_queue.h
index 66bda0dfe71c..ac58fa7c2532 100644
--- a/include/net/netdev_rx_queue.h
+++ b/include/net/netdev_rx_queue.h
@@ -42,15 +42,13 @@ __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
 	return dev->_rx + rxq;
 }
 
-#ifdef CONFIG_SYSFS
 static inline unsigned int
 get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
 {
 	struct net_device *dev = queue->dev;
 	int index = queue - dev->_rx;
 
-	BUG_ON(index >= dev->num_rx_queues);
+	DEBUG_NET_WARN_ON_ONCE(index >= dev->num_rx_queues);
 	return index;
 }
 #endif
-#endif
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index fccaa5bac0ed..858d50503e4f 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1240,17 +1240,6 @@ static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf)
 	return sysfs_emit(buf, fmt_ulong, trans_timeout);
 }
 
-static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
-{
-	struct net_device *dev = queue->dev;
-	unsigned int i;
-
-	i = queue - dev->_tx;
-	BUG_ON(i >= dev->num_tx_queues);
-
-	return i;
-}
-
 static ssize_t traffic_class_show(struct netdev_queue *queue,
 				  char *buf)
 {