net: move struct netdev_rx_queue out of netdevice.h

struct netdev_rx_queue is touched in only a few places
and having it defined in netdevice.h brings in the dependency
on xdp.h, because struct xdp_rxq_info gets embedded in
struct netdev_rx_queue.

In prep for removal of xdp.h from netdevice.h move all
the netdev_rx_queue stuff to a new header.

We could technically break the new header up to avoid
the sysfs.h include but it's so rarely included it
doesn't seem to be worth it at this point.
Reviewed-by: Amritha Nambiar <amritha.nambiar@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://lore.kernel.org/r/20230803010230.1755386-3-kuba@kernel.orgSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

drivers/net/virtio_net.c

@@ -22,6 +22,7 @@
 #include <net/route.h>
 #include <net/xdp.h>
 #include <net/net_failover.h>
+#include <net/netdev_rx_queue.h>
 
 static int napi_weight = NAPI_POLL_WEIGHT;
 module_param(napi_weight, int, 0444);

include/linux/netdevice.h

@@ -782,32 +782,6 @@ bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
 #endif
 #endif /* CONFIG_RPS */
 
-/* This structure contains an instance of an RX queue. */
-struct netdev_rx_queue {
-	struct xdp_rxq_info		xdp_rxq;
-#ifdef CONFIG_RPS
-	struct rps_map __rcu		*rps_map;
-	struct rps_dev_flow_table __rcu	*rps_flow_table;
-#endif
-	struct kobject			kobj;
-	struct net_device		*dev;
-	netdevice_tracker		dev_tracker;
-
-#ifdef CONFIG_XDP_SOCKETS
-	struct xsk_buff_pool            *pool;
-#endif
-} ____cacheline_aligned_in_smp;
-
-/*
- * RX queue sysfs structures and functions.
- */
-struct rx_queue_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
-	ssize_t (*store)(struct netdev_rx_queue *queue,
-			 const char *buf, size_t len);
-};
-
 /* XPS map type and offset of the xps map within net_device->xps_maps[]. */
 enum xps_map_type {
 	XPS_CPUS = 0,
@@ -3828,24 +3802,6 @@ static inline int netif_set_real_num_rx_queues(struct net_device *dev,
 int netif_set_real_num_queues(struct net_device *dev,
 			      unsigned int txq, unsigned int rxq);
 
-static inline struct netdev_rx_queue *
-__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);
-	return index;
-}
-#endif
-
 int netif_get_num_default_rss_queues(void);
 
 void dev_kfree_skb_irq_reason(struct sk_buff *skb, enum skb_drop_reason reason);

include/net/netdev_rx_queue.h

+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_NETDEV_RX_QUEUE_H
+#define _LINUX_NETDEV_RX_QUEUE_H
+
+#include <linux/kobject.h>
+#include <linux/netdevice.h>
+#include <linux/sysfs.h>
+#include <net/xdp.h>
+
+/* This structure contains an instance of an RX queue. */
+struct netdev_rx_queue {
+	struct xdp_rxq_info		xdp_rxq;
+#ifdef CONFIG_RPS
+	struct rps_map __rcu		*rps_map;
+	struct rps_dev_flow_table __rcu	*rps_flow_table;
+#endif
+	struct kobject			kobj;
+	struct net_device		*dev;
+	netdevice_tracker		dev_tracker;
+
+#ifdef CONFIG_XDP_SOCKETS
+	struct xsk_buff_pool            *pool;
+#endif
+} ____cacheline_aligned_in_smp;
+
+/*
+ * RX queue sysfs structures and functions.
+ */
+struct rx_queue_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
+	ssize_t (*store)(struct netdev_rx_queue *queue,
+			 const char *buf, size_t len);
+};
+
+static inline struct netdev_rx_queue *
+__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);
+	return index;
+}
+#endif
+#endif

net/bpf/test_run.c

@@ -20,6 +20,7 @@
 #include <linux/smp.h>
 #include <linux/sock_diag.h>
 #include <linux/netfilter.h>
+#include <net/netdev_rx_queue.h>
 #include <net/xdp.h>
 #include <net/netfilter/nf_bpf_link.h>
 

net/core/dev.c

@@ -152,6 +152,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/prandom.h>
 #include <linux/once_lite.h>
+#include <net/netdev_rx_queue.h>
 
 #include "dev.h"
 #include "net-sysfs.h"

net/core/net-sysfs.c

@@ -23,6 +23,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/cpu.h>
+#include <net/netdev_rx_queue.h>
 
 #include "dev.h"
 #include "net-sysfs.h"

net/xdp/xsk.c

@@ -25,6 +25,7 @@
 #include <linux/vmalloc.h>
 #include <net/xdp_sock_drv.h>
 #include <net/busy_poll.h>
+#include <net/netdev_rx_queue.h>
 #include <net/xdp.h>
 
 #include "xsk_queue.h"