Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
new file mode 100644
index 0000000000..69b472604b
--- /dev/null
+++ b/include/net/xdp_sock.h
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* AF_XDP internal functions
+ * Copyright(c) 2018 Intel Corporation.
+ */
+
+#ifndef _LINUX_XDP_SOCK_H
+#define _LINUX_XDP_SOCK_H
+
+#include <linux/bpf.h>
+#include <linux/workqueue.h>
+#include <linux/if_xdp.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <net/sock.h>
+
+#define XDP_UMEM_SG_FLAG (1 << 1)
+
+struct net_device;
+struct xsk_queue;
+struct xdp_buff;
+
+struct xdp_umem {
+	void *addrs;
+	u64 size;
+	u32 headroom;
+	u32 chunk_size;
+	u32 chunks;
+	u32 npgs;
+	struct user_struct *user;
+	refcount_t users;
+	u8 flags;
+	bool zc;
+	struct page **pgs;
+	int id;
+	struct list_head xsk_dma_list;
+	struct work_struct work;
+};
+
+struct xsk_map {
+	struct bpf_map map;
+	spinlock_t lock; /* Synchronize map updates */
+	atomic_t count;
+	struct xdp_sock __rcu *xsk_map[];
+};
+
+struct xdp_sock {
+	/* struct sock must be the first member of struct xdp_sock */
+	struct sock sk;
+	struct xsk_queue *rx ____cacheline_aligned_in_smp;
+	struct net_device *dev;
+	struct xdp_umem *umem;
+	struct list_head flush_node;
+	struct xsk_buff_pool *pool;
+	u16 queue_id;
+	bool zc;
+	bool sg;
+	enum {
+		XSK_READY = 0,
+		XSK_BOUND,
+		XSK_UNBOUND,
+	} state;
+
+	struct xsk_queue *tx ____cacheline_aligned_in_smp;
+	struct list_head tx_list;
+	/* Protects generic receive. */
+	spinlock_t rx_lock;
+
+	/* Statistics */
+	u64 rx_dropped;
+	u64 rx_queue_full;
+
+	/* When __xsk_generic_xmit() must return before it sees the EOP descriptor for the current
+	 * packet, the partially built skb is saved here so that packet building can resume in next
+	 * call of __xsk_generic_xmit().
+	 */
+	struct sk_buff *skb;
+
+	struct list_head map_list;
+	/* Protects map_list */
+	spinlock_t map_list_lock;
+	/* Protects multiple processes in the control path */
+	struct mutex mutex;
+	struct xsk_queue *fq_tmp; /* Only as tmp storage before bind */
+	struct xsk_queue *cq_tmp; /* Only as tmp storage before bind */
+};
+
+#ifdef CONFIG_XDP_SOCKETS
+
+int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
+int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp);
+void __xsk_map_flush(void);
+
+#else
+
+static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
+{
+	return -ENOTSUPP;
+}
+
+static inline int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void __xsk_map_flush(void)
+{
+}
+
+#endif /* CONFIG_XDP_SOCKETS */
+
+#endif /* _LINUX_XDP_SOCK_H */