v4.19.13 snapshot.
diff --git a/net/packet/internal.h b/net/packet/internal.h
new file mode 100644
index 0000000..3bb7c5f
--- /dev/null
+++ b/net/packet/internal.h
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PACKET_INTERNAL_H__
+#define __PACKET_INTERNAL_H__
+
+#include <linux/refcount.h>
+
+struct packet_mclist {
+ struct packet_mclist *next;
+ int ifindex;
+ int count;
+ unsigned short type;
+ unsigned short alen;
+ unsigned char addr[MAX_ADDR_LEN];
+};
+
+/* kbdq - kernel block descriptor queue */
+struct tpacket_kbdq_core {
+ struct pgv *pkbdq;
+ unsigned int feature_req_word;
+ unsigned int hdrlen;
+ unsigned char reset_pending_on_curr_blk;
+ unsigned char delete_blk_timer;
+ unsigned short kactive_blk_num;
+ unsigned short blk_sizeof_priv;
+
+ /* last_kactive_blk_num:
+ * trick to see if user-space has caught up
+ * in order to avoid refreshing timer when every single pkt arrives.
+ */
+ unsigned short last_kactive_blk_num;
+
+ char *pkblk_start;
+ char *pkblk_end;
+ int kblk_size;
+ unsigned int max_frame_len;
+ unsigned int knum_blocks;
+ uint64_t knxt_seq_num;
+ char *prev;
+ char *nxt_offset;
+ struct sk_buff *skb;
+
+ atomic_t blk_fill_in_prog;
+
+ /* Default is set to 8ms */
+#define DEFAULT_PRB_RETIRE_TOV (8)
+
+ unsigned short retire_blk_tov;
+ unsigned short version;
+ unsigned long tov_in_jiffies;
+
+ /* timer to retire an outstanding block */
+ struct timer_list retire_blk_timer;
+};
+
+struct pgv {
+ char *buffer;
+};
+
+struct packet_ring_buffer {
+ struct pgv *pg_vec;
+
+ unsigned int head;
+ unsigned int frames_per_block;
+ unsigned int frame_size;
+ unsigned int frame_max;
+
+ unsigned int pg_vec_order;
+ unsigned int pg_vec_pages;
+ unsigned int pg_vec_len;
+
+ unsigned int __percpu *pending_refcnt;
+
+ struct tpacket_kbdq_core prb_bdqc;
+};
+
+extern struct mutex fanout_mutex;
+#define PACKET_FANOUT_MAX 256
+
+struct packet_fanout {
+ possible_net_t net;
+ unsigned int num_members;
+ u16 id;
+ u8 type;
+ u8 flags;
+ union {
+ atomic_t rr_cur;
+ struct bpf_prog __rcu *bpf_prog;
+ };
+ struct list_head list;
+ struct sock *arr[PACKET_FANOUT_MAX];
+ spinlock_t lock;
+ refcount_t sk_ref;
+ struct packet_type prot_hook ____cacheline_aligned_in_smp;
+};
+
+struct packet_rollover {
+ int sock;
+ atomic_long_t num;
+ atomic_long_t num_huge;
+ atomic_long_t num_failed;
+#define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32))
+ u32 history[ROLLOVER_HLEN] ____cacheline_aligned;
+} ____cacheline_aligned_in_smp;
+
+struct packet_sock {
+ /* struct sock has to be the first member of packet_sock */
+ struct sock sk;
+ struct packet_fanout *fanout;
+ union tpacket_stats_u stats;
+ struct packet_ring_buffer rx_ring;
+ struct packet_ring_buffer tx_ring;
+ int copy_thresh;
+ spinlock_t bind_lock;
+ struct mutex pg_vec_lock;
+ unsigned int running; /* bind_lock must be held */
+ unsigned int auxdata:1, /* writer must hold sock lock */
+ origdev:1,
+ has_vnet_hdr:1,
+ tp_loss:1,
+ tp_tx_has_off:1;
+ int pressure;
+ int ifindex; /* bound device */
+ __be16 num;
+ struct packet_rollover *rollover;
+ struct packet_mclist *mclist;
+ atomic_t mapped;
+ enum tpacket_versions tp_version;
+ unsigned int tp_hdrlen;
+ unsigned int tp_reserve;
+ unsigned int tp_tstamp;
+ struct net_device __rcu *cached_dev;
+ int (*xmit)(struct sk_buff *skb);
+ struct packet_type prot_hook ____cacheline_aligned_in_smp;
+};
+
+static struct packet_sock *pkt_sk(struct sock *sk)
+{
+ return (struct packet_sock *)sk;
+}
+
+#endif