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147 lines
3.3 KiB
147 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __PACKET_INTERNAL_H__ |
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#define __PACKET_INTERNAL_H__ |
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#include <linux/refcount.h> |
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struct packet_mclist { |
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struct packet_mclist *next; |
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int ifindex; |
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int count; |
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unsigned short type; |
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unsigned short alen; |
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unsigned char addr[MAX_ADDR_LEN]; |
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}; |
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/* kbdq - kernel block descriptor queue */ |
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struct tpacket_kbdq_core { |
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struct pgv *pkbdq; |
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unsigned int feature_req_word; |
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unsigned int hdrlen; |
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unsigned char reset_pending_on_curr_blk; |
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unsigned char delete_blk_timer; |
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unsigned short kactive_blk_num; |
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unsigned short blk_sizeof_priv; |
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/* last_kactive_blk_num: |
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* trick to see if user-space has caught up |
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* in order to avoid refreshing timer when every single pkt arrives. |
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*/ |
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unsigned short last_kactive_blk_num; |
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char *pkblk_start; |
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char *pkblk_end; |
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int kblk_size; |
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unsigned int max_frame_len; |
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unsigned int knum_blocks; |
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uint64_t knxt_seq_num; |
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char *prev; |
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char *nxt_offset; |
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struct sk_buff *skb; |
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rwlock_t blk_fill_in_prog_lock; |
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/* Default is set to 8ms */ |
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#define DEFAULT_PRB_RETIRE_TOV (8) |
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unsigned short retire_blk_tov; |
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unsigned short version; |
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unsigned long tov_in_jiffies; |
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/* timer to retire an outstanding block */ |
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struct timer_list retire_blk_timer; |
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}; |
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struct pgv { |
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char *buffer; |
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}; |
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struct packet_ring_buffer { |
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struct pgv *pg_vec; |
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unsigned int head; |
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unsigned int frames_per_block; |
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unsigned int frame_size; |
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unsigned int frame_max; |
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unsigned int pg_vec_order; |
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unsigned int pg_vec_pages; |
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unsigned int pg_vec_len; |
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unsigned int __percpu *pending_refcnt; |
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union { |
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unsigned long *rx_owner_map; |
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struct tpacket_kbdq_core prb_bdqc; |
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}; |
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}; |
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extern struct mutex fanout_mutex; |
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#define PACKET_FANOUT_MAX (1 << 16) |
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struct packet_fanout { |
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possible_net_t net; |
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unsigned int num_members; |
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u32 max_num_members; |
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u16 id; |
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u8 type; |
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u8 flags; |
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union { |
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atomic_t rr_cur; |
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struct bpf_prog __rcu *bpf_prog; |
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}; |
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struct list_head list; |
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spinlock_t lock; |
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refcount_t sk_ref; |
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struct packet_type prot_hook ____cacheline_aligned_in_smp; |
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struct sock __rcu *arr[]; |
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}; |
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struct packet_rollover { |
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int sock; |
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atomic_long_t num; |
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atomic_long_t num_huge; |
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atomic_long_t num_failed; |
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#define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32)) |
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u32 history[ROLLOVER_HLEN] ____cacheline_aligned; |
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} ____cacheline_aligned_in_smp; |
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struct packet_sock { |
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/* struct sock has to be the first member of packet_sock */ |
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struct sock sk; |
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struct packet_fanout *fanout; |
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union tpacket_stats_u stats; |
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struct packet_ring_buffer rx_ring; |
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struct packet_ring_buffer tx_ring; |
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int copy_thresh; |
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spinlock_t bind_lock; |
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struct mutex pg_vec_lock; |
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unsigned int running; /* bind_lock must be held */ |
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unsigned int auxdata:1, /* writer must hold sock lock */ |
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origdev:1, |
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has_vnet_hdr:1, |
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tp_loss:1, |
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tp_tx_has_off:1; |
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int pressure; |
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int ifindex; /* bound device */ |
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__be16 num; |
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struct packet_rollover *rollover; |
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struct packet_mclist *mclist; |
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atomic_t mapped; |
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enum tpacket_versions tp_version; |
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unsigned int tp_hdrlen; |
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unsigned int tp_reserve; |
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unsigned int tp_tstamp; |
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struct completion skb_completion; |
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struct net_device __rcu *cached_dev; |
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int (*xmit)(struct sk_buff *skb); |
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struct packet_type prot_hook ____cacheline_aligned_in_smp; |
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atomic_t tp_drops ____cacheline_aligned_in_smp; |
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}; |
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static inline struct packet_sock *pkt_sk(struct sock *sk) |
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{ |
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return (struct packet_sock *)sk; |
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} |
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#endif
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