/* 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; rwlock_t blk_fill_in_prog_lock; /* 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; union { unsigned long *rx_owner_map; struct tpacket_kbdq_core prb_bdqc; }; }; extern struct mutex fanout_mutex; #define PACKET_FANOUT_MAX (1 << 16) struct packet_fanout { possible_net_t net; unsigned int num_members; u32 max_num_members; u16 id; u8 type; u8 flags; union { atomic_t rr_cur; struct bpf_prog __rcu *bpf_prog; }; struct list_head list; spinlock_t lock; refcount_t sk_ref; struct packet_type prot_hook ____cacheline_aligned_in_smp; struct sock __rcu *arr[] __counted_by(max_num_members); }; 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 long flags; int ifindex; /* bound device */ u8 vnet_hdr_sz; __be16 num; struct packet_rollover *rollover; struct packet_mclist *mclist; atomic_long_t mapped; enum tpacket_versions tp_version; unsigned int tp_hdrlen; unsigned int tp_reserve; unsigned int tp_tstamp; struct completion skb_completion; struct net_device __rcu *cached_dev; struct packet_type prot_hook ____cacheline_aligned_in_smp; atomic_t tp_drops ____cacheline_aligned_in_smp; }; #define pkt_sk(ptr) container_of_const(ptr, struct packet_sock, sk) enum packet_sock_flags { PACKET_SOCK_ORIGDEV, PACKET_SOCK_AUXDATA, PACKET_SOCK_TX_HAS_OFF, PACKET_SOCK_TP_LOSS, PACKET_SOCK_RUNNING, PACKET_SOCK_PRESSURE, PACKET_SOCK_QDISC_BYPASS, }; static inline void packet_sock_flag_set(struct packet_sock *po, enum packet_sock_flags flag, bool val) { if (val) set_bit(flag, &po->flags); else clear_bit(flag, &po->flags); } static inline bool packet_sock_flag(const struct packet_sock *po, enum packet_sock_flags flag) { return test_bit(flag, &po->flags); } #endif