1 #ifndef __PACKET_INTERNAL_H__ 2 #define __PACKET_INTERNAL_H__ 3 4 struct packet_mclist { 5 struct packet_mclist *next; 6 int ifindex; 7 int count; 8 unsigned short type; 9 unsigned short alen; 10 unsigned char addr[MAX_ADDR_LEN]; 11 }; 12 13 /* kbdq - kernel block descriptor queue */ 14 struct tpacket_kbdq_core { 15 struct pgv *pkbdq; 16 unsigned int feature_req_word; 17 unsigned int hdrlen; 18 unsigned char reset_pending_on_curr_blk; 19 unsigned char delete_blk_timer; 20 unsigned short kactive_blk_num; 21 unsigned short blk_sizeof_priv; 22 23 /* last_kactive_blk_num: 24 * trick to see if user-space has caught up 25 * in order to avoid refreshing timer when every single pkt arrives. 26 */ 27 unsigned short last_kactive_blk_num; 28 29 char *pkblk_start; 30 char *pkblk_end; 31 int kblk_size; 32 unsigned int knum_blocks; 33 uint64_t knxt_seq_num; 34 char *prev; 35 char *nxt_offset; 36 struct sk_buff *skb; 37 38 atomic_t blk_fill_in_prog; 39 40 /* Default is set to 8ms */ 41 #define DEFAULT_PRB_RETIRE_TOV (8) 42 43 unsigned short retire_blk_tov; 44 unsigned short version; 45 unsigned long tov_in_jiffies; 46 47 /* timer to retire an outstanding block */ 48 struct timer_list retire_blk_timer; 49 }; 50 51 struct pgv { 52 char *buffer; 53 }; 54 55 struct packet_ring_buffer { 56 struct pgv *pg_vec; 57 58 unsigned int head; 59 unsigned int frames_per_block; 60 unsigned int frame_size; 61 unsigned int frame_max; 62 63 unsigned int pg_vec_order; 64 unsigned int pg_vec_pages; 65 unsigned int pg_vec_len; 66 67 atomic_t pending; 68 69 struct tpacket_kbdq_core prb_bdqc; 70 }; 71 72 extern struct mutex fanout_mutex; 73 #define PACKET_FANOUT_MAX 256 74 75 struct packet_fanout { 76 #ifdef CONFIG_NET_NS 77 struct net *net; 78 #endif 79 unsigned int num_members; 80 u16 id; 81 u8 type; 82 u8 flags; 83 atomic_t rr_cur; 84 struct list_head list; 85 struct sock *arr[PACKET_FANOUT_MAX]; 86 int next[PACKET_FANOUT_MAX]; 87 spinlock_t lock; 88 atomic_t sk_ref; 89 struct packet_type prot_hook ____cacheline_aligned_in_smp; 90 }; 91 92 struct packet_sock { 93 /* struct sock has to be the first member of packet_sock */ 94 struct sock sk; 95 struct packet_fanout *fanout; 96 union tpacket_stats_u stats; 97 struct packet_ring_buffer rx_ring; 98 struct packet_ring_buffer tx_ring; 99 int copy_thresh; 100 spinlock_t bind_lock; 101 struct mutex pg_vec_lock; 102 unsigned int running:1, /* prot_hook is attached*/ 103 auxdata:1, 104 origdev:1, 105 has_vnet_hdr:1; 106 int ifindex; /* bound device */ 107 __be16 num; 108 struct packet_mclist *mclist; 109 atomic_t mapped; 110 enum tpacket_versions tp_version; 111 unsigned int tp_hdrlen; 112 unsigned int tp_reserve; 113 unsigned int tp_loss:1; 114 unsigned int tp_tx_has_off:1; 115 unsigned int tp_tstamp; 116 struct net_device __rcu *cached_dev; 117 struct packet_type prot_hook ____cacheline_aligned_in_smp; 118 }; 119 120 static struct packet_sock *pkt_sk(struct sock *sk) 121 { 122 return (struct packet_sock *)sk; 123 } 124 125 #endif 126