Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2787b04b PE |
2 | #ifndef __PACKET_INTERNAL_H__ |
3 | #define __PACKET_INTERNAL_H__ | |
4 | ||
fb5c2c17 RE |
5 | #include <linux/refcount.h> |
6 | ||
2787b04b PE |
7 | struct packet_mclist { |
8 | struct packet_mclist *next; | |
9 | int ifindex; | |
10 | int count; | |
11 | unsigned short type; | |
12 | unsigned short alen; | |
13 | unsigned char addr[MAX_ADDR_LEN]; | |
14 | }; | |
15 | ||
16 | /* kbdq - kernel block descriptor queue */ | |
17 | struct tpacket_kbdq_core { | |
18 | struct pgv *pkbdq; | |
19 | unsigned int feature_req_word; | |
20 | unsigned int hdrlen; | |
21 | unsigned char reset_pending_on_curr_blk; | |
22 | unsigned char delete_blk_timer; | |
23 | unsigned short kactive_blk_num; | |
24 | unsigned short blk_sizeof_priv; | |
25 | ||
26 | /* last_kactive_blk_num: | |
27 | * trick to see if user-space has caught up | |
28 | * in order to avoid refreshing timer when every single pkt arrives. | |
29 | */ | |
30 | unsigned short last_kactive_blk_num; | |
31 | ||
32 | char *pkblk_start; | |
33 | char *pkblk_end; | |
34 | int kblk_size; | |
dc808110 | 35 | unsigned int max_frame_len; |
2787b04b PE |
36 | unsigned int knum_blocks; |
37 | uint64_t knxt_seq_num; | |
38 | char *prev; | |
39 | char *nxt_offset; | |
40 | struct sk_buff *skb; | |
41 | ||
42 | atomic_t blk_fill_in_prog; | |
43 | ||
44 | /* Default is set to 8ms */ | |
45 | #define DEFAULT_PRB_RETIRE_TOV (8) | |
46 | ||
47 | unsigned short retire_blk_tov; | |
48 | unsigned short version; | |
49 | unsigned long tov_in_jiffies; | |
50 | ||
51 | /* timer to retire an outstanding block */ | |
52 | struct timer_list retire_blk_timer; | |
53 | }; | |
54 | ||
55 | struct pgv { | |
56 | char *buffer; | |
57 | }; | |
58 | ||
59 | struct packet_ring_buffer { | |
60 | struct pgv *pg_vec; | |
0578edc5 | 61 | |
2787b04b PE |
62 | unsigned int head; |
63 | unsigned int frames_per_block; | |
64 | unsigned int frame_size; | |
65 | unsigned int frame_max; | |
66 | ||
3a7ad063 | 67 | unsigned int pg_vec_order; |
2787b04b PE |
68 | unsigned int pg_vec_pages; |
69 | unsigned int pg_vec_len; | |
70 | ||
b0138408 | 71 | unsigned int __percpu *pending_refcnt; |
0578edc5 | 72 | |
61fad681 WB |
73 | union { |
74 | unsigned long *rx_owner_map; | |
75 | struct tpacket_kbdq_core prb_bdqc; | |
76 | }; | |
2787b04b PE |
77 | }; |
78 | ||
fff3321d PE |
79 | extern struct mutex fanout_mutex; |
80 | #define PACKET_FANOUT_MAX 256 | |
81 | ||
82 | struct packet_fanout { | |
0c5c9fb5 | 83 | possible_net_t net; |
fff3321d PE |
84 | unsigned int num_members; |
85 | u16 id; | |
86 | u8 type; | |
77f65ebd | 87 | u8 flags; |
47dceb8e WB |
88 | union { |
89 | atomic_t rr_cur; | |
90 | struct bpf_prog __rcu *bpf_prog; | |
91 | }; | |
fff3321d PE |
92 | struct list_head list; |
93 | struct sock *arr[PACKET_FANOUT_MAX]; | |
94 | spinlock_t lock; | |
fb5c2c17 | 95 | refcount_t sk_ref; |
fff3321d PE |
96 | struct packet_type prot_hook ____cacheline_aligned_in_smp; |
97 | }; | |
98 | ||
0648ab70 WB |
99 | struct packet_rollover { |
100 | int sock; | |
a9b63918 WB |
101 | atomic_long_t num; |
102 | atomic_long_t num_huge; | |
103 | atomic_long_t num_failed; | |
3b3a5b0a WB |
104 | #define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32)) |
105 | u32 history[ROLLOVER_HLEN] ____cacheline_aligned; | |
0648ab70 WB |
106 | } ____cacheline_aligned_in_smp; |
107 | ||
2787b04b PE |
108 | struct packet_sock { |
109 | /* struct sock has to be the first member of packet_sock */ | |
110 | struct sock sk; | |
111 | struct packet_fanout *fanout; | |
ee80fbf3 | 112 | union tpacket_stats_u stats; |
2787b04b PE |
113 | struct packet_ring_buffer rx_ring; |
114 | struct packet_ring_buffer tx_ring; | |
115 | int copy_thresh; | |
116 | spinlock_t bind_lock; | |
117 | struct mutex pg_vec_lock; | |
a6361f0c WB |
118 | unsigned int running; /* bind_lock must be held */ |
119 | unsigned int auxdata:1, /* writer must hold sock lock */ | |
2787b04b | 120 | origdev:1, |
a6361f0c WB |
121 | has_vnet_hdr:1, |
122 | tp_loss:1, | |
123 | tp_tx_has_off:1; | |
2ccdbaa6 | 124 | int pressure; |
2787b04b PE |
125 | int ifindex; /* bound device */ |
126 | __be16 num; | |
0648ab70 | 127 | struct packet_rollover *rollover; |
2787b04b PE |
128 | struct packet_mclist *mclist; |
129 | atomic_t mapped; | |
130 | enum tpacket_versions tp_version; | |
131 | unsigned int tp_hdrlen; | |
132 | unsigned int tp_reserve; | |
2787b04b | 133 | unsigned int tp_tstamp; |
89ed5b51 | 134 | struct completion skb_completion; |
e40526cb | 135 | struct net_device __rcu *cached_dev; |
d346a3fa | 136 | int (*xmit)(struct sk_buff *skb); |
2787b04b | 137 | struct packet_type prot_hook ____cacheline_aligned_in_smp; |
8e8e2951 | 138 | atomic_t tp_drops ____cacheline_aligned_in_smp; |
2787b04b PE |
139 | }; |
140 | ||
141 | static struct packet_sock *pkt_sk(struct sock *sk) | |
142 | { | |
143 | return (struct packet_sock *)sk; | |
144 | } | |
145 | ||
146 | #endif |