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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PACKET_INTERNAL_H__
3#define __PACKET_INTERNAL_H__
4
5#include <linux/refcount.h>
6
7struct 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 */
17struct 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;
35 unsigned int max_frame_len;
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 rwlock_t blk_fill_in_prog_lock;
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
55struct pgv {
56 char *buffer;
57};
58
59struct packet_ring_buffer {
60 struct pgv *pg_vec;
61
62 unsigned int head;
63 unsigned int frames_per_block;
64 unsigned int frame_size;
65 unsigned int frame_max;
66
67 unsigned int pg_vec_order;
68 unsigned int pg_vec_pages;
69 unsigned int pg_vec_len;
70
71 unsigned int __percpu *pending_refcnt;
72
73 union {
74 unsigned long *rx_owner_map;
75 struct tpacket_kbdq_core prb_bdqc;
76 };
77};
78
79extern struct mutex fanout_mutex;
80#define PACKET_FANOUT_MAX 256
81
82struct packet_fanout {
83 possible_net_t net;
84 unsigned int num_members;
85 u16 id;
86 u8 type;
87 u8 flags;
88 union {
89 atomic_t rr_cur;
90 struct bpf_prog __rcu *bpf_prog;
91 };
92 struct list_head list;
93 struct sock *arr[PACKET_FANOUT_MAX];
94 spinlock_t lock;
95 refcount_t sk_ref;
96 struct packet_type prot_hook ____cacheline_aligned_in_smp;
97};
98
99struct packet_rollover {
100 int sock;
101 atomic_long_t num;
102 atomic_long_t num_huge;
103 atomic_long_t num_failed;
104#define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32))
105 u32 history[ROLLOVER_HLEN] ____cacheline_aligned;
106} ____cacheline_aligned_in_smp;
107
108struct packet_sock {
109 /* struct sock has to be the first member of packet_sock */
110 struct sock sk;
111 struct packet_fanout *fanout;
112 union tpacket_stats_u stats;
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;
118 unsigned int running; /* bind_lock must be held */
119 unsigned int auxdata:1, /* writer must hold sock lock */
120 origdev:1,
121 has_vnet_hdr:1,
122 tp_loss:1,
123 tp_tx_has_off:1;
124 int pressure;
125 int ifindex; /* bound device */
126 __be16 num;
127 struct packet_rollover *rollover;
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;
133 unsigned int tp_tstamp;
134 struct completion skb_completion;
135 struct net_device __rcu *cached_dev;
136 int (*xmit)(struct sk_buff *skb);
137 struct packet_type prot_hook ____cacheline_aligned_in_smp;
138 atomic_t tp_drops ____cacheline_aligned_in_smp;
139};
140
141static struct packet_sock *pkt_sk(struct sock *sk)
142{
143 return (struct packet_sock *)sk;
144}
145
146#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PACKET_INTERNAL_H__
3#define __PACKET_INTERNAL_H__
4
5#include <linux/refcount.h>
6
7struct 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 */
17struct 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;
35 unsigned int max_frame_len;
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 rwlock_t blk_fill_in_prog_lock;
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
55struct pgv {
56 char *buffer;
57};
58
59struct packet_ring_buffer {
60 struct pgv *pg_vec;
61
62 unsigned int head;
63 unsigned int frames_per_block;
64 unsigned int frame_size;
65 unsigned int frame_max;
66
67 unsigned int pg_vec_order;
68 unsigned int pg_vec_pages;
69 unsigned int pg_vec_len;
70
71 unsigned int __percpu *pending_refcnt;
72
73 union {
74 unsigned long *rx_owner_map;
75 struct tpacket_kbdq_core prb_bdqc;
76 };
77};
78
79extern struct mutex fanout_mutex;
80#define PACKET_FANOUT_MAX 256
81
82struct packet_fanout {
83 possible_net_t net;
84 unsigned int num_members;
85 u16 id;
86 u8 type;
87 u8 flags;
88 union {
89 atomic_t rr_cur;
90 struct bpf_prog __rcu *bpf_prog;
91 };
92 struct list_head list;
93 struct sock *arr[PACKET_FANOUT_MAX];
94 spinlock_t lock;
95 refcount_t sk_ref;
96 struct packet_type prot_hook ____cacheline_aligned_in_smp;
97};
98
99struct packet_rollover {
100 int sock;
101 atomic_long_t num;
102 atomic_long_t num_huge;
103 atomic_long_t num_failed;
104#define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32))
105 u32 history[ROLLOVER_HLEN] ____cacheline_aligned;
106} ____cacheline_aligned_in_smp;
107
108struct packet_sock {
109 /* struct sock has to be the first member of packet_sock */
110 struct sock sk;
111 struct packet_fanout *fanout;
112 union tpacket_stats_u stats;
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;
118 unsigned int running; /* bind_lock must be held */
119 unsigned int auxdata:1, /* writer must hold sock lock */
120 origdev:1,
121 has_vnet_hdr:1,
122 tp_loss:1,
123 tp_tx_has_off:1;
124 int pressure;
125 int ifindex; /* bound device */
126 __be16 num;
127 struct packet_rollover *rollover;
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;
133 unsigned int tp_tstamp;
134 struct completion skb_completion;
135 struct net_device __rcu *cached_dev;
136 int (*xmit)(struct sk_buff *skb);
137 struct packet_type prot_hook ____cacheline_aligned_in_smp;
138 atomic_t tp_drops ____cacheline_aligned_in_smp;
139};
140
141static struct packet_sock *pkt_sk(struct sock *sk)
142{
143 return (struct packet_sock *)sk;
144}
145
146#endif