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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 (1 << 16)
81
82struct packet_fanout {
83 possible_net_t net;
84 unsigned int num_members;
85 u32 max_num_members;
86 u16 id;
87 u8 type;
88 u8 flags;
89 union {
90 atomic_t rr_cur;
91 struct bpf_prog __rcu *bpf_prog;
92 };
93 struct list_head list;
94 spinlock_t lock;
95 refcount_t sk_ref;
96 struct packet_type prot_hook ____cacheline_aligned_in_smp;
97 struct sock __rcu *arr[] __counted_by(max_num_members);
98};
99
100struct packet_rollover {
101 int sock;
102 atomic_long_t num;
103 atomic_long_t num_huge;
104 atomic_long_t num_failed;
105#define ROLLOVER_HLEN (L1_CACHE_BYTES / sizeof(u32))
106 u32 history[ROLLOVER_HLEN] ____cacheline_aligned;
107} ____cacheline_aligned_in_smp;
108
109struct packet_sock {
110 /* struct sock has to be the first member of packet_sock */
111 struct sock sk;
112 struct packet_fanout *fanout;
113 union tpacket_stats_u stats;
114 struct packet_ring_buffer rx_ring;
115 struct packet_ring_buffer tx_ring;
116 int copy_thresh;
117 spinlock_t bind_lock;
118 struct mutex pg_vec_lock;
119 unsigned long flags;
120 int ifindex; /* bound device */
121 u8 vnet_hdr_sz;
122 __be16 num;
123 struct packet_rollover *rollover;
124 struct packet_mclist *mclist;
125 atomic_long_t mapped;
126 enum tpacket_versions tp_version;
127 unsigned int tp_hdrlen;
128 unsigned int tp_reserve;
129 unsigned int tp_tstamp;
130 struct completion skb_completion;
131 struct net_device __rcu *cached_dev;
132 struct packet_type prot_hook ____cacheline_aligned_in_smp;
133 atomic_t tp_drops ____cacheline_aligned_in_smp;
134};
135
136#define pkt_sk(ptr) container_of_const(ptr, struct packet_sock, sk)
137
138enum packet_sock_flags {
139 PACKET_SOCK_ORIGDEV,
140 PACKET_SOCK_AUXDATA,
141 PACKET_SOCK_TX_HAS_OFF,
142 PACKET_SOCK_TP_LOSS,
143 PACKET_SOCK_RUNNING,
144 PACKET_SOCK_PRESSURE,
145 PACKET_SOCK_QDISC_BYPASS,
146};
147
148static inline void packet_sock_flag_set(struct packet_sock *po,
149 enum packet_sock_flags flag,
150 bool val)
151{
152 if (val)
153 set_bit(flag, &po->flags);
154 else
155 clear_bit(flag, &po->flags);
156}
157
158static inline bool packet_sock_flag(const struct packet_sock *po,
159 enum packet_sock_flags flag)
160{
161 return test_bit(flag, &po->flags);
162}
163
164#endif
1#ifndef __PACKET_INTERNAL_H__
2#define __PACKET_INTERNAL_H__
3
4struct 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 */
14struct 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
51struct pgv {
52 char *buffer;
53};
54
55struct 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 unsigned int __percpu *pending_refcnt;
68
69 struct tpacket_kbdq_core prb_bdqc;
70};
71
72extern struct mutex fanout_mutex;
73#define PACKET_FANOUT_MAX 256
74
75struct 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
92struct 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 int (*xmit)(struct sk_buff *skb);
118 struct packet_type prot_hook ____cacheline_aligned_in_smp;
119};
120
121static struct packet_sock *pkt_sk(struct sock *sk)
122{
123 return (struct packet_sock *)sk;
124}
125
126#endif